Unusual Charge Transport and Spin Response of Doped Bilayer Triangular Antiferromagnets  

作　　者：LIANGying MATian-Xing FENGShi-Ping 

机构地区：[1]DepartmentofPhysics,BeijingNormalUniversity,Beijing100875,China [2]DepartmentofPhysicsandKeyLaboratoryofBeamTechnologyandMaterialmodification,BeijingNormaluniversity,Beijing100875,China InterdisciplinaryCenterofTheoreticalStudies,AcademiaSinica,Beijing100080,China NationalLaboratoryo

出　　处：《Communications in Theoretical Physics》2003年第6期749-756,共8页理论物理通讯（英文版）

基　　金：国家自然科学基金，科技部专项基金

摘　　要：Within the t-J model, the charge transport and spin response of the doped bilayer triangular antiferromagnetare studied by considering the bilayer interaction. Although the bilayer interaction leads to the band splitting in theelectronic structure, the qualitative behaviors of the physical properties are the same as in the single layer case. Theconductivity spectrum shows the low-energy peak and unusual midinfrared band, the temperature-dependent resistivityis characterized by the nonlinearity metallic-like behavior in the higher temperature range and the deviation from themetallic-like behavior in the lower temperature range and the commensurate neutron scattering peak near the half-fillingis split into six incommensurate peaks in the underdoped regime, with the incommensurability increasing with the holeconcentration at lower dopings, and saturating at higher dopings.

关 键 词：charge transport spin response t-J model 

分 类 号：O482.5[理学—固体物理] TM271.6[理学—物理]