Magnetic-field-induced singularities in spin-dependent tunneling through InAs quantum dots
- 15 November 2000
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 62 (19) , 12621-12624
- https://doi.org/10.1103/physrevb.62.12621
Abstract
Current steps attributed to resonant tunneling through individual InAs quantum dots embedded in a GaAs-AlAs-GaAs tunneling device are investigated experimentally in magnetic fields up to 28 T. The steps evolve into strongly enhanced current peaks in high fields. This can be understood as a field-induced Fermi-edge singularity due to the Coulomb interaction between the tunneling electron on the quantum dot and the partly spin-polarized Fermi sea in the Landau quantized three-dimensional emitter.Keywords
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