Anomalous impurity effect on magnetization in frustrated one-dimensional ferro- and ferrimagnets

Article

关键词: QUANTUM RENORMALIZATION-GROUPS;    SPIN LADDER SYSTEM;    TRIANGULAR LATTICE;    TEMPERATURE PROPERTIES;    NEUTRON-SCATTERING;    GROUND-STATE;    ANTIFERROMAGNETISM;    SR(CU1-XZNX)(2)O-3;    CU1-XZNXGEO3;    PEIERLS;   

DOI  :  10.1103/PhysRevB.76.174409

来源: SCIE

【 摘 要 】

Significant decrease of spontaneous magnetization in frustrated one-dimensional ferro- and ferrimagnets due to nonmagnetic impurities is predicted. Using the density-matrix renormalization group method and the exact diagonalization method, we confirm that the total spin can vanish due to a single impurity in finite chains. Introducing the picture of magnetic domain inversion, we numerically investigate the impurity-density dependence of magnetization. In particular, we show that even with an infinitesimal density of impurities, the magnetization in the ground state is reduced by about 40% from that of the corresponding pure system. Conditions for the materials which may show this anomalous impurity effect are formulated.

【 授权许可】

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