Electronic and lattice structures in SmFeAsO1-x Fx probed by x-ray absorption spectroscopy

C. J. Zhang, H. Oyanagi, Z. H. Sun, Yoichi Kamihara, H. Hosono

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Local lattice and electronic structures in the Fe-As layer of SmFeAsO 1-x Fx superconductors were studied by x-ray absorption spectroscopy, the FeK -edge and the AsK -edge extended x-ray absorption fine-structure, and x-ray absorption near-edge-structure experiments, respectively. Temperature-dependent local lattice distortions were observed in the Fe-As bond mean-square relative displacement of the superconducting samples. A strong coupling of the carrier-induced local lattice distortion (polaron) to the superconducting transition temperature in the oxypnictide superconductors is indicated. The near-edge spectra showed systematic temperature-dependent energy shifts, which indicate an intralayer electron redistribution from Fed states to Asp states due to orbital-selective band filling at low temperatures.

Original languageEnglish
Article number094516
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number9
DOIs
Publication statusPublished - 2010 Mar 17
Externally publishedYes

Fingerprint

Absorption spectroscopy
x ray absorption
x ray spectroscopy
absorption spectroscopy
electronic structure
X rays
Superconducting materials
Gene Conversion
Temperature
Superconducting transition temperature
Electronic structure
Electrons
fine structure
transition temperature
orbitals
temperature
shift
Experiments
electrons
energy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Electronic and lattice structures in SmFeAsO1-x Fx probed by x-ray absorption spectroscopy. / Zhang, C. J.; Oyanagi, H.; Sun, Z. H.; Kamihara, Yoichi; Hosono, H.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 81, No. 9, 094516, 17.03.2010.

Research output: Contribution to journalArticle

@article{d7054975f0af44fe9ea248015f0a59ae,
title = "Electronic and lattice structures in SmFeAsO1-x Fx probed by x-ray absorption spectroscopy",
abstract = "Local lattice and electronic structures in the Fe-As layer of SmFeAsO 1-x Fx superconductors were studied by x-ray absorption spectroscopy, the FeK -edge and the AsK -edge extended x-ray absorption fine-structure, and x-ray absorption near-edge-structure experiments, respectively. Temperature-dependent local lattice distortions were observed in the Fe-As bond mean-square relative displacement of the superconducting samples. A strong coupling of the carrier-induced local lattice distortion (polaron) to the superconducting transition temperature in the oxypnictide superconductors is indicated. The near-edge spectra showed systematic temperature-dependent energy shifts, which indicate an intralayer electron redistribution from Fed states to Asp states due to orbital-selective band filling at low temperatures.",
author = "Zhang, {C. J.} and H. Oyanagi and Sun, {Z. H.} and Yoichi Kamihara and H. Hosono",
year = "2010",
month = "3",
day = "17",
doi = "10.1103/PhysRevB.81.094516",
language = "English",
volume = "81",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "9",

}

TY - JOUR

T1 - Electronic and lattice structures in SmFeAsO1-x Fx probed by x-ray absorption spectroscopy

AU - Zhang, C. J.

AU - Oyanagi, H.

AU - Sun, Z. H.

AU - Kamihara, Yoichi

AU - Hosono, H.

PY - 2010/3/17

Y1 - 2010/3/17

N2 - Local lattice and electronic structures in the Fe-As layer of SmFeAsO 1-x Fx superconductors were studied by x-ray absorption spectroscopy, the FeK -edge and the AsK -edge extended x-ray absorption fine-structure, and x-ray absorption near-edge-structure experiments, respectively. Temperature-dependent local lattice distortions were observed in the Fe-As bond mean-square relative displacement of the superconducting samples. A strong coupling of the carrier-induced local lattice distortion (polaron) to the superconducting transition temperature in the oxypnictide superconductors is indicated. The near-edge spectra showed systematic temperature-dependent energy shifts, which indicate an intralayer electron redistribution from Fed states to Asp states due to orbital-selective band filling at low temperatures.

AB - Local lattice and electronic structures in the Fe-As layer of SmFeAsO 1-x Fx superconductors were studied by x-ray absorption spectroscopy, the FeK -edge and the AsK -edge extended x-ray absorption fine-structure, and x-ray absorption near-edge-structure experiments, respectively. Temperature-dependent local lattice distortions were observed in the Fe-As bond mean-square relative displacement of the superconducting samples. A strong coupling of the carrier-induced local lattice distortion (polaron) to the superconducting transition temperature in the oxypnictide superconductors is indicated. The near-edge spectra showed systematic temperature-dependent energy shifts, which indicate an intralayer electron redistribution from Fed states to Asp states due to orbital-selective band filling at low temperatures.

UR - http://www.scopus.com/inward/record.url?scp=77954924239&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77954924239&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.81.094516

DO - 10.1103/PhysRevB.81.094516

M3 - Article

VL - 81

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 9

M1 - 094516

ER -