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Condensed Matter > Quantum Gases

arXiv:1905.05398 (cond-mat)
[Submitted on 14 May 2019]

Title:Formation of localized magnetic states in a large-spin Fermi system

Authors:Bin-Zhou Mi, Qiang Gu
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Abstract:We extend the Anderson impurity model to a large-spin Fermi system with spin $f$=3/2, stimulated by the realization of large-spin ultracold Fermi atoms. The condition required for the spontaneous formation of local magnetic moments is examined and the ground state mean-field magnetic phase diagram is explored carefully. We find that the spin-3/2 Fermi system involves magnetic phase regions I, II, and III that correspond to one, two, and three particle/hole occupation, respectively. In addition, it is observed that all the three magnetic phases have four-fold degenerate ground states. Finally, the phase transition between the three phases seems to be of the first-order.
Comments: 9 pages, 13 figures
Subjects: Quantum Gases (cond-mat.quant-gas); Strongly Correlated Electrons (cond-mat.str-el)
Cite as: arXiv:1905.05398 [cond-mat.quant-gas]
  (or arXiv:1905.05398v1 [cond-mat.quant-gas] for this version)
  https://doi.org/10.48550/arXiv.1905.05398
Journal reference: Physical Review B99, 184405 (2019)
Related DOI: https://doi.org/10.1103/PhysRevB.99.184405

Submission history

From: Qiang Gu [view email]
[v1] Tue, 14 May 2019 05:31:43 UTC (244 KB)
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