Orbital magnetic field effects in Mott insulators with strong spin-orbit coupling

被引：7

作者：

Natori, Willian M. H. ^{[1
]}

Moessner, Roderich ^{[2
]}

Knolle, Johannes ^{[1
]}

机构：

[1] Imperial Coll London, Blackett Lab, London SW7 2AZ, England

[2] Max Planck Inst Phys Komplexer Syst, Nothnitzer Str 38, D-01187 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2019年 / 100卷 / 14期

关键词：

HUBBARD-MODEL; EXCHANGE; LIQUIDS; PHYSICS;

D O I：

10.1103/PhysRevB.100.144403

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the effect of a magnetic field on the low-energy description of Mott insulators with strong spin-orbit (SO) coupling. In contrast to the standard case of the Hubbard model without SO coupling, we show that Peierls phases can modulate the magnetic exchange at leading order in the interaction. Our mechanism crucially depends on the existence of distinct exchange paths between neighboring magnetic ions enclosing a well-defined area. Thus it will generically be present in any solid state realization of the Kitaev model and its extensions. We explicitly calculate the variation of the exchange constants of the so-called JK Gamma model as a function of the magnetic flux. We discuss experimental implications of our findings for various settings of candidate Kitaev spin liquids.

引用

页数：6

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