Altman, Ehud, Demler, Eugene and Rosch, Achim ORCID: 0000-0002-6586-5721 (2012). Mott Criticality and Pseudogap in Bose-Fermi Mixtures. Phys. Rev. Lett., 109 (23). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1079-7114
Full text not available from this repository.Abstract
We study the Mott transition of a mixed Bose-Fermi system of ultracold atoms in an optical lattice, where the number of (spinless) fermions and bosons adds up to one atom per lattice, n(F) + n(B) = 1. For weak interactions, a Fermi surface coexists with a Bose-Einstein condensate while for strong interaction the system is incompressible but still characterized by a Fermi surface of composite fermions. At the critical point, the spectral function of the fermions A(k, omega) exhibits a pseudogapped behavior, rising as vertical bar omega vertical bar at the Fermi momentum, while in the Mott phase it is fully gapped. Taking into account the interaction between the critical modes leads at very low temperatures either to p-wave pairing or the transition is driven weakly first order. The same mechanism should also be important in antiferromagnetic metals with a small Fermi surface. DOI: 10.1103/PhysRevLett.109.235304
Item Type: | Journal Article | ||||||||||||||||
Creators: |
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URN: | urn:nbn:de:hbz:38-476944 | ||||||||||||||||
DOI: | 10.1103/PhysRevLett.109.235304 | ||||||||||||||||
Journal or Publication Title: | Phys. Rev. Lett. | ||||||||||||||||
Volume: | 109 | ||||||||||||||||
Number: | 23 | ||||||||||||||||
Date: | 2012 | ||||||||||||||||
Publisher: | AMER PHYSICAL SOC | ||||||||||||||||
Place of Publication: | COLLEGE PK | ||||||||||||||||
ISSN: | 1079-7114 | ||||||||||||||||
Language: | English | ||||||||||||||||
Faculty: | Unspecified | ||||||||||||||||
Divisions: | Unspecified | ||||||||||||||||
Subjects: | no entry | ||||||||||||||||
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URI: | http://kups.ub.uni-koeln.de/id/eprint/47694 |
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