Spin quantum tunneling in single molecular magnets: Fingerprints in transport spectroscopy of current and noise

被引：85

作者：

Romeike, C. ^{[1
]}

Wegewijs, M. R. ^{[1
]}

Schoeller, H. ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Theoret Phys A, D-52056 Aachen, Germany

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.96.196805

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate that transport spectroscopy of single molecular magnets shows signatures of quantum tunneling at low temperatures. We find current and noise oscillations as a function of bias voltage due to a weak violation of spin-selection rules by quantum tunneling processes. The interplay with Boltzmann suppression factors leads to fake resonances with temperature-dependent position which do not correspond to any charge excitation energy. Furthermore, we find that quantum tunneling can completely suppress transport if the transverse anisotropy has a high symmetry.

引用

页数：4

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