Two relativistic Kondo effects: Classification with particle and antiparticle impurities

Araki, Yasufumi; Suenaga, Daiki; Suzuki, Kei; Yasui, Shigehiro

doi:10.1103/physrevresearch.3.013233

Cited by 10 publications

(2 citation statements)

References 96 publications

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“…Such "relativistic" Kondo effects can occur in relativistic-fermion systems including impurities, such as graphene (see Ref. [6] for a review), Dirac/Weyl semimetals [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23], dense nuclear matter [24][25][26][27], and dense quark matter [13,24,[28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44]. Among them, the QCD Kondo effect [24,28] is induced by the color exchange interaction between a light quark and an impurity quark, which is based on quantum chromodynamics (QCD).…”

Section: Introductionmentioning

confidence: 99%

Kondo effect with Wilson fermions

Ishikawa,

Nakayama,

Suzuki

2021

Preprint

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We investigate the Kondo effect with Wilson fermions. This is based on a mean-field approach for the chiral Gross-Neveu model including four-point interactions between a light Wilson fermion and a heavy fermion. For massless Wilson fermions, we demonstrate the appearance of the Kondo effect. We point out that there is a coexistence phase with both the light-fermion scalar condensate and Kondo condensate, and the critical chemical potentials of the scalar condensate are shifted by the Kondo effect. For negative-mass Wilson fermions, we find that the Kondo effect is favored near the parameter region realizing the Aoki phase. Our findings will be useful for understanding the roles of heavy impurities in Dirac semimetals, topological insulators, and lattice QCD simulations.

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Section: Introductionmentioning

confidence: 99%

Kondo effect with Wilson fermions

Ishikawa,

Nakayama,

Suzuki

2021

Preprint

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“…In fact, it was shown that the Kondo effect arises in nuclear matter when Σ c and Σ * c baryons or D and D * mesons exist as impurities, where the spin and/or isospin exchange serves as the non-Abelian interaction [3,[5][6][7]. In addition, many works on Kondo effect in a relativistic system have been done in the literatures [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. In this way, the interdisciplinary study bridging condensedmatter physics and QCD/hadron physics focused on the Kondo effect is attracting attention.…”

Section: Introductionmentioning

confidence: 99%

Heavy-quark spin polarization induced by the Kondo effect in a magnetic field

Suenaga,

Araki,

Suzuki

et al. 2021

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We propose a new mechanism of the heavy-quark spin polarization (HQSP) in quark matter induced by the Kondo effect under external magnetic field. The Kondo effect is caused by a condensate between a heavy and a light quark called the Kondo condensate leading to a mixing of the heavy and light quark spins. Thus the HQSP is driven through the Kondo effect from light quarks coupling with the magnetic field in quark matter. For demonstration, we employ the Nambu-Jona-Lasinio type model under a magnetic field, and investigate the HQSP within the linear response theory with vertex corrections required by the U (1)EM electromagnetic gauge invariance. As a result, we find that the HQSP arises significantly with the appearance of the Kondo effect. Our findings are testable in future sign-problem-free lattice simulations.

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