Signatures of magnetic-field-driven quantum phase transitions in the entanglement entropy and spin dynamics of the Kitaev honeycomb model

Ronquillo, David C.; Vengal, Adu; Trivedi, Nandini

doi:10.1103/physrevb.99.140413

Title: Signatures of magnetic-field-driven quantum phase transitions in the entanglement entropy and spin dynamics of the Kitaev honeycomb model

Journal Article · 29 April 2019 · Physical Review. B

DOI: https://doi.org/10.1103/physrevb.99.140413 · OSTI ID:1609874

Ronquillo, David C. ^[1]; Vengal, Adu ^[1]; Trivedi, Nandini ^[1]

The Ohio State Univ., Columbus, OH (United States)

The main question we address is how to probe the fractionalized excitations of a quantum spin liquid (QSL), for example, in the Kitaev honeycomb model. Here, by analyzing the energy spectrum and entanglement entropy, for antiferromagnetic couplings and a field along either [111] or [001], we find a gapless QSL phase sandwiched between the non-Abelian Kitaev QSL and polarized phases. Increasing the field strength towards the polarized limit destroys this intermediate QSL phase, resulting in a considerable reduction in the number of frequency modes and the emergence of a beating pattern in the local dynamical correlations, possibly observable in pump-probe experiments.

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Research Organization:: The Ohio State Univ., Columbus, OH (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-07ER46423

OSTI ID:: 1609874

Alternate ID(s):: OSTI ID: 1509762

Journal Information:: Physical Review. B, Vol. 99, Issue 14; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 22 works

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