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- W1567982198 abstract "We study the properties of t-t'-V model of hard-core bosons on the triangular lattice that can be realized in optical lattices. By mapping to the spin-1/2 XXZ model in a field, we determine the phase diagram of the t-V model where the supersolid characterized by the ordering pattern (x,x,-2x') (ferrimagnetic or SS A) is a ground state for chemical potential mu >3V. By turning on either temperature or t' at half-filling mu =3V, we find a first order transition from SS A to the elusive supersolid characterized by the (x,-x,0) ordering pattern (antiferromagnetic or SS C). In addition, we find a large region where a superfluid phase becomes a solid upon raising temperature at fixed chemical potential. This is an analog of the Pomeranchuk effect driven by the large entropic effects associated with geometric frustration on the triangular lattice." @default.
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- W1567982198 date "2007-10-16" @default.
- W1567982198 modified "2023-10-17" @default.
- W1567982198 title "Supersolidity, entropy, and frustration:<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi>t</mml:mi><mml:mtext>−</mml:mtext><mml:msup><mml:mi>t</mml:mi><mml:mo>′</mml:mo></mml:msup><mml:mtext>−</mml:mtext><mml:mi>V</mml:mi></mml:mrow></mml:math>model of hard-core bosons on the triangular lattice" @default.
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- W1567982198 doi "https://doi.org/10.1103/physrevb.76.144420" @default.
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