Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2005-12-16
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
to appear in Physical Review B
Scientific paper
10.1103/PhysRevB.74.035321
We fabricated strongly confined Schottky-gated quantum point contacts by etching Si/SiGe heterostructures and observed intriguing conductance quantization in units of approximately 1e2/h. Non-linear conductance measurements were performed depleting the quantum point contacts at fixed mode-energy separation. We report evidences of the formation of a half 1e2/h plateau, supporting the speculation that adiabatic transmission occurs through 1D modes with complete removal of valley and spin degeneracies.
Evangelisti Federico
Gaspare L. Di
Giovine Ennio
Leoni Riccardo
Notargiacomo Andrea
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