Giant vortices in rotating electron droplets

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2006
Major/Subject
Mcode
Degree programme
Language
en
Pages
235324/1-5
Series
Physical Review B, Volume 73, Issue 23
Abstract
We predict the formation of giant vortices in quasi-two-dimensional quantum dots at high magnetic fields, i.e., in rapidly rotating electron droplets. Our numerical results for quantum dots confined by a flat, anharmonic potential show ground states where vortices are accumulated in the center of the dot, thereby leading to large cores in the electron and current densities. The phenomenon is analogous to what was recently found in rotating Bose-Einstein condensates. The giant-vortex states leave measurable signatures in the ground-state energetics. The conditions for the giant-vortex formation as well as the internal structure of the vortex cores are discussed.
Description
Keywords
density functional theory, exact diagonalization, Fermion system, Vortex
Other note
Citation
Räsänen, E. & Saarikoski, H. & Yu, Y. & Harju, A. & Puska, Martti J. & Reimann, S. M. 2006. Giant vortices in rotating electron droplets. Physical Review B. Volume 73, Issue 23. 235324/1-5. ISSN 1550-235X (electronic). DOI: 10.1103/physrevb.73.235324.