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Classical frustration and quantum disorder in spin-orbital models

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arxiv cond-mat/9811075 v1 pith:MBCRSLDJ submitted 1998-11-05 cond-mat.str-el

classification cond-mat.str-el
keywords classicalfrustrationmodelsquantumspin-orbitalcharacterizeddegeneratedescribing
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abstract

The most elementary of all physical spin-orbital models is the Kugel-Khomskii model describing a S=1/2, $e_g$ degenerate Mott-insulator. Recent theoretical work is reviewed revealing that the classical limit is characterized by a point of perfect dynamical frustration. It is suggested that this might give rise to a quantum disordered ground state.

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  1. Altermagnetism without a long-range order

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    The authors claim an 'altermagnetic liquid' phase with nonzero spin–pseudospin correlations but no long-range order, supported by an approximate Green's function calculation; however, a key signature is internally inc...

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