Single-crystal growth of Pb2V3O9 and the Bose-Einstein condensed state of triplons studied by thermal conductivity, specific heat and magnetization measurements

T. Kawamata, N. Sugawara, M. Uesaka, N. Kaneko, T. Kajiwara, H. Yamane, K. Koyama, Kazutaka Kudo, N. Kobayashi, Y. Koike

Research output: Contribution to journalArticle

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Abstract

We have succeeded in growing large-size single crystals of the quasi-one-dimensional S 1/2 spin-dimer system Pb2V3O 9 by the floating-zone method, and also investigated the thermal conductivity, specific heat and magnetization in magnetic fields. In high magnetic fields, it has been found that the suppression of the thermal conductivity by the application of magnetic field is relaxed. This behavior is caused by the enhancement of the thermal conductivity due to triplons and/or phonons owing to the extension of the mean free path of triplons and/or phonons in the Bose-Einstein condensed (BEC) state of field-induced triplons. We have estimated the critical field Hc(T) between the BEC state of triplons and the gapped normal state from the thermal conductivity, specific heat and magnetization measurements and obtained the value of the critical exponent oslash; ∼ 2.0 in [Hc(T) - Hc(0)] Tø using Hc(T)'s at low temperatures.

Original languageEnglish
Article number042087
JournalJournal of Physics: Conference Series
Volume150
Issue number4
DOIs
Publication statusPublished - 2009
Externally publishedYes

Fingerprint

crystal growth
thermal conductivity
heat measurement
specific heat
magnetization
single crystals
phonons
magnetic fields
mean free path
floating
dimers
retarding
exponents
augmentation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Single-crystal growth of Pb2V3O9 and the Bose-Einstein condensed state of triplons studied by thermal conductivity, specific heat and magnetization measurements. / Kawamata, T.; Sugawara, N.; Uesaka, M.; Kaneko, N.; Kajiwara, T.; Yamane, H.; Koyama, K.; Kudo, Kazutaka; Kobayashi, N.; Koike, Y.

In: Journal of Physics: Conference Series, Vol. 150, No. 4, 042087, 2009.

Research output: Contribution to journalArticle

Kawamata, T. ; Sugawara, N. ; Uesaka, M. ; Kaneko, N. ; Kajiwara, T. ; Yamane, H. ; Koyama, K. ; Kudo, Kazutaka ; Kobayashi, N. ; Koike, Y. / Single-crystal growth of Pb2V3O9 and the Bose-Einstein condensed state of triplons studied by thermal conductivity, specific heat and magnetization measurements. In: Journal of Physics: Conference Series. 2009 ; Vol. 150, No. 4.
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AU - Sugawara, N.

AU - Uesaka, M.

AU - Kaneko, N.

AU - Kajiwara, T.

AU - Yamane, H.

AU - Koyama, K.

AU - Kudo, Kazutaka

AU - Kobayashi, N.

AU - Koike, Y.

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