Thermal Hall Effect in a Phonon-Glass Ba3CuSb2 O9

K. Sugii, M. Shimozawa, D. Watanabe, Y. Suzuki, M. Halim, M. Kimata, Y. Matsumoto, S. Nakatsuji, M. Yamashita

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54 Citations (Scopus)


A distinct thermal Hall signal is observed in a quantum spin liquid candidate Ba3CuSb2O9. The transverse thermal conductivity shows a power-law temperature dependence below 50 K, where a spin gap opens. We suggest that because of the very low longitudinal thermal conductivity and the thermal Hall signals, a phonon Hall effect is induced by strong phonon scattering of orphan Cu2+ spins formed in the random domains of the Cu2+-Sb5+ dumbbells in Ba3CuSb2O9.

Original languageEnglish
Article number145902
JournalPhysical Review Letters
Issue number14
Publication statusPublished - 2017 Apr 7


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