Evolution of spinon Fermi surface and magnetic response of hyperkagome spin liquids

被引：4

作者：

Forte, Filomena ^{[1
,2
]}

van den Brink, Jeroen ^{[3
]}

Cuoco, Mario ^{[1
,2
]}

机构：

[1] CNR SPIN, I-84084 Fisciano, SA, Italy

[2] Univ Salerno, Dipartimento Fis ER Caianiello, I-84084 Fisciano, SA, Italy

[3] IFW Dresden, Inst Theoret Solid State Phys, D-01171 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2013年 / 88卷 / 14期

关键词：

MOTT INSULATOR; PHYSICS;

D O I：

10.1103/PhysRevB.88.144422

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Quantum spin liquids are elusive states of matter that are characterized by a lack of long-range magnetic order, which renders their excitation spectra the key to identifying them. Studying the magnetic response of a class of spin-liquid states with fermionic spinons and broken time reversal symmetry (TRS) on the three-dimensional hyperkagome lattice of Na4Ir3O8, we demonstrate that the spinon Fermi surface has a topological transition as a function of the flux intensity generated by the spinons moving along loops within the unit cell. The spin dynamical structure factor reveals small pockets of gapped regions in energy and momentum existing below the topological transition and nondispersive high-intensity peaks which broaden when the TRS gets broken. These dynamical fingerprints closely track the nature of the spin-liquid ground state of Na4Ir3O8.

引用

页数：5

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