Ultrafast dissolution and creation of bonds in IrTe2 induced by photodoping

被引:21
作者
Ideta, Shin-ichiro [1 ,2 ,3 ,10 ]
Zhang, Dongfang [1 ,2 ,11 ]
Dijkstra, Arend G. [1 ,2 ,4 ,5 ]
Artyukhin, Sergey [6 ]
Keskin, Sercan [1 ,2 ,12 ]
Cingolani, Roberto [6 ]
Shimojima, Takahiro [3 ]
Ishizaka, Kyoko [3 ]
Ishii, Hiroyuki [7 ]
Kudo, Kazutaka [7 ]
Nohara, Minoru [7 ]
Miller, R. J. Dwayne [1 ,2 ,8 ,9 ]
机构
[1] Max Planck Inst Struct & Dynam Matter, Luruper Chaussee 149, D-22761 Hamburg, Germany
[2] Hamburg Ctr Ultrafast Imaging, Luruper Chaussee 149, D-22761 Hamburg, Germany
[3] Univ Tokyo, Quantum Phase Elect Ctr, Dept Appl Phys, Tokyo 1138656, Japan
[4] Univ Leeds, Sch Chem, Leeds LS2 9JT, W Yorkshire, England
[5] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England
[6] Italian Inst Technol, Via Morego 30, I-16163 Genoa, Italy
[7] Okayama Univ, Res Inst Interdisciplinary Sci, Okayama 7008530, Japan
[8] Univ Toronto, Dept Chem, 80 St George St, Toronto, ON M5S 3H6, Canada
[9] Univ Toronto, Dept Phys, 80 St George St, Toronto, ON M5S 3H6, Canada
[10] IMS, Okazaki, Aichi 4448585, Japan
[11] Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany
[12] Leibniz Inst New Mat, INM, D-66123 Saarbrucken, Germany
基金
日本学术振兴会;
关键词
CHARGE; TRANSITIONS; ELECTRON; PHASE;
D O I
10.1126/sciadv.aar3867
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The observation and control of interweaving spin, charge, orbital, and structural degrees of freedom in materials on ultrafast time scales reveal exotic quantum phenomena and enable new active forms of nanotechnology. Bonding is the prime example of the relation between electronic and nuclear degrees of freedom. We report direct evidence illustrating that photoexcitation can be used for ultrafast control of the breaking and recovery of bonds in solids on unprecedented time scales, near the limit for nuclear motions. We describe experimental and theoretical studies of IrTe2 using femtosecond electron diffraction and density functional theory to investigate bonding instability. Ir-Ir dimerization shows an unexpected fast dissociation and recovery due to the filling of the antibonding d(xy) orbital. Bond length changes of 20% in IrTe2 are achieved by effectively addressing the bonds directly through this relaxation process. These results could pave the way to ultrafast switching between metastable structures by photoinduced manipulation of the relative degree of bonding in this manner.
引用
收藏
页数:7
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