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arXiv 1005.0621cond-mat.mes-hallcond-mat.str-el
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自旋1分子自旋态的机械控制与欠屏蔽近藤效应

Mechanical Control of Spin States in Spin-1 Molecules and the Underscreened Kondo Effect

J. J. Parks, A. R. Champagne, T. A. Costi, W. W. Shum, A. N. Pasupathy, E. Neuscamman, S. Flores-Torres, P. S. Cornaglia, A. A. Aligia, C. A. Balseiro, G. K. -L… 展开作者

J. J. Parks, A. R. Champagne, T. A. Costi, W. W. Shum, A. N. Pasupathy, E. Neuscamman, S. Flores-Torres, P. S. Cornaglia, A. A. Aligia, C. A. Balseiro, G. K. -L. Chan, H. D. Abruña, D. C. Ralph

摘要:

与单分子进行电接触的能力创造了在尽可能小的长度尺度上研究控制电子流的基本过程的机会。我们报告的实验中,我们可控地拉伸个别钴配合物具有自旋S = 1,同时测量电流通过分子。在没有磁场的情况下,通过改变分子的对称性来操纵分子的自旋态和磁各向异性。这种控制使得对欠屏蔽的近藤效应的定量研究成为可能,在这种效应中,传导电子只能部分补偿分子的自旋。我们的研究结果表明,在单分子器件的自旋控制机制,并建立它们可以作为模型系统,使相关电子理论的精度测试。

英文摘要:

The ability to make electrical contact to single molecules creates opportunities to examine fundamental processes governing electron flow on the smallest possible length scales. We report experiments in which we controllably stretch individual cobalt complexes having spin S = 1, while simultaneously measuring current flow through the molecule. The molecule's spin states and magnetic anisotropy were manipulated in the absence of a magnetic field by modification of the molecular symmetry. This control enabled quantitative studies of the underscreened Kondo effect, in which conduction electrons only partially compensate the molecular spin. Our findings demonstrate a mechanism of spin control in single-molecule devices and establish that they can serve as model systems for making precision tests of correlated-electron theories.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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