What really occurs in the dynamical
process of the PIPT
instrongly correlated soft crystals?

Shin-ya KOSHIHARAFRC Tokyo Tech. & ERATO, JSTAcknowledgements• JASRI/SPring-8: use of the CCD detector(marccd165)• RIKEN/SPring-8: use of the pulsed YAG laser
system (PowerLite8000)• SUNY Buffalo: use of the heat-load chopper• Structural Biology Group, Photon Factory:
use of cryogenic systems

KEKCo-workers–––––––

Hiroshi Sawa
Hiroshi Kawata
Takeharu Mori
Shigeru YamamotoKimichika Tsuchiya
Tatsuro Shioyaand all Photon FactoryStaffs
TITECH/ERATO– Ken Onda
– Tadahiko Ishikawa– Yoichi Okimoto– Mitsuru Ito– Desheng Fu– M.Ito GroupTohoku Univ.
– Takahisa Arima
The Univ. of Tokyo– Kenjiro Miyano
Kyoto Univ.
- Hideki Yamochi &Gunji Saito Group•

Korea Advanced Institute of Science andTechnology (KAIST) (Korea)– Hyotcherl Ihee•

The Univ. of Chicago (USA)– Keith Moffat•

Univ. Rennes 1 (France)– Eric Collet– Herve Cailleau•

Oxford Univ. (UK) and Max Planck (Hamburg)– Andrea Cavalleri•

UC Berkley (USA)– Robert Schoenlein•

The Univ. of Copenhagen (Denmark)– Martin Nielsen•

State University of New York at Buffalo (USA)– Philip Coppens– Milan Gembicky

Mission of my talk
From the view point of‘strongly correlated soft materials science’,what can (will?) be realizedby pump-probe experiments‘based on new light source’ in IMSS?
Examples
1. Laser-SR Technology has really opened the door for new
phenomena in correlated soft materials(Melting of the Iced Charge;CO in EDO (THz) andNSMO (X-ray))
2. Laser-SR technology has kicked off the “soft materials
dynamics” for molecular (CO) transport based on dynamicalstructure(Molecular Movie of Mb)

Important Merit of Strongly Correlated Soft Materials :Artificial control of the phase of materials by dynamical way.
(Photonic Cooperativity : Photo-Induced Phase Transition, PhotoDomino)

Why Attractive？

１：Highly Sensitive (Cooperative control)
２：Very fast and Exotic Response,
It expands from fs-Ms, according to the kind of
combined excitation,(Charge(Spin)-Lattice excitation ?
transport in protein and/or other molecules? )Lattice (Electronic, Magnetic)
Relaxation

TransientstateNew
LatticeStructureandElectronicOrder

False
Ground State

GroundState
NanometricTime
Scale

fs: Electronic ps: Phonon
ns-Ms: Combined with movement of atomicsystems
Self-amplification of excited state(Theoretical expectation, K. Nasu (2001))

Basic Problem :PIPT can realize what cannot be achieved by thermodynamics?

Why (EDO)2PF6 is important for the study of Photo-Domino effect?

Is it really I-M transition ?
Domino effect due tocooperativityhn

Cooperative melting ofelectreon-lattice
280 K

LocalizedCooperative

M.Chollet et.al., Science 307 (2005) 86.

100fs time-resolved reflection spectrain wide photon (VIS-THz) energy region
K.Onda et.al. (PRL 101, 067403 (2008))

Photoinduced
Phase (0101)*
to{1010}+ +1 +00+1hn(1010)=to{0200}

Conversion from (0110) toside view of EDO-TTF(0101) Charge
Disproportionation Patternto{0110}(0110)+0 +1 +1 +0K.Onda(Tokyo Tech.)+0.5+0.5+0.5+0.5

S.Ogihara

DTLow Temp. Phase (0110)

High Temp. Phase(0.5,0.5,0.5,0.5)

PIPT phase cannot be achieved by thermal excitation
False Ground State ! （Collaboration with Prof. Yonemitsu G.)

Laser-SR technology (Molecular Movie) has kicked off
the new materials based on dynamical structure

Nozawa et al. (2007) J. Synchrotron Rad. 14, 313.

Co oxides with Perovskite structure: Pr1/2Ca1/2CoO3(Estimation of the speed of the photo-induced M-I domain wall basedon the direct observation of movement of it）
Transport property
M-I transition around 90 K
The first oreder phase ransition withhysteresis

RCoO3:R

TypicalPerovskiteStructure:Co:OY.OkimotoM. Itoh et al, physica B vol. 25 p. 902, 1999A.Tomita

Slow Concordant Dynamics in
Whole Units of Myoglobin
Accompanied with
Ligand Migration Cavity 4
A.Tomita et al.

S.Adachi(Xe4)
Cavity 2(Xe2)

Cavity 1(Xe1)

Cavity 3(Xe3)

T=120KSubnanosecond-resolved 2Fo-Fc mapof photolysed myoglobin-CO contoured at 0.8s
L29

H64

Blue: Laser OFF
Green: Laser ON, +300 ps

V68
HEME

H93

Initial stage of slow
PIPT has electronic
origin.

New structural science is surely
stimulating materials scientists

Materials
Designe-e Correlatione-e long correlatione-l correlationmolecular transport

Combination
with dynamical
SX, neutron andNMR will bekey！

Materials
Synthesis
CT Complexes
CO Soft Systems
Quantum Para
（PRL 100, 227601 2008)

Mb:Protein

Materials
Characterization(Facility science)

PIPT and Photo-ferro(Science 300, 613 2003)

CO and Ultrafast PIPT
Giant Piezo

Concordant breathing motion

Thank you for your attention !
CM: Yamada Conf. for PIPT
Nov. 11-15, 2008 in Osaka,
Please visit our Home-page :http://www.pipt.jp