National Changhua University of Education Institutional Repository : Item 987654321/16572

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NCUEIR > College of Science > Department of Physics > Periodical Articles > Item 987654321/16572

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/16572

Title:	Supersymmetric Mean-field Theory of the t-J Model
Authors:	Cheng, Chi-Ho;Ng, Tai-Kai
Contributors:	物理學系
Date:	2000-10
Issue Date:	2013-05-28T07:11:37Z
Publisher:	EDP Sciences
Abstract:	The supersymmetric formulation of the t-J model is studied in this paper at the mean-field level where the δ-T phase diagram is determined. We found that the slave-fermion–like spiral phase is stable at low dopingconcen tration, and the slave-boson–like d-wave fermionic spin pairingstate becomes energetically favourable when δ ≥ 0.23. An improvement in free energy usingGutzwiller’s method lowers the transition dopingconcen tration to δ 0.06. We also point out the existence of new branches of excitations in the supersymmetric theory.
Relation:	Europhysis Letters, 52(1): 87-93
Appears in Collections:	[Department of Physics] Periodical Articles

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