Quantum deflagration and supersonic fronts of tunneling in molecular magnets

Article

关键词: MAGNETIZATION;    RELAXATION;    CROSSOVER;    MN12AC;   

DOI  :  10.1103/PhysRevB.85.094403

来源: SCIE

【 摘 要 】

The theory of magnetic deflagration taking into account dipolar-controlled spin tunneling has been applied to the realistic model of molecular magnet Mn12Ac. At small transverse field, the front speed upsilon has tunneling maxima on the bias field B-z, reflecting those of the molecular spin's relaxation rate calculated from the density-matrix equation. At high transverse field, spin tunneling directly out of the metastable ground state leads to front speeds that can exceed the speed of sound. Both for the weak and strong transverse fields, the spatial profile of the deflagration front near tunneling resonances shows a front of tunneling that triggers a burning front behind it.

【 授权许可】

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