Compressible ferrimagnetism in the depleted periodic Anderson model

Article

关键词: QUANTUM MONTE-CARLO;    D-WAVE SUPERCONDUCTIVITY;    FERMI-LIQUID BEHAVIOR;    KONDO-HOLE;    SPIN;    FERROMAGNETISM;    PHASE;    ORDER;    ANTIFERROMAGNETISM;    MAGNETIZATION;   

DOI  :  10.1103/PhysRevB.97.085123

来源: SCIE

【 摘 要 】

Tight-binding Hamiltonians with single and multiple orbitals exhibit an intriguing array of magnetic phase transitions. In most cases the spin ordered phases are insulating, while the disordered phases may be either metallic or insulating. In this paper we report a determinant quantum Monte Carlo study of interacting electrons in a geometry which can be regarded as a two-dimensional periodic Anderson model with depleted interacting (f) orbitals. For a single depletion, we observe an enhancement of antiferromagnetic correlations and formation of localized states. For half of the f orbitals regularly depleted, the system exhibits a ferrimagnetic ground state. We obtain a quantitative determination of the nature of magnetic order, which we discuss in the context of Tsunetsugu's theorem, and show that, although the dc conductivity indicates insulating behavior at half filling, the compressibility remains finite.

【 授权许可】

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