Title

Magnetic quantum coherence effect in Ni-4 molecular transistors

Authors

Authors

G. Gonzalez;M. N. Leuenberger

Comments

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Abbreviated Journal Title

J. Phys.-Condes. Matter

Keywords

single molecule magnets; magnetic quantum tunneling; Landauer formula; INTERFERENCE; PARTICLES; SUPPRESSION; STATES; Physics, Condensed Matter

Abstract

We present a theoretical study of electron transport in Ni-4 molecular transistors in the presence of Zeeman spin splitting and magnetic quantum coherence (MQC). The Zeeman interaction is extended along the leads which produces gaps in the energy spectrum which allow electron transport with spin polarized along a certain direction. We show that the coherent states in resonance with the spin up or down states in the leads induces an effective coupling between localized spin states and continuum spin states in the single molecule magnet and leads, respectively. We investigate the conductance at zero temperature as a function of the applied bias and magnetic field by means of the Landauer formula, and show that the MQC is responsible for the appearence of resonances. Accordingly, we name them MQC resonances.

Journal Title

Journal of Physics-Condensed Matter

Volume

26

Issue/Number

27

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

5

WOS Identifier

WOS:000338702600018

ISSN

0953-8984

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