Nature of spin excitations in two dimensional Mott insulators : Undoped cuprates and other materials
學年 89
學期 2
出版（發表）日期 2001-02-01
作品名稱 Nature of spin excitations in two dimensional Mott insulators : Undoped cuprates and other materials
作品名稱（其他語言）
著者 Ho, Chang-ming; Muthukumar, V. N.; Ogata, M.; Anderson, P. W.
單位 淡江大學物理學系
出版者 College Park: American Physical Society
著錄名稱、卷期、頁數 Physical Review Letters 86(8), pp.1626-1629
摘要 We investigate the excitation spectrum of a two-dimensional resonating valence bond (RVB) state. Treating the pi-flux phase with antiferromagnetic correlations as a variational ground state, we recover the long wavelength magnon as an "RVB exciton." However, this excitation does not exhaust the entire spectral weight and the high-energy spectrum is dominated by fermionic excitations. The latter can be observed directly by inelastic neutron scattering, and we predict their characteristic energy scales along different high symmetry directions in the magnetic Brillouin zone. We also interpret experimental results on two magnon Raman scattering and midinfrared absorption within this scenario.
關鍵字
語言 en
ISSN 1079-7114 0031-9007
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度
國別 USA
公開徵稿
出版型式 紙本 電子版
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