Kondo effect with Wilson fermions

被引：6

作者：

Ishikawa, Tsutomu ^{[1
,2
,3
]}

Nakayama, Katsumasa ^{[4
]}

Suzuki, Kei ^{[5
]}

机构：

[1] Grad Univ Adv Studies SOKENDAI, Tsukuba, Ibaraki 3050801, Japan

[2] High Energy Accelerator Res Org KEK, Inst Particle & Nucl Studies, KEK Theory Ctr, Tsukuba, Ibaraki 3050801, Japan

[3] RIKEN Ctr Computat Sci, Kobe, Hyogo 6500047, Japan

[4] DESY Zeuthen, NIC, Platanenallee 6, D-15738 Zeuthen, Germany

[5] Japan Atom Energy Agcy JAEA, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

来源：

PHYSICAL REVIEW D | 2021年 / 104卷 / 09期

基金：

日本学术振兴会;

关键词：

EFFECTIVE FIELD-THEORY; HEAVY-QUARK; CHIRAL-SYMMETRY; PHASE-STRUCTURE; NJL MODEL; LATTICE; EXPANSION; RECOVERY; BREAKING; LIGHT;

D O I：

10.1103/PhysRevD.104.094515

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 simulations.

引用

页数：11

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