教師資料查詢 | 類別: 期刊論文 | 教師: 李啟正 LEE, CHI-CHENG (瀏覽個人網頁)

標題: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.
關鍵字
語言英文(美國)
ISSN
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別美國
公開徵稿
出版型式,電子版
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