Erratum

Metallic phases from disordered (2+1)-dimensional quantum electrodynamics (Physical Review B (2017) 95 (235145) DOI: 10.1103/PhysRevB.95.235145)

Pallab Goswami, Hart Goldman, S. Raghu

Research output: Contribution to journalComment/debate

Abstract

Metallic phases have been observed in several disordered two-dimensional (2D) systems, including thin films near superconductor-insulator transitions and quantum Hall systems near plateau transitions. The existence of 2D metallic phases at zero temperature generally requires an interplay of disorder and interaction effects. Consequently, experimental observations of 2D metallic behavior have largely defied explanation. We formulate a general stability criterion for strongly interacting, massless Dirac fermions against disorder, which describe metallic ground states with vanishing density of states. We show that (2+1)-dimensional quantum electrodynamics (QED3) with a large, even number of fermion flavors remains metallic in the presence of weak scalar potential disorder due to the dynamic screening of disorder by gauge fluctuations. We also show that QED3 with weak mass disorder exhibits a stable, dirty metallic phase in which both interactions and disorder play important roles.

Original languageEnglish (US)
Article number079903
JournalPhysical Review B
Volume99
Issue number7
DOIs
StatePublished - Feb 7 2019

Fingerprint

Fermions
Electrodynamics
quantum electrodynamics
disorders
Flavors
Stability criteria
Ground state
Superconducting materials
Gages
Screening
Thin films
fermions
Temperature
plateaus
screening
insulators
interactions
scalars
ground state
thin films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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abstract = "Metallic phases have been observed in several disordered two-dimensional (2D) systems, including thin films near superconductor-insulator transitions and quantum Hall systems near plateau transitions. The existence of 2D metallic phases at zero temperature generally requires an interplay of disorder and interaction effects. Consequently, experimental observations of 2D metallic behavior have largely defied explanation. We formulate a general stability criterion for strongly interacting, massless Dirac fermions against disorder, which describe metallic ground states with vanishing density of states. We show that (2+1)-dimensional quantum electrodynamics (QED3) with a large, even number of fermion flavors remains metallic in the presence of weak scalar potential disorder due to the dynamic screening of disorder by gauge fluctuations. We also show that QED3 with weak mass disorder exhibits a stable, dirty metallic phase in which both interactions and disorder play important roles.",
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Erratum : Metallic phases from disordered (2+1)-dimensional quantum electrodynamics (Physical Review B (2017) 95 (235145) DOI: 10.1103/PhysRevB.95.235145). / Goswami, Pallab; Goldman, Hart; Raghu, S.

In: Physical Review B, Vol. 99, No. 7, 079903, 07.02.2019.

Research output: Contribution to journalComment/debate

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AB - Metallic phases have been observed in several disordered two-dimensional (2D) systems, including thin films near superconductor-insulator transitions and quantum Hall systems near plateau transitions. The existence of 2D metallic phases at zero temperature generally requires an interplay of disorder and interaction effects. Consequently, experimental observations of 2D metallic behavior have largely defied explanation. We formulate a general stability criterion for strongly interacting, massless Dirac fermions against disorder, which describe metallic ground states with vanishing density of states. We show that (2+1)-dimensional quantum electrodynamics (QED3) with a large, even number of fermion flavors remains metallic in the presence of weak scalar potential disorder due to the dynamic screening of disorder by gauge fluctuations. We also show that QED3 with weak mass disorder exhibits a stable, dirty metallic phase in which both interactions and disorder play important roles.

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