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Paper detail

Spin Texture in Quantum Point Contacts in the Presence of Lateral Spin Orbit Coupling

A non-equilibrium Green's function formalism is used to study in detail the ballistic conductance of asymmetrically biased side-gated quantum point contacts (QPCs) in the presence of lateral spin-orbit coupling and electron-electron interaction for a wide range of QPC dimensions and gate bias voltage. Various conductance anomalies are predicted below the first quantized conductance plateau (G0=2e2/h) which occur due to spontaneous spin polarization in the narrowest portion of the QPC. The number of observed conductance anomalies increases with increasing aspect ratio (length/width) of the QPC constriction. These anomalies are fingerprints of spin textures in the narrow portion of the QPC.

preprint2010arXivOpen access
J. WanM. CahayP. DebrayR. S. Newrock
cond-mat.mes-hall
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Open access4 authors1 topic
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J. WanM. CahayP. DebrayR. S. Newrock

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