Deconfined metallic quantum criticality: A U(2) gauge-theoretic approach
We discuss a new class of quantum phase transitions—deconfined Mott transition (DMT)—that describe a continuous transition between a Fermi liquid metal with a generic electronic Fermi surface and an electrical insulator without Fermi surfaces of emergent neutral excitations. We construct a unified U...
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| Format: | Article |
| Language: | English |
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American Physical Society
2020-06-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.023344 |
| _version_ | 1797211376076193792 |
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| author | Liujun Zou Debanjan Chowdhury |
| author_facet | Liujun Zou Debanjan Chowdhury |
| author_sort | Liujun Zou |
| collection | DOAJ |
| description | We discuss a new class of quantum phase transitions—deconfined Mott transition (DMT)—that describe a continuous transition between a Fermi liquid metal with a generic electronic Fermi surface and an electrical insulator without Fermi surfaces of emergent neutral excitations. We construct a unified U(2) gauge theory to describe a variety of metallic and insulating phases, which include Fermi liquids, fractionalized Fermi liquids (FL*), conventional insulators, and quantum spin liquids, as well as the quantum phase transitions between them. Using the DMT as a basic building block, we propose a distinct quantum phase transition—deconfined metal-metal transition (DM^{2}T)—that describes a continuous transition between two metallic phases, accompanied by a jump in the size of their electronic Fermi surfaces (also dubbed a ‘Fermi transition'). We study these new classes of deconfined metallic quantum critical points using a renormalization group framework at the leading nontrivial order in a controlled expansion and comment on the various interesting scenarios that can emerge going beyond this leading order calculation. We also study a U(1)×U(1) gauge theory that shares a number of similarities with the U(2) gauge theory and sheds important light on many phenomena related to DMT, DM^{2}T, and quantum spin liquids. |
| first_indexed | 2024-04-24T10:25:30Z |
| format | Article |
| id | doaj.art-013ac635ba5d4ab99fb4f08c94507413 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:25:30Z |
| publishDate | 2020-06-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-013ac635ba5d4ab99fb4f08c945074132024-04-12T16:55:45ZengAmerican Physical SocietyPhysical Review Research2643-15642020-06-012202334410.1103/PhysRevResearch.2.023344Deconfined metallic quantum criticality: A U(2) gauge-theoretic approachLiujun ZouDebanjan ChowdhuryWe discuss a new class of quantum phase transitions—deconfined Mott transition (DMT)—that describe a continuous transition between a Fermi liquid metal with a generic electronic Fermi surface and an electrical insulator without Fermi surfaces of emergent neutral excitations. We construct a unified U(2) gauge theory to describe a variety of metallic and insulating phases, which include Fermi liquids, fractionalized Fermi liquids (FL*), conventional insulators, and quantum spin liquids, as well as the quantum phase transitions between them. Using the DMT as a basic building block, we propose a distinct quantum phase transition—deconfined metal-metal transition (DM^{2}T)—that describes a continuous transition between two metallic phases, accompanied by a jump in the size of their electronic Fermi surfaces (also dubbed a ‘Fermi transition'). We study these new classes of deconfined metallic quantum critical points using a renormalization group framework at the leading nontrivial order in a controlled expansion and comment on the various interesting scenarios that can emerge going beyond this leading order calculation. We also study a U(1)×U(1) gauge theory that shares a number of similarities with the U(2) gauge theory and sheds important light on many phenomena related to DMT, DM^{2}T, and quantum spin liquids.http://doi.org/10.1103/PhysRevResearch.2.023344 |
| spellingShingle | Liujun Zou Debanjan Chowdhury Deconfined metallic quantum criticality: A U(2) gauge-theoretic approach Physical Review Research |
| title | Deconfined metallic quantum criticality: A U(2) gauge-theoretic approach |
| title_full | Deconfined metallic quantum criticality: A U(2) gauge-theoretic approach |
| title_fullStr | Deconfined metallic quantum criticality: A U(2) gauge-theoretic approach |
| title_full_unstemmed | Deconfined metallic quantum criticality: A U(2) gauge-theoretic approach |
| title_short | Deconfined metallic quantum criticality: A U(2) gauge-theoretic approach |
| title_sort | deconfined metallic quantum criticality a u 2 gauge theoretic approach |
| url | http://doi.org/10.1103/PhysRevResearch.2.023344 |
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