Direct Measurement of the Spin-Orbit Interaction in a Two-Electron InAs Nanowire Quantum Dot
Top Cited Papers
- 26 June 2007
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 98 (26), 266801
- https://doi.org/10.1103/physrevlett.98.266801
Abstract
We demonstrate control of the electron number down to the last electron in tunable few-electron quantum dots defined in catalytically grown InAs nanowires. Using low temperature transport spectroscopy in the Coulomb blockade regime, we propose a method to directly determine the magnitude of the spin-orbit interaction in a two-electron artificial atom with strong spin-orbit coupling. Because of a large effective factor , the transition from a singlet to a triplet ground state with increasing magnetic field is dominated by the Zeeman energy rather than by orbital effects. We find that the spin-orbit coupling mixes the and states and thus induces an avoided crossing with magnitude . This allows us to calculate the spin-orbit length in such systems using a simple model.
Keywords
This publication has 32 references indexed in Scilit:
- One-dimensional hole gas in germanium/silicon nanowire heterostructuresProceedings of the National Academy of Sciences, 2005
- Coherent Single Charge Transport in Molecular-Scale Silicon NanowiresNano Letters, 2005
- ZnO Nanowire TransistorsThe Journal of Physical Chemistry B, 2004
- Few-Electron Quantum Dots in NanowiresNano Letters, 2004
- Growth and transport properties of complementary germanium nanowire field-effect transistorsApplied Physics Letters, 2004
- Single-electron transistors in heterostructure nanowiresApplied Physics Letters, 2003
- Single-electron tunneling in InP nanowiresApplied Physics Letters, 2003
- Logic Gates and Computation from Assembled Nanowire Building BlocksScience, 2001
- Functional Nanoscale Electronic Devices Assembled Using Silicon Nanowire Building BlocksScience, 2001
- GaAs p-n junction formed in quantum wire crystalsApplied Physics Letters, 1992