JETP Letters

, Volume 91, Issue 11, pp 599–606

Orbital glass and spin glass states of 3He-A in aerogel

  • V. V. Dmitriev
  • D. A. Krasnikhin
  • N. Mulders
  • A. A. Senin
  • G. E. Volovik
  • A. N. Yudin
Condensed Matter

Abstract

Glass states of superfluid A-like phase of 3He in aerogel induced by random orientations of aerogel strands are investigated theoretically and experimentally. In anisotropic aerogel with stretching deformation two glass phases are observed. Both phases represent the anisotropic glass of the orbital ferromagnetic vector Ηthe orbital glass (OG). The phases differ by the spin structure: the spin nematic vector \( \hat d \) can be either in the ordered spin nematic (SN) state or in the disordered spin-glass (SG) state. The first phase (OG-SN) is formed under conventional cooling from normal 3He. The second phase (OG-SG) is metastable, being obtained by cooling through the superfluid transition temperature, when large enough resonant continuous radio-frequency excitation is applied. NMR signature of different phases allows us to measure the parameter of the global anisotropy of the orbital glass induced by deformation.

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Copyright information

© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  • V. V. Dmitriev
    • 1
  • D. A. Krasnikhin
    • 1
  • N. Mulders
    • 2
  • A. A. Senin
    • 1
  • G. E. Volovik
    • 3
    • 4
  • A. N. Yudin
    • 1
  1. 1.Kapitza Institute for Physical ProblemsRussian Academy of SciencesMoscowRussia
  2. 2.Department of Physics and AstronomyUniversity of DelawareNewarkUSA
  3. 3.Low Temperature LaboratoryAalto UniversityAALTOFinland
  4. 4.Landau Institute for Theoretical PhysicsRussian Academy of SciencesMoscowRussia

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