MESOSCOPIC RING UNDER THE INFLUENCE OF TIME-PERIODICAL FLUX - AHARONOV-BOHM OSCILLATIONS AND TRANSMISSION OF WAVE-PACKETS

被引:13
作者
BULGAKOV, EN
SADREEV, AF
机构
[1] L. V. Kirensky Institute of Physics
关键词
D O I
10.1103/PhysRevB.52.11938
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The Aharonov-Bohm oscillations in the transmission probability of a one-dimensional mesoscopic ring between two electrodes are considered numerically where a time-periodical flux gamma(t)=gamma+lambda cos omega t is applied. Such a flux simulates a phase-coherent inelastic scattering due to the absorption/emission processes of modulation quanta. An increase of alternating flux amplitude lambda drastically changes the Aharonov-Bohm oscillations of the transmission though the exact period remains phi(0)=hc/e. A frequency dependence of the transmission has abrupt steps at omega=(E-E(F))/n, caused by the locking of the transmission in the nth channel where EF is the Fermi level. Moreover, for transmission of a narrow wave packet the time-periodical flux gives rise to two effects. The first is a fractioning of the input wave packet by the ring in such a way that the output wave function consists of a few separate wave packets. Their number, distance apart, and height essentially depend on the static flux gamma. The second effect is a strong space squeezing of the output wave packet.
引用
收藏
页码:11938 / 11944
页数:7
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