Particle-hole symmetry and electromagnetic response of a half-filled Landau level
Journal Article
·
· Physical Review B
- Univ. of Chicago, IL (United States); University of Chicago
- Univ. of Chicago, IL (United States)
We derive exact physical consequences of particle-hole symmetry of the ν = 1/2 state of electrons in a strong magnetic field. We show that if the symmetry is not spontaneously broken, the Hall conductivity and the susceptibility satisfy an exact relationship, valid at any wave numbers and any frequencies much below the cyclotron frequency. The relationship holds for clean systems and also for systems with statistically particle-hole symmetric disorder. We work out the constraints this relationship imposes on the theory of the Dirac composite fermion. Here, we also argue that that the exact relationship is violated in the Halperin-Lee-Read (HLR) field theory and present an explicit calculation within a Galilean invariant mean-field approximation to the HLR theory to illustrate the breakdown.
- Research Organization:
- Univ. of Chicago, IL (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); Simons Foundation; USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
- Grant/Contract Number:
- SC0009924
- OSTI ID:
- 1595711
- Alternate ID(s):
- OSTI ID: 1535884
OSTI ID: 1347050
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 12 Vol. 95; ISSN 2469-9950; ISSN PRBMDO
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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