Two relativistic Kondo effects: Classification with particle and antiparticle impurities
We investigate two different types of relativistic Kondo effects, distinguished by heavy-impurity degrees of freedom, by focusing on the energy-momentum dispersion relations of the ground state with condensates composed of a light Dirac fermion and a nonrelativistic impurity fermion. Heavy-fermion d...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2021-03-01
|
| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.3.013233 |
| _version_ | 1797211034079985664 |
|---|---|
| author | Yasufumi Araki Daiki Suenaga Kei Suzuki Shigehiro Yasui |
| author_facet | Yasufumi Araki Daiki Suenaga Kei Suzuki Shigehiro Yasui |
| author_sort | Yasufumi Araki |
| collection | DOAJ |
| description | We investigate two different types of relativistic Kondo effects, distinguished by heavy-impurity degrees of freedom, by focusing on the energy-momentum dispersion relations of the ground state with condensates composed of a light Dirac fermion and a nonrelativistic impurity fermion. Heavy-fermion degrees of freedom are introduced in terms of two types of heavy-fermion effective theories, in other words, two heavy-fermion limits for the heavy Dirac fermion, which are known as the heavy-quark effective theories (HQETs) in high-energy physics. While the first one includes only the heavy-particle component, the second one contains both the heavy-particle and heavy-antiparticle components, which are opposite in their parity. From these theories, we obtain two types of Kondo effects, in which the dispersions near the Fermi surface are very similar, but they differ in the structure at low momentum. We also classify the possible forms of condensates in the two limits. The two Kondo effects will be examined by experiments with Dirac/Weyl semimetals or quark matter, lattice simulations, and cold-atom simulations. |
| first_indexed | 2024-04-24T10:20:04Z |
| format | Article |
| id | doaj.art-02106617848742b4ab93b9e028b0e59a |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:20:04Z |
| publishDate | 2021-03-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-02106617848742b4ab93b9e028b0e59a2024-04-12T17:08:15ZengAmerican Physical SocietyPhysical Review Research2643-15642021-03-013101323310.1103/PhysRevResearch.3.013233Two relativistic Kondo effects: Classification with particle and antiparticle impuritiesYasufumi ArakiDaiki SuenagaKei SuzukiShigehiro YasuiWe investigate two different types of relativistic Kondo effects, distinguished by heavy-impurity degrees of freedom, by focusing on the energy-momentum dispersion relations of the ground state with condensates composed of a light Dirac fermion and a nonrelativistic impurity fermion. Heavy-fermion degrees of freedom are introduced in terms of two types of heavy-fermion effective theories, in other words, two heavy-fermion limits for the heavy Dirac fermion, which are known as the heavy-quark effective theories (HQETs) in high-energy physics. While the first one includes only the heavy-particle component, the second one contains both the heavy-particle and heavy-antiparticle components, which are opposite in their parity. From these theories, we obtain two types of Kondo effects, in which the dispersions near the Fermi surface are very similar, but they differ in the structure at low momentum. We also classify the possible forms of condensates in the two limits. The two Kondo effects will be examined by experiments with Dirac/Weyl semimetals or quark matter, lattice simulations, and cold-atom simulations.http://doi.org/10.1103/PhysRevResearch.3.013233 |
| spellingShingle | Yasufumi Araki Daiki Suenaga Kei Suzuki Shigehiro Yasui Two relativistic Kondo effects: Classification with particle and antiparticle impurities Physical Review Research |
| title | Two relativistic Kondo effects: Classification with particle and antiparticle impurities |
| title_full | Two relativistic Kondo effects: Classification with particle and antiparticle impurities |
| title_fullStr | Two relativistic Kondo effects: Classification with particle and antiparticle impurities |
| title_full_unstemmed | Two relativistic Kondo effects: Classification with particle and antiparticle impurities |
| title_short | Two relativistic Kondo effects: Classification with particle and antiparticle impurities |
| title_sort | two relativistic kondo effects classification with particle and antiparticle impurities |
| url | http://doi.org/10.1103/PhysRevResearch.3.013233 |
| work_keys_str_mv | AT yasufumiaraki tworelativistickondoeffectsclassificationwithparticleandantiparticleimpurities AT daikisuenaga tworelativistickondoeffectsclassificationwithparticleandantiparticleimpurities AT keisuzuki tworelativistickondoeffectsclassificationwithparticleandantiparticleimpurities AT shigehiroyasui tworelativistickondoeffectsclassificationwithparticleandantiparticleimpurities |