Two classes of Mott insulator

Article

关键词: VALENCE-BOND STATE;    HIGH-TEMPERATURE SUPERCONDUCTORS;    PHASE-SEPARATION;    ISING-MODEL;    TRANSITIONS;    INSTABILITY;    TOPOLOGY;    SYMMETRY;    LATTICE;    VERGE;   

DOI  :  10.1103/PhysRevB.67.024506

来源: SCIE

【 摘 要 】

There are two classes of Mott insulators in nature, distinguished by their responses to weak doping. With increasing chemical potential, type I Mott insulators undergo a first order phase transition from the undoped to the doped phase. In the presence of long-range Coulomb interactions, this leads to an inhomogeneous state exhibiting micro-phase separation. In contrast, in type II Mott insulators charges go in continuously above a critical chemical potential. We show that if the insulating state has a broken symmetry, this increases the likelihood that it will be type I. There exists a close analogy between these two types of Mott insulators and the familiar type I and type II superconductors.

【 授权许可】

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