Phase Diagram of the Triangular t-J Model with Multiple Spin Exchange in the Doped-Mott Region

Details Phase Diagram of the Triangular t-J Model with Multiple Spin Exchange in the Doped-Mott Region Phase Diagram of the Triangular t-J Model with Multiple Spin Exchange in the Doped-Mott Region

2008-04-28

arxiv.org/abs/0804.4329v2

J. Phys. Soc. Jpn. 78 (2009) 013601

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures, to appear in J. Phys. Soc. Jpn. Vol. 78, No.1 (2009)

Scientific paper

10.1143/JPSJ.78.013601

We study the triangular $t$-$J$ model with multiple spin exchange interactions using exact diagonalization of small clusters, as a model of monolayer liquid $^3$He. A phase where the energy spectrum suggest the behaviors of spin-charge separation is realized in the doped-Mott region due to the competition between ferromagnetic two-spin and antiferromagnetic four-spin exchange interactions. This behavior gives an interpretation of the double peaked heat capacity recently observed in monolayer liquid $^3$He adsorbed on a graphite.

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