Quantum electric dipoles in spin-liquid dimer Mott insulator κ-ET2Cu2(CN)3

被引：115

作者：

Hotta, Chisa ^{[1
]}

机构：

[1] Kyoto Sangyo Univ, Dept Phys, Fac Sci, Kyoto 6038555, Japan

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 24期

关键词：

TRIANGULAR-LATTICE; PHASE-DIAGRAM; NEEL ORDER; STATE; MODEL; KAPPA-(BEDT-TTF)(2)CU-2(CN)(3); PRESSURE;

D O I：

10.1103/PhysRevB.82.241104

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present an effective dipolar-spin model based on the strong coupling analysis, which may explain the possible origin of "spin-liquid insulator." The issue is related to a dimer Mott insulator reminiscent of an organic triangular lattice system, kappa-ET2Cu2(CN)(3), whose gapless spin-liquid state has been discussed in the context of geometrical frustration of exchange coupling, J, between spins on dimer orbitals. It turns out that another degrees of freedom within the insulator, quantum electric dipoles on dimers, interact with each other and modify J significantly through the dipolar-spin coupling, resulting in a possible "dipolar-spin liquid."

引用

页数：4

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