首页|Dirac Kondo effect under magnetic catalysis

Dirac Kondo effect under magnetic catalysis

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  • NETL
  • NSTL
  • Amer Physical Soc
We develop a mean-field theory of a novel Kondo effect emerging in systems without a Fermi surface, which instead emerges under strong magnetic fields. We determine the magnitude of the Kondo condensate, which is a particle pairing composed of conducting Dirac fermions and localized impurities. We focus on the competition between the Kondo effect and the energy gap formation that stems from the pairing among the Dirac fermions leading to the dynamical chiral symmetry breaking. We find that this competition induces a quantum critical point. We also investigate finite-temperature effects. This system at vanishing fermion density can be studied with Monte Carlo lattice simulations, which do not suffer from the sign problem.

Koichi Hattori、Daiki Suenaga、Kei Suzuki、Shigehiro Yasui

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Zhejiang Institute of Modern Physics, Department of Physics, Zhejiang University, Hangzhou 310027, China||Research Center for Nuclear Physics (RCNP), Osaka University, Osaka 567-0047, Japan

Strangeness Nuclear Physics Laboratory, RIKEN Nishina Center, Wako 351-0198, Japan||Research Center for Nuclear Physics (RCNP), Osaka University, Osaka 567-0047, Japan

Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), Tokai 319-1195, Japan

International Institute for Sustainability with Knotted Chiral Mela Matter (WPI-SKCM~2), Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan||Research and Education Center for Natural Sciences, Keio University, Hiyoshi 4-1-1, Yokohama, Kanagawa 223-8521, Japan

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2023

10.1103/PhysRevB.108.245110

Physical review, B. Condensed matter and materials physics

Physical review, B. Condensed matter and materials physics

ISSN：2469-9950
年,卷(期)：2023.108(24)
  • 164