Dirac Fermion Hierarchy of Composite Fermi Liquids
Journal Article
·
· Physical Review Letters
- Princeton Univ., NJ (United States); DOE/OSTI
Composite Fermi liquids (CFLs) are compressible states that can occur for 2D interacting fermions confined in the lowest Landau level at certain Landau level fillings. They have been understood as Fermi seas formed by composite fermions which are bound states of electromagnetic fluxes and electrons as reported by Halperin, Lee, and Read [Phys. Rev. B 47, 7312 (1993)]. At half filling, an explicitly particle-hole symmetric theory based on Dirac fermions was proposed by Son [Phys. Rev. X 5, 031027 (2015)] as an alternative low energy description. In this work, we investigate the Berry curvature of CFL model wave functions at a filling fraction of one-quarter, and observe that it is uniformly distributed over the Fermi sea except at the center where an additional π phase was found. Motivated by this, we propose an effective theory which generalizes Son’s half filling theory, by internal gauge flux attachment, to all filling fractions in which fermionic CFLs can occur. As a result, the numerical results support the idea of internal gauge flux attachment.
- Research Organization:
- Princeton Univ., NJ (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC)
- Grant/Contract Number:
- SC0002140
- OSTI ID:
- 1610646
- Alternate ID(s):
- OSTI ID: 1529659
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 122; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Weiss oscillations and particle-hole symmetry at the half-filled Landau level
Specific heat and pairing of Dirac composite fermions in the half-filled Landau level
Fluctuations and magnetoresistance oscillations near the half-filled Landau level
Journal Article
·
Wed Jun 14 20:00:00 EDT 2017
· Physical Review B
·
OSTI ID:1369390
Specific heat and pairing of Dirac composite fermions in the half-filled Landau level
Journal Article
·
Tue Oct 15 00:00:00 EDT 2019
· Annals of Physics
·
OSTI ID:22852336
Fluctuations and magnetoresistance oscillations near the half-filled Landau level
Journal Article
·
Sun Oct 13 20:00:00 EDT 2019
· Physical Review. B
·
OSTI ID:1803898