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Non-equilibrium dynamics ofa single spin in a tunnel junction
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
2014 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Making spintronic devices is a hot topic for future technical development. In this work the non-equilibrium dynamics of a single spin in a tunnel junction is analyzed and numerically simulated. This is done in order to understand the dynamics of e.g. a magnetic molecule between two metal contacts for future spintronic devices. The work starts with looking at the system in a many-body theory picture in order to derive the interesting properties of the system. An initial solution for the system is analytically calculated as well as for the dynamic case. The dynamic has then been numerically simulated in order to get the time evolution of the system. The results showed that the dynamics of the molecular spin induced a spin dependent charge and spin currents in the system and that the currents could be used to control the molecular spin. It showed qualitatively how different parameters, for example coupling strength, effect the system and what to consider when designing a system similar to this.

Place, publisher, year, edition, pages
2014. , 38 p.
Series
UPTEC F, ISSN 1401-5757 ; 14003
Keyword [en]
molecular electronics, spintronics, solid state theory, spin system, quantum computers
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-218821OAI: oai:DiVA.org:uu-218821DiVA: diva2:697465
Educational program
Master Programme in Engineering Physics
Supervisors
Examiners
Available from: 2014-02-20 Created: 2014-02-18 Last updated: 2014-02-20Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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Output format
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