Doping and temperature dependence of incommensurate antiferromagnetism in underdoped lanthanum cuprates

被引:19
|
作者
Yuan, F [1 ]
Feng, SP
Su, ZB
Yu, L
机构
[1] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China
[2] Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
[3] Acad Sinica, Natl Lab Superconduct, Beijing 100080, Peoples R China
[4] Abdus Salam Int Ctr Theoret Phys, I-34014 Trieste, Italy
关键词
D O I
10.1103/PhysRevB.64.224505
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The doping, temperature, and energy dependence of the dynamical spin structure factors of the underdoped lanthanum cuprates in the normal state are studied within the t-J model using the fermion-spin transformation technique. Incommensurate peaks are found at [(1 +/- delta) pi, pi], [pi, (1 +/- delta) pi] at relatively low temperatures, with delta linearly increasing with doping at the beginning and then saturating at higher dopings, These peaks broaden and weaken in amplitude with temperature and energy, in good agreement with experiments. The theory also predicts a rotation of these peaks by pi /4 at even higher temperatures, being shifted to [(1 +/- delta/ root2)pi, (1 +/- delta/ root2)delta].
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页数:5
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