Spin-glass ordering in diluted magnetic semiconductors: A Monte Carlo study

Article

关键词: ANTIFERROMAGNETIC RP(2) MODEL;    3 DIMENSIONS;    COMPUTER-SIMULATION;    CRITICAL EXPONENTS;    ISING-MODEL;    CD1-XMNXTE;    DYNAMICS;    CD0.6MN0.4TE;    ZN1-XMNXTE;   

DOI  :  10.1103/PhysRevB.62.4999

来源: SCIE

【 摘 要 】

We study the temperature-dilution phase diagram of a site-diluted Heisenberg antiferromagnet on a face-certered-cubic lattice, with and without the Dzyaloshinskii-Moriya anisotropic term, fixed to realistic microscopic parameters for IIB1-xMnxTe(IIB= Cd,Hg,Zn). We show that the dipolar Dzyaloshinskii-Moriya anisotropy induces a finite-temperature phase transition to a spin-glass phase, at dilutions larger than 80%. The resulting probability distribution of the order parameter P(q) is similar to the one found in the cubic lattice Edwards-Anderson-Ising model. The critical exponents undergo large finite-size corrections, but tend to values similar to the ones of the Edwards-Anderson-Ising model.

【 授权许可】

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