Frequency-dependent transport through a spin chain

van Hoogdalem, Kevin A. and Loss, Daniel. (2012) Frequency-dependent transport through a spin chain. Physical Review B, Vol. 85, H. 5 , 054413.

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Official URL: http://edoc.unibas.ch/dok/A6083503

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Motivated by potential applications in spintronics, we study frequency-dependent spin transport in nonitinerant one-dimensional spin chains. We propose a system that behaves as a capacitor for the spin degree of freedom. It consists of a spin chain with two impurities a distance d apart. We find that at low energy (frequency), the impurities flow to strong coupling, thereby effectively cutting the chain into three parts, with the middle island containing a discrete number of spin excitations. At finite frequency, spin transport through the system increases. We find a strong dependence of the finite-frequency characteristics both on the anisotropy of the spin chain and the applied magnetic field. We propose a method to measure the finite-frequency conductance in this system.
Faculties and Departments:05 Faculty of Science > Departement Physik
05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Mesoscopics (Loss)
UniBasel Contributors:Loss, Daniel
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Institute of Physics
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:10 Apr 2015 09:13
Deposited On:24 May 2013 09:02

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