Spin Dynamics of Supramolecular Dimer Mn42 Interacting With a Spin-polarized Electron

张国锋; 高迎芳; 殷雯; 梁九卿; 严启伟

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Spin Dynamics of Supramolecular Dimer Mn42 Interacting With a Spin-polarized Electron

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A new family of the supramolecular antiferromagnetically exchange-coupled dimer of single-molecules magnets,[Mn4]2, really behave as a quantum mechanical coupled system and can be used for quantum computation [Tiron et al (2003) Phys. Rev. Lett. 91 227203]. We study the time evolution of [Mn4]2 dimer interacting with an injected electron by solving the time-dependent Schrodinger equations. We find that the variations of [Mn4]2 dimer magnetization and the electron spin crucially depend on the exchange interaction strength. Time evolution of the entanglement between the injected electron and supramolecular dimer [Mn4]2 is evaluated. It is observed that entanglement oscillates in time and is closely related to the spin variation of injected electron. From these characteristics the technique for the reversing and read-out of supramolecular dimer [Mn4]2 spin states is suggested.

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《中国物理快报：英文版》 |2004年第4期|598-600|共3页
作者
张国锋; 高迎芳; 殷雯; 梁九卿; 严启伟;
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State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences, Beijing 100080;

Institute of Theoretical Physics, Shanxi University, Taiyuan 030006;

Institute of Theoretical Physics, Shanxi University, Taiyuan 030006;

State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences, Beijing 100080;

Institute of Theoretical Physics, Shanxi University, Taiyuan 030006;

Institute of Theoretical Physics, Shanxi University, Taiyuan 030006;

State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences, Beijing 100080;

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Spin Dynamics of Supramolecular Dimer Mn42 Interacting With a Spin-polarized Electron

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