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 (G
0 = 2e
2/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.
Keywords: CONDUCTANCE ANOMALY; LATERAL SPIN-ORBIT COUPLING; QUANTUM POINT CONTACT; SPIN TEXTURE; SPINTRONICS
Document Type: Research Article
Publication date: 01 June 2011
- Journal of Nanoelectronics and Optoelectronics (JNO) is an international and cross-disciplinary peer reviewed journal to consolidate emerging experimental and theoretical research activities in the areas of nanoscale electronic and optoelectronic materials and devices into a single and unique reference source. JNO aims to facilitate the dissemination of interdisciplinary research results in the inter-related and converging fields of nanoelectronics and optoelectronics.
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