Anisotropic behavior of thermal conductivity in the bose-einstein condensed state of the bond-alternating spin-chain system Pb2V 3O9

Mitsuhide Sato, Takayuki Kawamata, Kohki Naruse, Kazutaka Kudo, Norio Kobayashi, Yoji Koike

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

We have systematically measured the thermal conductivity along the [101], [101̄] and b* directions, κ[101̄], κ[101̄] and κb*, respectively, of the S = 1/2 bond-alternating spin-chain system Pb2V3O9 in magnetic fields parallel and perpendicular to the heat current. It has been found that κ[101] along the spin chains is markedly enhanced in the BEC state, which has been concluded to be due to the enhancement of the thermal conductivity due to triplons. Furthermore, it has been found that the enhancement of κ[101̄] in the BEC state is more marked in magnetic fields parallel to the [101] direction than perpendicular to the [101] direction. The BEC state may be weakened or broken in magnetic fields perpendicular to the [101] direction on account of the breaking of the rotational symmetry.

Original languageEnglish
Article number032079
JournalJournal of Physics: Conference Series
Volume400
Issue numberPART 3
DOIs
Publication statusPublished - 2012 Jan 1
Event26th International Conference on Low Temperature Physics, LT 2011 - Beijing, China
Duration: 2011 Aug 102011 Aug 17

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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