Kondo effect with Wilson fermions
| Autor: | Tsutomu Ishikawa, Katsumasa Nakayama, Kei Suzuki |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
chiral [Gross-Neveu model]
fermion: Wilson Wilson [fermion] potential scalar High Energy Physics::Lattice Scalar (mathematics) FOS: Physical sciences Gross-Neveu model: chiral condensation scalar fermion: heavy fermion heavy scalar [potential] Condensed Matter - Strongly Correlated Electrons High Energy Physics - Phenomenology (hep-ph) High Energy Physics - Lattice Impurity heavy [fermion] Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ddc:530 Physics fermion Wilson Condensed Matter::Quantum Gases topological insulator Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Dirac (video compression format) condensation: scalar High Energy Physics - Lattice (hep-lat) potential: scalar lattice field theory Fermion Lattice QCD chemical [potential] Condensed Matter::Mesoscopic Systems and Quantum Hall Effect potential chemical Gross-Neveu model chiral Massless particle High Energy Physics - Phenomenology scalar [condensation] potential: chemical Topological insulator Condensed Matter::Strongly Correlated Electrons Kondo effect |
| Zdroj: | Physical review / D 104(9), 094515 (2021). doi:10.1103/PhysRevD.104.094515 Physical Review |
| DOI: | 10.3204/pubdb-2022-00054 |
| Popis: | Physical review / D 104(9), 094515 (2021). doi:10.1103/PhysRevD.104.094515 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. Published by Inst., Melville, NY |
| Databáze: | OpenAIRE |
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