Small Charging Energies and g -Factor Anisotropy in PbTe Quantum Dots.
- Resource Type
- Academic Journal
- Authors
- Ten Kate SC; IBM Research Europe, Säumerstrasse 4, 8803 Rüschlikon, Switzerland.; University of Twente, Drienerlolaan 5, 7522 NB Enschede, Netherlands.; Ritter MF; IBM Research Europe, Säumerstrasse 4, 8803 Rüschlikon, Switzerland.; Fuhrer A; IBM Research Europe, Säumerstrasse 4, 8803 Rüschlikon, Switzerland.; Jung J; Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.; Schellingerhout SG; Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.; Bakkers EPAM; Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.; Riel H; IBM Research Europe, Säumerstrasse 4, 8803 Rüschlikon, Switzerland.; Nichele F; IBM Research Europe, Säumerstrasse 4, 8803 Rüschlikon, Switzerland.
- Source
- Publisher: American Chemical Society Country of Publication: United States NLM ID: 101088070 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1530-6992 (Electronic) Linking ISSN: 15306984 NLM ISO Abbreviation: Nano Lett Subsets: PubMed not MEDLINE; MEDLINE
- Subject
- Language
- English
PbTe is a semiconductor with promising properties for topological quantum computing applications. Here, we characterize electron quantum dots in PbTe nanowires selectively grown on InP. Charge stability diagrams at zero magnetic field reveal large even-odd spacing between Coulomb blockade peaks, charging energies below 140 μeV and Kondo peaks in odd Coulomb diamonds. We attribute the large even-odd spacing to the large dielectric constant and small effective electron mass of PbTe. By studying the Zeeman-induced level and Kondo splitting in finite magnetic fields, we extract the electron g -factor as a function of magnetic field direction. We find the g -factor tensor to be highly anisotropic with principal g -factors ranging from 0.9 to 22.4 and to depend on the electronic configuration of the devices. These results indicate strong Rashba spin-orbit interaction in our PbTe quantum dots.