cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb2410162-1
title: Unraveling Quantum Enigmas: From Unconventional Superconductivity to Kagome-Based Materials in Ta2V3.1Si0.9

description: Ta2V3.1Si0.9 compound features a layered hexagonal structure with a prominent kagome plane pri- marily composed of vanadium atoms, hinting at intriguing atomic interactions. It exhibits mod- erately coupled superconductivity, defying BCS theory with a critical temperature of 7.5 Kelvin. Further exploration uncovers an unexpectedly large upper critical field and unique spin paramag- netic effects, pointing towards unconventional superconductivity mechanisms. Spin-orbit scattering provides clues to a delicate interplay of fundamental forces, expanding our understanding of super- conductivity. DFT calculations reveal a crucial Van Hove singularity band associated with V-dyz states, shedding light on electronic behavior. In-plane vibrations of vanadium atoms play a crucial role in the superconducting behavior, adding an unexpected layer of complexity. Our objective is to conduct Zero-Field (ZF) and Transverse Field (TF) Muon Spin Relaxation/Rotation (μSR) experi- ments to unveil the final secrets of Ta2V3.1Si0.9. This research not only redefines our understanding of superconductivity but also paves the way for exploring kagome-based materials, offering potential insights into nontrivial band structures and quantum phenomena. The future holds promise for uncovering the mysteries of the quantum world.
DOI: 10.5286/isis.e.rb2410398
title: Determining the crystal structure of a newly discovered phase in the NaCl-D2O system relevant to cryovolcanism at icy moons

description: We have recently identified a new metastable crystalline NaCl-D2O phase that forms under low temperature conditions relevant to cryovolcanic processes on icy moons. This is the first new NaCl hydrate reported at ambient pressures in over 150 years. We aim to determine the crystal structure of this previously unknown NaCl-D2O phase. Because its presence could act as a proxy for the physical conditions of cryovolcanic activity on icy moons, its characterisation is crucial with two upcoming missions to icy moons aiming to study cryovolcanic deposits on their surfaces.
DOI: 10.5286/isis.e.rb2410398-1
title: Determining the crystal structure of a newly discovered phase in the NaCl-D2O system relevant to cryovolcanism at icy moons

description: We have recently identified a new metastable crystalline NaCl-D2O phase that forms under low temperature conditions relevant to cryovolcanic processes on icy moons. This is the first new NaCl hydrate reported at ambient pressures in over 150 years. We aim to determine the crystal structure of this previously unknown NaCl-D2O phase. Because its presence could act as a proxy for the physical conditions of cryovolcanic activity on icy moons, its characterisation is crucial with two upcoming missions to icy moons aiming to study cryovolcanic deposits on their surfaces.
DOI: 10.3535/f0v-54n-jq0
title: Lythrum portula (L.) D. A. Webb

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/pz9-zjj-shd
title: Plantae

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220470-2
title: Characterization of RS relaxation and precipitation behaviours as a function of energy input in a L-PBF IN718 material

description: The Laser based Powder Bed Fusion (L-PBF) technique alows the manufacturing of complex shaped components. Nevertheless, a disadvantage of this technology is the high magnitudes of residual stress (RS) present in as-built components. The optimal heat treatment to remove the potentially deleterious RS needs to be balanced against obtaining suitable microstructures and properties. Most RS studies on IN718 relaxation focus on a single processing strategy, investigating ex-situ specimens at discrete temperatures and times. Nevertheless, the influence of the componnet thermal history on recrystallization and precipitation of the strengthening phases has been not yet investigated in detail. Therefore, an in-situ study fis proposed to provide further fundamental understanding of the stress relaxation behaviour of L-PBF IN718 microstructures as a function of manufacturing process parameters.
DOI: 10.5286/isis.e.rb2410162
title: Unraveling Quantum Enigmas: From Unconventional Superconductivity to Kagome-Based Materials in Ta2V3.1Si0.9

description: Ta2V3.1Si0.9 compound features a layered hexagonal structure with a prominent kagome plane pri- marily composed of vanadium atoms, hinting at intriguing atomic interactions. It exhibits mod- erately coupled superconductivity, defying BCS theory with a critical temperature of 7.5 Kelvin. Further exploration uncovers an unexpectedly large upper critical field and unique spin paramag- netic effects, pointing towards unconventional superconductivity mechanisms. Spin-orbit scattering provides clues to a delicate interplay of fundamental forces, expanding our understanding of super- conductivity. DFT calculations reveal a crucial Van Hove singularity band associated with V-dyz states, shedding light on electronic behavior. In-plane vibrations of vanadium atoms play a crucial role in the superconducting behavior, adding an unexpected layer of complexity. Our objective is to conduct Zero-Field (ZF) and Transverse Field (TF) Muon Spin Relaxation/Rotation (μSR) experi- ments to unveil the final secrets of Ta2V3.1Si0.9. This research not only redefines our understanding of superconductivity but also paves the way for exploring kagome-based materials, offering potential insights into nontrivial band structures and quantum phenomena. The future holds promise for uncovering the mysteries of the quantum world.
DOI: 10.5286/isis.e.rb2410551-1
title: Structure and thermodynamics of 2-dimensional water: a neutron pair distribution function study

description: Confined water is ubiquitous and of central importance for a series of phenomena in condensed matter, materials science, biology, chemistry, and nanotechnology. Recent investigations show the properties of water confined at ångström and nanoscale strongly deviating from the bulk. However, it remains unclear which structural factors drive such anomalous behaviour while the phases are formed. Several theoretical studies on the water phases confined in 1- and 2D nanospace are found, nonetheless, experimental data to probe and validate the simulation results are still lacking. Our previous investigations, using our pioneering method of fabricating ångström channels down to a single molecular layer, also show intriguing deviations from the bulk such as ballistic flow and near-zero dielectric constant. Although still obscure, these and other evidence from the recent literature converge to the hypothesis that the physics governing the hydrogen bonding network may hold the key to unveil these phenomena at the quantum level. Herein, we propose that by stripping off one dimension, a much clearer understanding of this system can be achieved using neutron diffraction. The enhanced scattering signal of hydrogen and deuterium will, for the first time, build a much more resolved picture of the structure of 2-dimensional water and its transitions. Moreover, detectable diffuse scattering events will provide an exclusive and rich correlation with inelastic scattering data from other proposals.
DOI: 10.3535/adz-nzx-1xg
title: Atriplex L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2410551
title: Structure and thermodynamics of 2-dimensional water: a neutron pair distribution function study

description: Confined water is ubiquitous and of central importance for a series of phenomena in condensed matter, materials science, biology, chemistry, and nanotechnology. Recent investigations show the properties of water confined at ångström and nanoscale strongly deviating from the bulk. However, it remains unclear which structural factors drive such anomalous behaviour while the phases are formed. Several theoretical studies on the water phases confined in 1- and 2D nanospace are found, nonetheless, experimental data to probe and validate the simulation results are still lacking. Our previous investigations, using our pioneering method of fabricating ångström channels down to a single molecular layer, also show intriguing deviations from the bulk such as ballistic flow and near-zero dielectric constant. Although still obscure, these and other evidence from the recent literature converge to the hypothesis that the physics governing the hydrogen bonding network may hold the key to unveil these phenomena at the quantum level. Herein, we propose that by stripping off one dimension, a much clearer understanding of this system can be achieved using neutron diffraction. The enhanced scattering signal of hydrogen and deuterium will, for the first time, build a much more resolved picture of the structure of 2-dimensional water and its transitions. Moreover, detectable diffuse scattering events will provide an exclusive and rich correlation with inelastic scattering data from other proposals.
DOI: 10.5286/isis.e.rb2410625-1
title: Network structure in marine protective coatings: Correlating PALS, Neutron Scattering and Diffusion to improve Wind Turbine lifetimes

description: Wind turbines and in particular off-shore wind turbines have been the mainstay of zero carbon energy production in the UK. They are protected by epoxy resins that are required to resist the harsh climate out at sea. Whilst the blades are made mainly from glass fibre, the masts are steel. These masts are liable to corrode and thus the protective coating is a critical component in this assembly. Currently these masts are regularly inspected, initially manually, more recently drones are being used. Prolonging the life expectancy of the coating in any way would reduce the need for inspection. Understanding how water permeates the structure of epoxy resins in both filled (with corrosion inhibitors) and unfilled epoxy systems is key. Additionally, bulk tankers carry chemicals (e.g. methanol) around the world, epoxy resin is also used here as a protective coating. We have collected both water diffusion, SANS and PALS (positron annihilation lifetime spectroscopy) data to understand the structure of the epoxy systems and by using deuterated water or methanol, how these locate in the epoxy. PALS indicates structures on the order of 0.2 nm. While SANS indicates much larger structures, however the SANS does not deliver the higher Q data to corroborate the PALS data. We wish to undertake a series of NIMROD measurements to determine the structure of dry, partially and fully humidified (D2O) epoxy resin films.
DOI: 10.5286/isis.e.rb2490093-1
title: Magnetic Excitations of spin-1/2 J1-J2 alternating chain compound Cu2P2O7
DOI: 10.3535/2bp-dh4-h58
title: Armeria maritima (Mill.) Willd.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/ld0-4fj-zf5
title: Montia L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2410042
title: Variable temperature and pressure studies of a zero thermal expansion material

description: For the first time a single phase zero thermal expansion material has been tested under high pressure, this experiment yielded a soft bulk modulus of 23(7) GPa by a third order birch murnaghan equation of state and a phase transition at 3.4 GPa to another crystalline phase followed by amorphization above 5 GPa. Now we would like to investigate this material under both pressure and temperature to determine the pressure and temperature dependence of the thermal expansion properties of this material which demonstrates the largest reported range between 4 and 1400 K. Neutrons would be ideal for this as we could also determine the atomic scale perturbations of this material under pressure which is difficult because it contains oxygen.
DOI: 10.5286/isis.e.rb2410042-1
title: Variable temperature and pressure studies of a zero thermal expansion material

description: For the first time a single phase zero thermal expansion material has been tested under high pressure, this experiment yielded a soft bulk modulus of 23(7) GPa by a third order birch murnaghan equation of state and a phase transition at 3.4 GPa to another crystalline phase followed by amorphization above 5 GPa. Now we would like to investigate this material under both pressure and temperature to determine the pressure and temperature dependence of the thermal expansion properties of this material which demonstrates the largest reported range between 4 and 1400 K. Neutrons would be ideal for this as we could also determine the atomic scale perturbations of this material under pressure which is difficult because it contains oxygen.
DOI: 10.5286/isis.e.rb2410625
title: Network structure in marine protective coatings: Correlating PALS, Neutron Scattering and Diffusion to improve Wind Turbine lifetimes

description: Wind turbines and in particular off-shore wind turbines have been the mainstay of zero carbon energy production in the UK. They are protected by epoxy resins that are required to resist the harsh climate out at sea. Whilst the blades are made mainly from glass fibre, the masts are steel. These masts are liable to corrode and thus the protective coating is a critical component in this assembly. Currently these masts are regularly inspected, initially manually, more recently drones are being used. Prolonging the life expectancy of the coating in any way would reduce the need for inspection. Understanding how water permeates the structure of epoxy resins in both filled (with corrosion inhibitors) and unfilled epoxy systems is key. Additionally, bulk tankers carry chemicals (e.g. methanol) around the world, epoxy resin is also used here as a protective coating. We have collected both water diffusion, SANS and PALS (positron annihilation lifetime spectroscopy) data to understand the structure of the epoxy systems and by using deuterated water or methanol, how these locate in the epoxy. PALS indicates structures on the order of 0.2 nm. While SANS indicates much larger structures, however the SANS does not deliver the higher Q data to corroborate the PALS data. We wish to undertake a series of NIMROD measurements to determine the structure of dry, partially and fully humidified (D2O) epoxy resin films.
DOI: 10.34816/ifao.archives.232763
title: SAQQARA_nb_1994_03257

description: Référence : nb_1994_03257<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/hpy-jc5-a63
title: Antennaria dioica (L.) Gaertn.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/s5x-bh3-wpz
title: Catapodium rigidum (L.) C.E.Hubb.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2467010
title: Exploratory neutron histology of blood vessel preservation in Cretaceous dinosaur bone

description: This project aims to explore the application of neutron tomography for discovery of soft tissues in fossils. More specifically, the focus is on preserved blood vessels in Cretaceous dinosaur bones that have been recently discovered by our team through the use of synchrotron radiation techniques performed at the Canadian Light Source. The project offers an opportunity to combine well established use of synchrotron radiation techniques with neutron beams at IMAT beamline to provide complementary analysis of ancient soft tissue preservation, and possibly resolve vessel structures in dense bone where synchrotron radiation tomography contrast is limited. This research will help support inferences on evolution (related to the healed fractures on the bone samples) and help redefine the limits of soft tissue preservation in deep time.
DOI: 10.5286/isis.e.rb2467010-1
title: Exploratory neutron histology of blood vessel preservation in Cretaceous dinosaur bone

description: This project aims to explore the application of neutron tomography for discovery of soft tissues in fossils. More specifically, the focus is on preserved blood vessels in Cretaceous dinosaur bones that have been recently discovered by our team through the use of synchrotron radiation techniques performed at the Canadian Light Source. The project offers an opportunity to combine well established use of synchrotron radiation techniques with neutron beams at IMAT beamline to provide complementary analysis of ancient soft tissue preservation, and possibly resolve vessel structures in dense bone where synchrotron radiation tomography contrast is limited. This research will help support inferences on evolution (related to the healed fractures on the bone samples) and help redefine the limits of soft tissue preservation in deep time.
DOI: 10.3535/fpd-05c-man
title: Galium verum L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/x7y-6kw-pcy
title: Callitriche L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310161-1
title: Crystal-field excitations in the spin-liquid candidate on a rare-earth based Jeff=1/2 square lattice antiferromagnet NaNdTiO4

description: Quantum spin-liquid (QSL) refers to a highly entangled state wherein strong frustration-induced quantum fluctuations prevent phase transitions at T→0 in magnetic materials despite strong exchange interactions between spins. QSLs are ideal hosts of exotic fractional quantum numbers coupled to emergent gauge fields and hold tantalizing prospects for applications in fault-tolerant quantum computing. The experimental realization of QSLs in two-dimensional spin-lattice remains elusive in view of the presence of defects and anti-site disorder in real materials. Rare-earth-based frustrated magnets provide a novel route for exploring the enigmatic QSL state with fractional magnetic excitations. The recently synthesized structurally perfect square lattice antiferromagnet NaNdTiO4 seems a very promising QSL candidate, as confirmed by a series of macroscopic measurements. The localized Nd3+ spins show neither magnetic order nor spin-freezing state down to 1.9 K. Thermodynamic data reveal an effective Jeff = 1/2 (Nd3+) in the Kramers doublet state and an antiferromagnetic interaction between Jeff = 1/2 moments. This calls for a very sensitive local probe such as inelastic neutron scattering that could unambiguously establish the ground state and associated magnetic excitations. We propose to carry out INS studies to study the crystal field excitations, single-ion anisotropy and to probe the energy and wavevector dependence of the dynamic structure factor in NaNdTiO4.
DOI: 10.5286/isis.e.rb2410709
title: Demonstrating wood-smoke films at air-water interface are structured

description: The first example of large-scale structure in an atmospheric sample may have been glimpsed in a previous experiment (RB2310464). We seek to conduct three experiments using selective deuteration to demonstrate, confirm and publish the previous tentative observation. Thick wood smoke films (~400Å) may be forming three-layer structured films at the air-water interface of atmospheric aerosol, which will affect the light scattering ability of wildfire impacted aerosol. Using samples extracted from well-characterised woodsmokes generated at Karlsruhe and spiking the samples with deuterated probe molecules we hope to demonstrate that complex samples from the atmosphere may be forming simple three-layer films at the air-water interface. This would be the first experimental confirmation of such a system with atmospheric samples.
DOI: 10.5286/isis.e.rb2410709-1
title: Demonstrating wood-smoke films at air-water interface are structured

description: The first example of large-scale structure in an atmospheric sample may have been glimpsed in a previous experiment (RB2310464). We seek to conduct three experiments using selective deuteration to demonstrate, confirm and publish the previous tentative observation. Thick wood smoke films (~400Å) may be forming three-layer structured films at the air-water interface of atmospheric aerosol, which will affect the light scattering ability of wildfire impacted aerosol. Using samples extracted from well-characterised woodsmokes generated at Karlsruhe and spiking the samples with deuterated probe molecules we hope to demonstrate that complex samples from the atmosphere may be forming simple three-layer films at the air-water interface. This would be the first experimental confirmation of such a system with atmospheric samples.
DOI: 10.34816/ifao.archives.232764
title: SAQQARA_nb_1994_03258

description: Référence : nb_1994_03258<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/0ea-cc8-l8t
title: Vicia cracca L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220373-2
title: Na Diffusion in Alkaline doped NASICON (Na3.1Zr1.95M0.05Si2PO12 (M = Mg, Ba))

description: NASICON, Na1+xZr2SixP3?xO12 (0 ? x ? 3), are known for good room-temperature Na-conductivities (~10?4 Scm?1), owing to the presence of a 3D cation transportation channel. Recently, alkaline doped NASICONs (Na3.1Zr1.95M0.05Si2PO12 (M = Mg, Ca, Sr, Ba)) were discovered and show promising Na- ionic conductivity at 300 K (~10?3 Scm?1). We propose to study the QENS and INS measurements of pure and alkaline doped NASICON to investigate the effect of doping on phonon spectrum and Na diffusion and their interplay. A larger alkaline element would be supposed to enhance the channel width for Na diffusion; however, it may also shift the phonon energies and locally distort the lattice, which could reduce the Na conductivity. The QENS and INS measurements will allow probing Na diffusion and the role of phonons in facilitating the Na hopping between available Na sites.
DOI: 10.5286/isis.e.rb2310161
title: Crystal-field excitations in the spin-liquid candidate on a rare-earth based Jeff=1/2 square lattice antiferromagnet NaNdTiO4

description: Quantum spin-liquid (QSL) refers to a highly entangled state wherein strong frustration-induced quantum fluctuations prevent phase transitions at T→0 in magnetic materials despite strong exchange interactions between spins. QSLs are ideal hosts of exotic fractional quantum numbers coupled to emergent gauge fields and hold tantalizing prospects for applications in fault-tolerant quantum computing. The experimental realization of QSLs in two-dimensional spin-lattice remains elusive in view of the presence of defects and anti-site disorder in real materials. Rare-earth-based frustrated magnets provide a novel route for exploring the enigmatic QSL state with fractional magnetic excitations. The recently synthesized structurally perfect square lattice antiferromagnet NaNdTiO4 seems a very promising QSL candidate, as confirmed by a series of macroscopic measurements. The localized Nd3+ spins show neither magnetic order nor spin-freezing state down to 1.9 K. Thermodynamic data reveal an effective Jeff = 1/2 (Nd3+) in the Kramers doublet state and an antiferromagnetic interaction between Jeff = 1/2 moments. This calls for a very sensitive local probe such as inelastic neutron scattering that could unambiguously establish the ground state and associated magnetic excitations. We propose to carry out INS studies to study the crystal field excitations, single-ion anisotropy and to probe the energy and wavevector dependence of the dynamic structure factor in NaNdTiO4.
DOI: 10.5286/isis.e.rb2418000
title: ReMade: Probing oxygen-to-metal charge transfer in Co-based perovskites for oxygen evolution reaction catalysis
DOI: 10.5286/isis.e.rb2418000-1
title: ReMade: Probing oxygen-to-metal charge transfer in Co-based perovskites for oxygen evolution reaction catalysis