4.6 Article

Unconventional critical activated scaling of two-dimensional quantum spin glasses

期刊

PHYSICAL REVIEW B
卷 94, 期 2, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.94.024201

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资金

  1. CONICET (Argentina) [PIP 112-201301-00049]
  2. FONCyT (Argentina) [PICT-2013-0214]
  3. Universidad Nacional de San Luis (Argentina) [PROIPRO 3-10214]

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We study the critical behavior of two-dimensional short-range quantum spin glasses by numerical simulations. Using a parallel tempering algorithm, we calculate the Binder cumulant for the Ising spin glass in a transverse magnetic field with two different short-range bond distributions, the bimodal and the Gaussian ones. Through an exhaustive finite-size analysis, we show that the cumulant probably follows an unconventional activated scaling, which we interpret as new evidence supporting the hypothesis that the quantum critical behavior is governed by an infinite randomness fixed point.

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