2001/08/13 by Leonid P. Rokhinson, L. P. Rokhinson, L. Jay Guo +4 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Quantum and electron transport phenomena #Semiconductor materials and devices #Silicon Nanostructures and Photoluminescence #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.87.166802
published as Physical Review Letters 87, 166802 (2001) · 5 pages, 4 figures, accepted to PRL
arxiv created 2001/08/13 · openalex publication_date 2001/10/02 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report unexpected fluctuations in the positions of Coulomb blockade peaks at high magnetic fields in a small Si quantum dot. The fluctuations have a distinctive sawtooth pattern: as a function of magnetic field, linear shifts of peak positions are compensated by abrupt jumps in the opposite direction. The linear shifts have large slopes, suggesting formation of the ground state with a nonzero angular momentum. The value of the momentum is found to be well defined, despite the absence of the rotational symmetry in the dot.