Electron transport across electrically switchable magnetic molecules
Citation:
Sujeet K. Shukla and Stefano Sanvito, Electron transport across electrically switchable magnetic molecules, Physical Review B, 80, 2009, 184429Download Item:
Abstract:
We investigate the electron-transport properties of a model magnetic molecule formed by two magnetic
centers whose exchange coupling can be altered with a longitudinal electric field. In general, we find a negative
differential conductance at low temperatures originating from the different scattering amplitudes of the singlet
and triplet states. More interestingly, when the molecule is strongly coupled to the leads and the potential drop
at the magnetic centers is only weakly dependent on the magnetic configuration, we find that there is a critical
voltage
V
C
at which the current becomes independent of the temperature. This corresponds to a peak in the
low-temperature current noise. In such limit, we demonstrate that the quadratic current fluctuations are pro-
portional to the product between the conductance fluctuations and the temperature
Sponsor
Grant Number
Science Foundation Ireland (SFI)
Author's Homepage:
http://people.tcd.ie/sanvitosDescription:
PUBLISHED
Author: SANVITO, STEFANO
Type of material:
Journal ArticleCollections
Series/Report no:
Physical Review B80
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Full text availableKeywords:
PhysicsSubject (TCD):
Nanoscience & MaterialsDOI:
http://dx.doi.org/10.1103/PhysRevB.80.184429Metadata
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