Orbital contributions to the electron g-factor in semiconductor nanowires
| Autor: | Rafal Skolasinski, Daniel Varjas, Alexey A. Soluyanov, Michael Wimmer, Georg W. Winkler, Matthias Troyer |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Superconductivity Nanowire FOS: Physical sciences General Physics and Astronomy 02 engineering and technology Electron Fermion 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 01 natural sciences Superconductivity (cond-mat.supr-con) MAJORANA Condensed Matter::Materials Science Effective mass (solid-state physics) Quantum dot Quantum mechanics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences 010306 general physics 0210 nano-technology Anisotropy Order of magnitude |
| Zdroj: | Physical Review Letters, 119(3) |
| ISSN: | 0031-9007 |
| Popis: | Recent experiments on Majorana fermions in semiconductor nanowires [Albrecht et al., Nat. 531, 206 (2016)] revealed a surprisingly large electronic Land\'e g-factor, several times larger than the bulk value - contrary to the expectation that confinement reduces the g-factor. Here we assess the role of orbital contributions to the electron g-factor in nanowires and quantum dots. We show that an LS coupling in higher subbands leads to an enhancement of the g-factor of an order of magnitude or more for small effective mass semiconductors. We validate our theoretical finding with simulations of InAs and InSb, showing that the effect persists even if cylindrical symmetry is broken. A huge anisotropy of the enhanced g-factors under magnetic field rotation allows for a straightforward experimental test of this theory. Comment: Supplemental Material appended |
| Databáze: | OpenAIRE |
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