title: Electronic and atomic structures of the Sr3Ir4Sn13single crystal: A possible charge density wave material.
abstract: X-ray scattering (XRS), x-ray absorption near-edge structure (XANES) and extended x-ray absorption fine structure (EXAFS) spectroscopic techniques were used to study the electronic and atomic structures of the high-quality Sr3Ir4Sn13(SIS) single crystal below and above the transition temperature (T*≈ 147 K). The evolution of a series of modulated satellite peaks below the transition temperature in the XRS experiment indicated the formation of a possible charge density wave (CDW) in the (110) plane. The EXAFS phase derivative analysis supports the CDW-like formation by revealing different bond distances [Sn1(2)-Sn2] below and above T*in the (110) plane. XANES spectra at the Ir L3-edge and Sn K-edge demonstrated an increase (decrease) in the unoccupied (occupied) density of Ir 5d-derived states and a nearly constant density of Sn 5p-derived states at temperatures T < T*in the (110) plane. These observations clearly suggest that the Ir 5d-derived states are closely related to the anomalous resistivity transition. Accordingly, a close relationship exists between local electronic and atomic structures and the CDW-like phase in the SIS single crystal.
authors.affiliation: Department of Physics, National Tsing Hua University, Hsinchu 300, Taiwan.
authors.forename: H-T
authors.initials: HT
authors.lastname: Wang
authors.affiliation: Department of Physics, Tamkang University, Tamsui 251, Taiwan.
authors.forename: M K
authors.initials: MK
authors.lastname: Srivastava
authors.affiliation: Department of Physics, Tamkang University, Tamsui 251, Taiwan.
authors.forename: C-C
authors.initials: CC
authors.lastname: Wu
authors.affiliation: Department of Physics, Tamkang University, Tamsui 251, Taiwan.
authors.forename: S-H
authors.initials: SH
authors.lastname: Hsieh
authors.affiliation: Department of Physics, Tamkang University, Tamsui 251, Taiwan.
authors.forename: Y-F
authors.initials: YF
authors.lastname: Wang
authors.affiliation: Department of Physics, Tamkang University, Tamsui 251, Taiwan.
authors.forename: Y-C
authors.initials: YC
authors.lastname: Shao
authors.affiliation: Department of Physics, Tamkang University, Tamsui 251, Taiwan.
authors.forename: Y-H
authors.initials: YH
authors.lastname: Liang
authors.affiliation: Department of Physics, Tamkang University, Tamsui 251, Taiwan.
authors.forename: C-H
authors.initials: CH
authors.lastname: Du
authors.affiliation: Department of Applied Physics, National University of Kaohsiung, Kaohsiung 811, Taiwan.
authors.forename: J-W
authors.initials: JW
authors.lastname: Chiou
authors.affiliation: National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan.
authors.forename: C-M
authors.initials: CM
authors.lastname: Cheng
authors.affiliation: National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan.
authors.forename: J-L
authors.initials: JL
authors.lastname: Chen
authors.affiliation: National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan.
authors.forename: C-W
authors.initials: CW
authors.lastname: Pao
authors.affiliation: National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan.
authors.forename: J-F
authors.initials: JF
authors.lastname: Lee
authors.affiliation: Department of Physics, National Cheng Kung University, Tainan 700, Taiwan.
authors.forename: C N
authors.initials: CN
authors.lastname: Kuo
authors.affiliation: Department of Physics, National Cheng Kung University, Tainan 700, Taiwan.
authors.forename: C S
authors.initials: CS
authors.lastname: Lue
authors.affiliation: Department of Physics, National Tsing Hua University, Hsinchu 300, Taiwan.|Institute of Physics, Academia Sinica, Taipei 115, Taiwan.
authors.forename: M-K
authors.initials: MK
authors.lastname: Wu
authors.affiliation: Department of Physics, Tamkang University, Tamsui 251, Taiwan.
authors.forename: W-F
authors.initials: WF
authors.lastname: Pong