3 papers
physics.app-ph2020
Fabrication process and failure analysis for robust quantum dots in silicon
J. P. Dodson, Nathan Holman, Brandur Thorgrimsson +7
We present an improved fabrication process for overlapping aluminum gate quantum dot devices on Si/SiGe heterostructures that incorporates low-temperature inter-gate oxidation, the…
cond-mat.mes-hall2018
Signatures of atomic-scale structure in the energy dispersion and coherence of a Si quantum-dot qubit
J. C. Abadillo-Uriel, Brandur Thorgrimsson, Dohun Kim +11
We report anomalous behavior in the energy dispersion of a three-electron double-quantum-dot hybrid qubit and argue that it is caused by atomic-scale disorder at the quantum-well i…
cond-mat.mes-hall2018
The critical role of substrate disorder in valley splitting in Si quantum wells
Samuel F. Neyens, Ryan H. Foote, Brandur Thorgrimsson +11
Motivated by theoretical predictions that spatially complex concentration modulations of Si and Ge can increase the valley splitting in quantum wells, we grow and characterize Si/S…