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JETP Letters

, Volume 108, Issue 10, pp 691–696 | Cite as

Features of the Crystal Structure of Tm1–xYbxB12 Dodecaborides near a Quantum Critical Point and at a Metal–Insulator Transition

  • N. E. SluchankoEmail author
  • A. P. Dudka
  • O. N. Khrykina
  • N. B. Bolotina
  • A. N. Azarevich
  • A. V. Bogach
  • S. Yu. Gavrilkin
  • S. V. Demishev
  • A. V. Dukhnenko
  • N. Yu. Shitsevalova
  • V. B. Filipov
  • S. Gabani
  • K. Flachbart
Condensed Matter
  • 12 Downloads

Abstract

The magnetic phase diagram of Tm1–xYbxB12 antiferromagnets is determined from the specific heat measurements performed at low and ultralow temperatures (0.07–10 K). Precise experimental studies of the features of the crystal structure at room temperature suggest that a metal−insulator transition occurring in Tm1–xYbxB12 with the growth of x is accompanied by a significant (by a factor of 2–6) increase in the amplitude of atomic displacements in the boron and rare-earth sublattices. There is also a signature of an instability arising in the electron configuration of ytterbium ions at this transition. At room temperature, near the quantum critical point at xc ≈ 0.25, anomalies in the structural characteristics of dodecaborides under study are observed.

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Copyright information

© Pleiades Publishing, Inc. 2018

Authors and Affiliations

  • N. E. Sluchanko
    • 1
    • 2
    Email author
  • A. P. Dudka
    • 3
    • 1
  • O. N. Khrykina
    • 3
    • 1
  • N. B. Bolotina
    • 3
  • A. N. Azarevich
    • 1
    • 2
  • A. V. Bogach
    • 1
  • S. Yu. Gavrilkin
    • 4
  • S. V. Demishev
    • 1
    • 2
  • A. V. Dukhnenko
    • 5
  • N. Yu. Shitsevalova
    • 5
  • V. B. Filipov
    • 5
  • S. Gabani
    • 6
  • K. Flachbart
    • 6
  1. 1.Prokhorov General Physics InstituteRussian Academy of SciencesMoscowRussia
  2. 2.Moscow Institute of Physics and Technology (State University)DolgoprudnyiRussia
  3. 3.Shubnikov Institute of Crystallography, Federal Research Center Crystallography and PhotonicsRussian Academy of SciencesMoscowRussia
  4. 4.Lebedev Physical InstituteRussian Academy of SciencesMoscowRussia
  5. 5.Frantsevich Institute for Problems of Materials ScienceNational Academy of Sciences of UkraineKyivUkraine
  6. 6.Institute of Experimental PhysicsSlovak Academy of SciencesKošiceSlovak Republic

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