Magnetically-induced reconstructions of the ground state in a few-electron Si quantum dot

Details Magnetically-induced reconstructions of the ground state in a few-electron Si quantum dot Magnetically-induced reconstructions of the ground state in a few-electron Si quantum dot

2001-08-13

arxiv.org/abs/cond-mat/0108210v1

Physical Review Letters 87, 166802 (2001)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures, accepted to PRL

Scientific paper

10.1103/PhysRevLett.87.166802

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 saw-tooth 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 non-zero angular momentum. The value of the momentum is found to be well defined, despite the absence of the rotational symmetry in the dot.

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