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Neutron scattering signatures of the 3D hyperhoneycomb Kitaev quantum spin liquid

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Title: Neutron scattering signatures of the 3D hyperhoneycomb Kitaev quantum spin liquid
Authors: Smith, A
Knolle, J
Kovrizhin, DL
Chalker, JT
Moessner, R
Item Type: Journal Article
Abstract: Motivated by recent synthesis of the hyperhoneycomb material β − Li 2 IrO 3 , we study the dynamical structure factor (DSF) of the corresponding 3D Kitaev quantum spin-liquid (QSL), whose fractionalized degrees of freedom are Majorana fermions and emergent flux loops. The properties of this 3D model are known to differ in important ways from those of its 2D counterpart—it has a finite-temperature phase transition, as well as distinct features in the Raman response. We show, however, that the qualitative behavior of the DSF is broadly dimension-independent. Characteristics of the 3D DSF include a response gap even in the gapless QSL phase and an energy dependence deriving from the Majorana fermion density of states. Since the majority of the response is from states containing a single Majorana excitation, our results suggest inelastic neutron scattering as the spectroscopy of choice to illuminate the physics of Majorana fermions in Kitaev QSLs.
Issue Date: 11-Nov-2015
Date of Acceptance: 21-Aug-2015
URI: http://hdl.handle.net/10044/1/54767
DOI: https://dx.doi.org/10.1103/PhysRevB.92.180408
ISSN: 1098-0121
Publisher: American Physical Society
Journal / Book Title: Physical review B: Condensed matter and materials physics
Volume: 92
Issue: 18
Copyright Statement: Neutron scattering signatures of the 3D hyperhoneycomb Kitaev quantum spin liquid A. Smith, J. Knolle, D. L. Kovrizhin, J. T. Chalker, and R. Moessner Phys. Rev. B 92, 180408(R) – Published 11 November 2015. ©2015 American Physical Society
Keywords: Science & Technology
Physical Sciences
Physics, Condensed Matter
Physics
VALENCE-BOND
ANTIFERROMAGNETS
STATES
MODEL
cond-mat.str-el
Publication Status: Published
Article Number: 180408
Appears in Collections:Condensed Matter Theory
Physics
Faculty of Natural Sciences



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