Aharonov-Bohm oscillations in a one-dimensional Wigner crystal ring
- Department of Applied Physics, Chalmers University of Technology Goeteborg University, S-412 96 Goeteborg (Sweden)
- Department of Physics, Indiana University, Bloomington, Indiana 47405 (United States)
({ital V}{sub {ital p}} is the amplitude of the pinning potential, {ital T}{sub 0}={h_bar}{ital v}{sub {ital F}}/{ital L}, {ital v}{sub {ital F}}{similar_to}{h_bar}/{ital ma} is the drift velocity of a Wigner crystal ring with lattice spacing {ital a}). For very weak pinning, {ital V}{sub {ital p}}{much_lt}{ital T}{sub 0}, the influence of the barrier on the persistent current of a Wigner crystal ring is negligibly small. We have also shown that unscreened, long-range Coulomb interactions increase the stiffness of the Wigner lattice. This leads to additional suppression of the amplitude of Aharonov-Bohm oscillations, but makes the predicted anomalous temperature dependence of the persistent current in the strong pinning limit even more pronounced. The corresponding temperature of the peak will also be shifted by a factor which depends on the number of particles in the ring. The impact of dissipation on the persistent current of a Wigner crystal ring is also studied.
- OSTI ID:
- 147790
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 52, Issue 23; Other Information: PBD: 15 Dec 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
Aharonov{endash}Bohm oscillations at finite temperature
Aharonov-Bohm--type effect for vortices in Josephson-junction arrays