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

Journal Article · Sun Mar 15 04:00:00 EDT 2015 · Annals of Physics

DOI:https://doi.org/10.1016/J.AOP.2014.12.008· OSTI ID:22447600

Cichy, Agnieszka ^[1]; Cichy, Krzysztof ^[1]

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1. Institut für Theoretische Physik, Goethe-Universität, 60438 Frankfurt/Main (Germany)

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.

• OSTI ID: 22447600
• Journal Information: Annals of Physics, Journal Name: Annals of Physics Vol. 354; ISSN 0003-4916; ISSN APNYA6
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
FERMIONS
GROUND STATES
HUBBARD MODEL
MAGNETIC FIELDS
OSCILLATIONS
PHASE DIAGRAMS
SUPERFLUIDITY
TWO-DIMENSIONAL CALCULATIONS
ZEEMAN EFFECT