$SrC{u}_2(B{O}_3{)}_2$: A Unique Mott Hubbard Insulator

Abstract

We discuss the recently discovered system $SrC{u}_2(B{O}_3{)}_2$, a realization of an exactly solvable model proposed two decades earlier. We propose its interpretation as a Mott Hubbard insulator. The possible superconducting phase arising from doping is explored, and its nature as well as its importance for testing the RVB theory of superconductivity are discussed.

18 pages,7 figures, Based on Invited Talk at 16th Nishinomiya Yukawa memorial symposium, Nov 13-14, Nishinomiya. To appear in Progress in Theoretical Physics, Suppliment 145(2002)

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