cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb2300051
title: Excitation spectrum in a spin-1 chain with alternating easy-axis direction

description: We plan to study a spin-1 antiferromagnet Ni(pym)(NO3)2(D2O)2, where the Ni(II) ions are connected in a staggered chain structure. Previous studies of similar spin-1/2 Cu(II) systems revealed a host of exotic excitations that map on the soliton and breather modes of the sine-Gordon model of quantum-field-theory. Spin-1 chains, however, are known to differ fundamentally from their spin-1/2 counterparts, and the structure of these materials suggests the presence of an unusual, alternating single-ion anisotropy. Recently, we studied a chiral spin-1 chain material [Ni(pym)(H2O)4]SO4 using inelastic neutron scattering (INS) on the LET instrument. Below the long-range ordering temperature, we find an information-rich excitation spectrum, which arises from the four-fold periodic alternation of the local easy axis. Similarly, in the staggered chain, we expect that the competition between the alternating anisotropy and antiferromagnetic will give rise to a unique excitation spectrum. However, preliminary calculations suggest a behaviour that is different to its chiral cousin. Understanding these differences will help us get to the bottom of the complex magnetic properties displayed by this new class of quantum spin chains. Therefore, we propose to use zero-field inelastic neutron scattering, below magnetic ordering temperatures Tc = 2.3 K, at LET to quantify the energy scales governing the magnetic properties and map the excitation spectra.
DOI: 10.15468/dl.59agtm
title: Occurrence Download

description: A dataset containing 152 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is Registros biológicos de plantaciones realizadas por el Jardín Botánico San Jorge en el área metropolitana de Ibagué - Tolima y área rural de Coello - Tolima, En el Marco del proyecto 180 Millones de arboles."
 ]
}

 The dataset includes 152 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0109247-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.3535/a74-d6t-cc6
title: Tripleurospermum inodorum (L.) Sch.-Bip

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/ypv-nav-ekf
title: Ranunculus villarsii DC.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310432
title: The nature of superconductivity in quasi-one-dimensional metal Rb2Mo3As3

description: The A2Mo3As3 (A=K, Rb, Cs) compounds are made of assembled Mo3As3 chains and are thus potential realizations of quasi-one-dimensional metals. Various experiments on these materials hint to Tomonaga-Luttinger liquid (TLL) physics, from which superconductivity with a relatively high critical temperature of Tc = 10.4 K emerges. However, the regime of effective interactions in the TLL and its relevance to superconductivity is not yet resolved due to the multiband nature of A2Mo3As3. The aim of this proposal is to measure muon transverse relaxation below Tc to determine the Cooper pairing symmetry and to check for possible time reversal symmetry breaking.
DOI: 10.5286/isis.e.rb2310432-1
title: The nature of superconductivity in quasi-one-dimensional metal Rb2Mo3As3

description: The A2Mo3As3 (A=K, Rb, Cs) compounds are made of assembled Mo3As3 chains and are thus potential realizations of quasi-one-dimensional metals. Various experiments on these materials hint to Tomonaga-Luttinger liquid (TLL) physics, from which superconductivity with a relatively high critical temperature of Tc = 10.4 K emerges. However, the regime of effective interactions in the TLL and its relevance to superconductivity is not yet resolved due to the multiband nature of A2Mo3As3. The aim of this proposal is to measure muon transverse relaxation below Tc to determine the Cooper pairing symmetry and to check for possible time reversal symmetry breaking.
DOI: 10.5286/isis.e.rb2310670-1
title: Mechanistic Understanding of Creep-Fatigue led Degradation of ODS Steels in Tension and Compression Hold

description: The Oxide Dispersion Strengthening (ODS) Steels are candidate materials for future nuclear reactors such as in the cladding and tubing of high-temperature Gen IV fission reactors, and in the blanket surrounding the vessel of fusion reactors. The ODS steels with added nano-size yttrium oxides (Y2O3) provide resistance against irradiation, creep, and swelling. Continuous exposure of high dose neutron irradiation and combined cycle loading at high temperatures transform the nanoparticles into new complex oxides which degrades the mechanical properties and irradiation resistance. In this work, the effects of tensile and compressive creep hold on the ODS steels produced from mechanical alloying are being investigated to underpin the consolidation process capable of safeguarding the use of ODS steel in the nuclear reactor life cycle resisting ageing without altering the mechanical properties. The insitu lattice strain data in creep-fatigue loading will enable us to understand the root cause of the different degradation mechanisms in ODS steels in tensile and compressive creep hold environments.
DOI: 10.3535/1z7-zgp-0rf
title: Plantae

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/a2q-rny-wkn
title: Ranunculus polyanthemos subsp. thomasii (Ten.) Tutin

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220284-2
title: Elucidating Photochromic Behaviour of Photoswitchable Metal-Organic Framework Composites (Guest@MOF) via INS with In Situ Illumination
DOI: 10.5286/isis.e.rb2310670
title: Mechanistic Understanding of Creep-Fatigue led Degradation of ODS Steels in Tension and Compression Hold

description: The Oxide Dispersion Strengthening (ODS) Steels are candidate materials for future nuclear reactors such as in the cladding and tubing of high-temperature Gen IV fission reactors, and in the blanket surrounding the vessel of fusion reactors. The ODS steels with added nano-size yttrium oxides (Y2O3) provide resistance against irradiation, creep, and swelling. Continuous exposure of high dose neutron irradiation and combined cycle loading at high temperatures transform the nanoparticles into new complex oxides which degrades the mechanical properties and irradiation resistance. In this work, the effects of tensile and compressive creep hold on the ODS steels produced from mechanical alloying are being investigated to underpin the consolidation process capable of safeguarding the use of ODS steel in the nuclear reactor life cycle resisting ageing without altering the mechanical properties. The insitu lattice strain data in creep-fatigue loading will enable us to understand the root cause of the different degradation mechanisms in ODS steels in tensile and compressive creep hold environments.
DOI: 10.5286/isis.e.rb2320277-2
title: The Zero-field Magnetic Structures of DyV6Sn6

description: REV6Sn6 (RE = Gd-Tm) are a family of magnetic materials which provide a new opportunity to study the combination of geometrically frustrated magnetism (of the rare earth lattice) with the exotic physics associated with non-magnetic V kagome layers. Our studies focus on DyV6Sn6 in which our preliminary characterisation shows evidence for two magnetic phases below the ordering temperature in zero-field, of which the magnetic structures are unknown. Additionally, it is currently ambiguous as to whether the magnetic interactions are principally antiferromagnetic or ferromagnetic in this material. Neutron diffraction provides the most comprehensive method to establish the magnetic structures and the nature of the magnetic interactions, which are considered essential for the development of a complete understanding of the physics of this important new class of materials.
DOI: 10.3535/bgh-dpy-8ec
title: Ranunculus millefoliatus Vahl

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220284
title: Elucidating Photochromic Behaviour of Photoswitchable Metal-Organic Framework Composites (Guest@MOF) via INS with In Situ Illumination

description: We propose to employ the TOSCA spectrometer coupled with in-situ ultraviolet (UV) illumination to perform inelastic neutron scattering (INS) of a new family of photochromic metal-organic framework materials, termed “PG@MOF” composites. The objectives are summarised below. (i) To determine the broadband vibrational spectra of the photochromic MOF composites encapsulating a photoswitchable photochromic guest (PG) molecule. (ii) To investigate how the THz dynamics of the MOF cage may be affected by photoswitching of PG subject to in-situ UV illumination. (iii) To understand the nature of guest-host interactions under nanoscale confinement. The results will pave the way to new understanding of novel photoswitchable composites for engineering smart sensors and lighting applications.
DOI: 10.5286/isis.e.rb2320052-1
title: Exploration of lattice-defect-induced Dzyaloshinskii-Moriya interaction in high-pressure torsion iron

description: Polarized SANS will be performed to disclose the Dzyaloshinskii-Moriya interaction (DMI) induced by the high-density of crystal defects in ferromagnets strained via high-pressure torsion (HPT). Supported by micromagnetic theory, the properties and structural parameters of the defect-induced DMI are estimated from the analysis of polarization-dependent chiral scattering patterns. The obtained results will provide a novel approach to control spin textures via the DMI.
DOI: 10.3535/1rj-ba3-hhl
title: Ranunculus millefoliatus Vahl

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/fy4-hhx-r17
title: Orchis sambucina L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310284
title: Palladium deuteride: neutrons versus DFT

description: We recently compared the atomic volume of H in PdHx, calculated with popular DFT schemes assuming purely octahedral (O) interstitial occupancy, to that obtained by neutron diffraction for x&lt;0.8. Significant disagreement was revealed between theory/modelling based on H/D O-only occupancy and experiment. The DFT-calculated rate of lattice expansion for tetrahedral (T) occupancy is significantly higher than for O, suggesting a choice between two controversial possibilities: either there is no T occupancy and "standard" DFT - as applied to Pd-H2 for 50 years - does not work, or there is partial T occupancy at the 10-20% level. This proposal aims to explore D concentrations x&gt;0.6. This will extend the range of available experimental data from neutrons and so bolster the comparison with DFT. Secondly, the measurements should reveal the mix of O and T (if any) occupancy at high x values.
DOI: 10.5286/isis.e.rb2310284-1
title: Palladium deuteride: neutrons versus DFT

description: We recently compared the atomic volume of H in PdHx, calculated with popular DFT schemes assuming purely octahedral (O) interstitial occupancy, to that obtained by neutron diffraction for x&lt;0.8. Significant disagreement was revealed between theory/modelling based on H/D O-only occupancy and experiment. The DFT-calculated rate of lattice expansion for tetrahedral (T) occupancy is significantly higher than for O, suggesting a choice between two controversial possibilities: either there is no T occupancy and "standard" DFT - as applied to Pd-H2 for 50 years - does not work, or there is partial T occupancy at the 10-20% level. This proposal aims to explore D concentrations x&gt;0.6. This will extend the range of available experimental data from neutrons and so bolster the comparison with DFT. Secondly, the measurements should reveal the mix of O and T (if any) occupancy at high x values.
DOI: 10.5286/isis.e.rb2320052
title: Exploration of lattice-defect-induced Dzyaloshinskii-Moriya interaction in high-pressure torsion iron

description: Polarized SANS will be performed to disclose the Dzyaloshinskii-Moriya interaction (DMI) induced by the high-density of crystal defects in ferromagnets strained via high-pressure torsion (HPT). Supported by micromagnetic theory, the properties and structural parameters of the defect-induced DMI are estimated from the analysis of polarization-dependent chiral scattering patterns. The obtained results will provide a novel approach to control spin textures via the DMI.
DOI: 10.3535/42g-554-j5h
title: Ranunculus millefoliatus Vahl

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/qek-g2e-4dk
title: Asteraceae Dumort.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2300078
title: Disordered Materials (NIMROD) Xpress study of D2O and D2O/saline solutions of propranolol hydrochloride

description: Solution scattering measurements will be made for 200 mM and 70 mM solutions of h-propranolol hydrochloride dispersed in D2O and in 0.15 mM D2O/saline, in order to establish whether there are differences in the wide-angle scattering seen in the presence and absence of salt, and above and below the drug's critical micelle concentration (of ca. 100 mM).
DOI: 10.5286/isis.e.rb2300078-1
title: Disordered Materials (NIMROD) Xpress study of D2O and D2O/saline solutions of propranolol hydrochloride

description: Solution scattering measurements will be made for 200 mM and 70 mM solutions of h-propranolol hydrochloride dispersed in D2O and in 0.15 mM D2O/saline, in order to establish whether there are differences in the wide-angle scattering seen in the presence and absence of salt, and above and below the drug's critical micelle concentration (of ca. 100 mM).
DOI: 10.5286/isis.e.rb2390043-2
title: Neutron radiography of Rolls Royce fuel spray nozzles
DOI: 10.3535/0dy-db9-nf3
title: Orchis sambucina L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/qhy-slc-8ys
title: Ranunculus L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220135
title: Structure of spin excitations in hole-doped superconductor KFe2As2
DOI: 10.5286/isis.e.rb2220135-1
title: Structure of spin excitations in hole-doped superconductor KFe2As2
DOI: 10.5286/isis.e.rb2320213-1
title: Understanding thermo-responsive re-entrant phase behavior in nanoparticle-pluronic system.

description: The delicate interplay of different interactions in colloids gives rise to interesting re-entrant phase behavior, where the system undergoes a phase change and return to original phase with respect to a monotonic variation in a specific physicochemical parameter. The emergence of such phase transitions are usually beyond the generalized understanding of colloidal science and requires involvement of complex multi-body interactions. We have observed re-entrant liquid-liquid phase separation in silica nanoparticles-pluronic (triblock copolymer) suspension, where the system transforms from stable one-phase to two-phase (aggregate) and then return back to original phase on increasing temperature. The observed phase transition is reversible as well as thermo-responsive in nature, associated with lower consolute temperatures. We propose to carry out SANS measurements to study the evolution of structure and interactions, for determining the origin of such phase behaviour.
DOI: 10.3535/g0v-tzm-hgt
title: Dactylorhiza majalis subsp. lapponica (Laest. ex Hartm.) H.Sund.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/swl-hb6-wat
title: Dactylorhiza majalis subsp. lapponica (Laest. ex Hartm.) H.Sund.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310133
title: Magnetic Field Study on the Tc-coupled Spin Excitation in Spin-triplet Superconductor Candidate UTe2

description: UTe2 has drawn a lot of attention among the superconductivity (SC) community recently for the promising secondary evidence of spin-triplet Cooper pairing shown in this system through temperature-independent NMR Knight shift, the highly anisotropic and unusually large upper critical field, power-law behavior of the specific heat, and ferromagnetic spin fluctuation hinted by the magnetic susceptibility. Inelastic neutron scattering can provide information on the pairing mechanism by probing the low energy excitation due to the ferromagnetic spin fluctuations. Our previous experiments at CNCS on co-aligned UTe2 sample in its 0KL and HK0 plane showed rod-like magnetic excitations at Brillouin zone boundary which develop a spin gap and a spin resonance upon entering the SC state. To further investigate the cause of the spin resonance, we propose to study magnetic field effect on this excitation.
DOI: 10.5286/isis.e.rb2310133-1
title: Magnetic Field Study on the Tc-coupled Spin Excitation in Spin-triplet Superconductor Candidate UTe2

description: UTe2 has drawn a lot of attention among the superconductivity (SC) community recently for the promising secondary evidence of spin-triplet Cooper pairing shown in this system through temperature-independent NMR Knight shift, the highly anisotropic and unusually large upper critical field, power-law behavior of the specific heat, and ferromagnetic spin fluctuation hinted by the magnetic susceptibility. Inelastic neutron scattering can provide information on the pairing mechanism by probing the low energy excitation due to the ferromagnetic spin fluctuations. Our previous experiments at CNCS on co-aligned UTe2 sample in its 0KL and HK0 plane showed rod-like magnetic excitations at Brillouin zone boundary which develop a spin gap and a spin resonance upon entering the SC state. To further investigate the cause of the spin resonance, we propose to study magnetic field effect on this excitation.
DOI: 10.5286/isis.e.rb2320213
title: Understanding thermo-responsive re-entrant phase behavior in nanoparticle-pluronic system.

description: The delicate interplay of different interactions in colloids gives rise to interesting re-entrant phase behavior, where the system undergoes a phase change and return to original phase with respect to a monotonic variation in a specific physicochemical parameter. The emergence of such phase transitions are usually beyond the generalized understanding of colloidal science and requires involvement of complex multi-body interactions. We have observed re-entrant liquid-liquid phase separation in silica nanoparticles-pluronic (triblock copolymer) suspension, where the system transforms from stable one-phase to two-phase (aggregate) and then return back to original phase on increasing temperature. The observed phase transition is reversible as well as thermo-responsive in nature, associated with lower consolute temperatures. We propose to carry out SANS measurements to study the evolution of structure and interactions, for determining the origin of such phase behaviour.
DOI: 10.3535/g4l-g6p-abj
title: Dactylorhiza incarnata subsp. cruenta (O.F.Müll.) P.D.Sell

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/h06-t97-9s2
title: Asteraceae Dumort.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310485
title: Elucidating deformation mechanism transitions in single crystal superalloys

description: The deformation behaviour of single crystal Ni-based superalloys exhibits sensitivity to crystallographic orientation, strain rate and temperature. Recent studies have identified conditions under which transitions between deformation mechanisms occur, but their compositional dependency and the relation between micromechanical and bulk properties remain unexplained. This proposed experiment will perform in situ tensile deformation of three superalloys that show differing mechanical behaviour to track the resultant lattice rotation, strain partitioning, lattice misfit and stress localisation. These data will unambiguously identify the deformation transitions and, alongside TEM analysis, will elucidate the governing mechanisms.
DOI: 10.5286/isis.e.rb2310485-1
title: Elucidating deformation mechanism transitions in single crystal superalloys

description: The deformation behaviour of single crystal Ni-based superalloys exhibits sensitivity to crystallographic orientation, strain rate and temperature. Recent studies have identified conditions under which transitions between deformation mechanisms occur, but their compositional dependency and the relation between micromechanical and bulk properties remain unexplained. This proposed experiment will perform in situ tensile deformation of three superalloys that show differing mechanical behaviour to track the resultant lattice rotation, strain partitioning, lattice misfit and stress localisation. These data will unambiguously identify the deformation transitions and, alongside TEM analysis, will elucidate the governing mechanisms.
DOI: 10.5286/isis.e.rb2320187-2
title: Pumping lipids across the gram-negative envelope

description: The PqiABC complex has been implicated in phospholipid (PL) transport between the inner and outer membrane of gram-negative bacteria. This one complex spans the periplasm with components in both membranes, tethering them together. In a recent experiment, RB2220703, we proposed utilising this trans-envelope complex as a scaffold to create a planar double membrane architecture, providing a unique gram-negative envelope mimetic to probe envelope biology. Our Preliminary Neutron Reflectometry (NR) experiments confirmed its successful creation. Furthermore, we predicted PqiABC to be a proton motive force (PMF) driven PL pump based on structural homology. By altering the buffer pH, we were able to emulate the PMF leading to a time dependent drop in the Scattering Length Density of the bilayer attached to the solid support. Suggestive of influx of hydrogenous material into the membrane, consistent with PMF driven PL transport. We have known for 40 years that PLs are transported to the outer membrane via a PMF mediated process. However, to date, no process has been identified. Our results provide tentative clues that PqiABC may be responsible. In this proposal we want to probe the system further and understand phospholipid selectivity.
DOI: 10.3535/9hy-wyg-yve
title: Asteraceae Dumort.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220264-2
title: First and Second Order Phase Transitions in Glyphosate at High Pressure
DOI: 10.5286/isis.e.rb2390130
title: Crystal Field investigation in Sm_{x}Y_{1-x}Co5
DOI: 10.5286/isis.e.rb2390130-1
title: Crystal Field investigation in Sm_{x}Y_{1-x}Co5
DOI: 10.3535/jcc-n3z-lw8
title: Ranunculus sprunerianus Boiss.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/jrb-p9t-vd9
title: Dactylorhiza majalis subsp. lapponica (Laest. ex Hartm.) H.Sund.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220155
title: Interfacial contribution to the measured spin Seebeck effect in La0.7Ca0.3MnO3 thin films
DOI: 10.5286/isis.e.rb2220155-1
title: Interfacial contribution to the measured spin Seebeck effect in La0.7Ca0.3MnO3 thin films