Coupling of spin and orbital excitations in the iron-based superconductor FeSe0.5Te0.5
學年 98
學期 2
出版（發表）日期 2010-06-14
作品名稱 Coupling of spin and orbital excitations in the iron-based superconductor FeSe0.5Te0.5
作品名稱（其他語言）
著者 S.-H. Lee; Guangyong Xu; W. Ku; J. S. Wen; C. C. Lee; N. Katayama; Z. J. Xu; S. Ji; Z. W. Lin; G. D. Gu; H.-B. Yang; P. D. Johnson; Z.-H. Pan; T. Valla; M. Fujita; T. J. Sato; S. Chang; K. Yamada; J. M. Tranquada
單位
出版者
著錄名稱、卷期、頁數 Phys. Rev. B 81(22), 220502(R)
摘要 We present a combined analysis of neutron scattering and photoemission measurements on superconducting FeSe0.5Te0.5. The low-energy magnetic excitations disperse only in the direction transverse to the characteristic wave vector (12,0,0) whereas the electronic Fermi surface near (12,0,0) appears to consist of four incommensurate pockets. While the spin resonance occurs at an incommensurate wave vector compatible with nesting, neither spin-wave nor Fermi-surface-nesting models can describe the magnetic dispersion. We propose that a coupling of spin and orbital correlations is key to explaining this behavior. If correct, it follows that these nematic fluctuations are involved in the resonance and could be relevant to the pairing mechanism.
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語言 en_US
ISSN
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 是
國別 USA
公開徵稿
出版型式 ,電子版
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機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/117393 )