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Title: Competition between Abelian and Zeeman magnetic field effects in a two dimensional ultracold gas of fermions

The ground state of ultracold fermions in the presence of effects of orbital and Zeeman magnetic fields is analyzed. Five different states are found: unpolarized superconducting state, partially and fully polarized normal states and phase separated regions, partially or fully polarized. The system, in the presence of orbital synthetic magnetic field effects, shows non-monotonous changes of the phase boundaries when electron concentration is varied. We observe not only reentrant phenomena, but also density dependent oscillations of different areas of the phase diagram. Moreover the chemical potential shows oscillatory behavior and discontinuities with respect to changes in the number of fermions.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4]
  1. Institut für Theoretische Physik, Goethe-Universität, 60438 Frankfurt/Main (Germany)
  2. (Germany)
  3. (Poland)
  4. Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań (Poland)
Publication Date:
OSTI Identifier:
22447600
Resource Type:
Journal Article
Resource Relation:
Journal Name: Annals of Physics; Journal Volume: 354; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; FERMIONS; GROUND STATES; HUBBARD MODEL; MAGNETIC FIELDS; OSCILLATIONS; PHASE DIAGRAMS; SUPERFLUIDITY; TWO-DIMENSIONAL CALCULATIONS; ZEEMAN EFFECT