Mott insulators
Mott insulators
Mott insulators
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<strong>Mott</strong> <strong>insulators</strong><br />
Metal-insulator transition from the insulating side<br />
Hubbard-model:<br />
density: n=1<br />
„ground state“<br />
n.n. hopping<br />
onsite repulsion<br />
t > 0<br />
W = 4d t<br />
E<br />
charge excitation<br />
U<br />
h<br />
d<br />
metal-insulator transition: U c = 4dt