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      Thermal Hall effect in a phonon-glass Ba\(_3\)CuSb\(_2\)O\(_9\)

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          Abstract

          A distinct thermal Hall signal is observed in a quantum spin liquid candidate Ba\(_3\)CuSb\(_2\)O\(_9\). The transverse thermal conduction shows a power-law temperature dependence below 40 K where a spin gap opens. We suggest that, through the very low longitudinal thermal conductivity and the thermal Hall signals, a phonon Hall effect is induced by strong phonon scatterings by orphan Cu\(^{2+}\) spins formed in random domains of Cu\(^{2+}\)-Sb\(^{5+}\) dumbbells.

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          Journal
          2016-08-26
          Article
          1608.07401

          http://arxiv.org/licenses/nonexclusive-distrib/1.0/

          Custom metadata
          cond-mat.str-el cond-mat.mtrl-sci

          Condensed matter

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