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寇谡鹏

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期刊论文

Quantum Non-Magnetic state near Metal-Insulator Transition-a Possible Candidate of Spin Liquid State

寇谡鹏Gao-Yong Sun and Su-Peng Kou

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摘要/描述

In this paper, based on the formulation of O (3) non-linear model, we study two dimensional−flux Hubbard model at half-filling. A quantum non-magnetic insulator is explored near metalinsulator transition that may be a possible candidate of spin liquid state. Such quantum nonmagnetic insulator on square lattice is not induced by frustrations. Instead, it originates from quantum spin fluctuations with relatively small e ective spin-moments. In the strong coupling limit, our results of spin velocity and spin order parameter agree with results obtained from earlier calculations.

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版权说明:以下全部内容由寇谡鹏上传于   2010年01月04日 14时27分12秒,版权归本人所有。

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