Journal Article

PreJuSER-14603

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Spin precession and modulation in ballistic cylindrical nanowires due to the Rashba effect

Bringer, A. ; Schäpers, T.FZJ*

2011
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/10945  doi:10.1103/PhysRevB.83.115305

Abstract: The spin precession in a cylindrical semiconductor nanowire due to Rashba spin-orbit coupling has been investigated theoretically using an InAs nanowire containing a surface two-dimensional electron gas as a model. The eigenstates, energy-momentum dispersion, and the energy-magnetic field dispersion relation are determined by solving the Schrodinger equation in a cylindrical symmetry. The combination of states with the same total angular momentum but opposite spin orientation results in a periodic modulation of the axial spin component along the axis of the wire. Spin-precession about the wires axis is achieved by interference of two states with different total angular momentum. Because a superposition state with exact opposite spin precession exists at zero magnetic field, an oscillation of the spin orientation can be obtained. If an axially oriented magnetic field is applied, the spin gains an additional precessing component.

Keyword(s): J

Note: We thank N. Demarina (Forschungszentrum Julich) for fruitful discussions regarding the Schrodinger-Poisson solver in cylindrical systems and U. Zulicke (Massey University, New Zealand) and R. Winkler (Northern Illinois University, USA) for discussions on the Rashba effect at semiconductor interfaces. Furthermore, we acknowledge the support of or work by S. Blugel and D. Grutzmacher (Forschungszentrum Julich). This work was supported by the Deutsche Forschungsgemeinschaft through Grant No. FOR 912.

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Contributing Institute(s):

1. Halbleiter-Nanoelektronik (IBN-1)
2. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)
3. Quanten-Theorie der Materialien (PGI-1)
4. Halbleiter-Nanoelektronik (PGI-9)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2011

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