0(4)-invariant formulation of the nodal liquid

Article

关键词: FRUSTRATED QUANTUM ANTIFERROMAGNETS;    HUBBARD-MODEL;    HEISENBERG-ANTIFERROMAGNET;    NORMAL-STATE;    SYMMETRY;    PHASE;    SUPERCONDUCTIVITY;    ORDER;   

DOI  :  10.1103/PhysRevB.62.R6135

来源: SCIE

【 摘 要 】

We consider the O(4) symmetric point in the phase diagram of an electron system in which there is a transition between d(x2-y2) density-wave order and d(x2-y2) superconductivity. If the pseudospin SU(2)subset of O(4) symmetry is disordered by quantum fluctuations, the nodal liquid can result. In this context, we (1) construct a pseudospin sigma model, (2) discuss its topological excitations, (3) point out the possibility of a pseudospin Peierls state, and (4) propose a phase diagram for the underdoped cuprate superconductors.

【 授权许可】

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