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 language | English (US) |
|---|---|
| Article number | 079903 |
| Journal | Physical Review B |
| Volume | 99 |
| Issue number | 7 |
| DOIs |
|
| State | Published - Feb 7 2019 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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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 journal › Comment/debate
TY - JOUR
T1 - Erratum
T2 - Metallic phases from disordered (2+1)-dimensional quantum electrodynamics (Physical Review B (2017) 95 (235145) DOI: 10.1103/PhysRevB.95.235145)
AU - Goswami, Pallab
AU - Goldman, Hart
AU - Raghu, S.
PY - 2019/2/7
Y1 - 2019/2/7
N2 - 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.
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.
UR - http://www.scopus.com/inward/record.url?scp=85061368259&partnerID=8YFLogxK
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U2 - 10.1103/PhysRevB.99.079903
DO - 10.1103/PhysRevB.99.079903
M3 - Comment/debate
VL - 99
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 7
M1 - 079903
ER -