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Incommensurate Antiferromagnetism in the Extended t-J Model |
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| Authors: | LIANG Ying MA Tian-Xing FENG Shi-ping CHEN Wei-Yeu |
| Affiliation: | Department of Physics and Key Laboratory of Beam Technology and Material Modification, Beijing Normal University, Beijing 100875, China;National Laboratory of Superconductivity, Academia Sinica, Beijing 100080, China Department of Physics and Key Laboratory of Beam Technology and Material Modification, Beijing Normal University, Beijing 100875, China;National Laboratory of Superconductivity, Academia Sinica, Beijing 100080, China Department of Physics and Key Laboratory of Beam Technology and Material Modification, Beijing Normal University, Beijing 100875, China;National Laboratory of Superconductivity, Academia Sinica, Beijing 100080, China Department of Physics, Tamkang University, Tamsui 25137, Taiwan |
| Abstract: | The effect of the extra second neighbor hopping t' on the incommensurate spin correlation in the t-J modelin the underdoped regime is studied within the fermion-spin theory. It is shown that although the extra second neighborhopping t' is systematically accompanied with the increasing of the weight of the incommensurate peaks in the dynamicalspin structure factor, for the physical reasonable small value of t' the qualitative behavior of the incommensurate spincorrelation in the t-t'-J model is the same as in the case of t-J model. |
| Keywords: | incommensurate antiferromagnetism t-J model fermion-spin theory |
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