Importance of spin-orbit coupling in layered organic salts

被引：60

作者：

Winter, Stephen M. ^{[1
]}

Riedl, Kira ^{[1
]}

Valenti, Roser ^{[1
]}

机构：

[1] Goethe Univ Frankfurt, Inst Theoret Phys, D-60438 Frankfurt, Germany

来源：

PHYSICAL REVIEW B | 2017年 / 95卷 / 06期

基金：

加拿大自然科学与工程研究理事会;

关键词：

ANISOTROPIC SUPEREXCHANGE INTERACTION; FIELD-INDUCED GAP; FERMI-SURFACE; LIQUID; CONDUCTOR; PHASES; STATE;

D O I：

10.1103/PhysRevB.95.060404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the spin-orbit coupling (SOC) effects in alpha- and kappa-phase BEDT-TTF and BEDT-TSF organic salts. Contrary to the assumption that SOC in organics is negligible due to light C, S, and H atoms, we show the relevance of such an interaction in a few representative cases. In the weakly correlated regime, SOC manifests primarily in the opening of energy gaps at degenerate band touching points. This effect becomes especially important for Dirac semimetals such as alpha-(ET)(2)I-3. Furthermore, in themagnetic insulating phase, SOC results in additional anisotropic exchange interactions, which provide a compelling explanation for the puzzling field-induced behavior of the quantum spin-liquid candidate kappa-(ET)(2)Cu-2(CN)(3). We conclude by discussing the importance of SOC for the description of low-energy properties in organics.

引用

页数：6

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