Unconventional Ordering of Fermions with Several Flavors(Yukawa International Seminar 2004 (YKIS2004) Physics of Strongly Correlated Electron Systems)

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概要

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• We explore ordering tendencies in weakly coupled Hubbard and t-J models on the two-dimensional square lattice for fermions with N flavors. Such systems may be realized using ultracold atoms with several hyperfine states in optical lattices. The analysis is based on a functional renormalization group approach. In the repulsive Hubbard model for N>6 and half band filling staggered flux order is found as the dominant instability, in agreement with the large-N limit. In the t-J model without occupancy constraint this type of ground state is suggested already for N>2. In the attractive case and odd N a full Fermi surface coexists with a superfluid in the ground state. We describe how these unconventional paired states can be identified in the density response of the fermions.

• 理論物理学刊行会の論文
• 2006-02-06

著者

• Honerkamp Carsten

  Institut Fur Theoretische Physik Und Astrophysik Universitat Wurzburg

• HONERKAMP Carsten

  Institut fur Theoretische Physik und Astrophysik, Universitat Wurzburg

関連論文

• Unconventional Ordering of Fermions with Several Flavors(Yukawa International Seminar 2004 (YKIS2004) Physics of Strongly Correlated Electron Systems)
• Eliashberg Equations Derived from the Functional Renormalization Group(Condensed Matter and Statistical Physics)

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