|
This article is cited in 5 scientific papers (total in 5 papers)
SCIENTIFIC SUMMARIES
High-temperature Aharonov–Bohm effect in transport through a
single-channel quantum ring
A. P. Dmitrievab, I. V. Gornyiba, V. Yu. Kachorovskiiba, D. G. Polyakova, P. M. Shmakovb a Institut fur Nanotechnologie, Karlsruher Institut fur Technologie
b Ioffe Physico-Technical Institute, Russian Academy of Sciences, St. Petersburg
Abstract:
We overview transport properties of an Aharonov–Bohm interferometer
made of a single-channel quantum ring. Remarkably, in this setup, essentially
quantum effects survive thermal averaging: the high-temperature tunneling
conductance $G$ of a ring shows sharp dips (antiresonances) as a function of
magnetic flux.
We discuss effects of electron-electron interaction, disorder, and spin-orbit
coupling on the Aharonov–Bohm transport through the ring. The interaction
splits the dip into series of dips broadened by dephasing. The physics
behind this behavior is the persistent-current-blockade: the current through
the ring is blocked by the circular current inside the ring. Dephasing is
then dominated by tunneling-induced fluctuations of the circular current. The
short-range disorder broadens antiresonances, while the long-range one
induces additional dips. In the presence of a spin-orbit coupling, $G$
exhibits two types of sharp antiresonances: Aharonov–Bohm and Aharonov-Casher
ones. In the vicinity of the antiresonances, the tunneling electrons acquire
spin polarization, so that the ring serves as a spin polarizer.
Received: 05.11.2014
Citation:
A. P. Dmitriev, I. V. Gornyi, V. Yu. Kachorovskii, D. G. Polyakov, P. M. Shmakov, “High-temperature Aharonov–Bohm effect in transport through a
single-channel quantum ring”, Pis'ma v Zh. Èksper. Teoret. Fiz., 100:12 (2014), 946–958; JETP Letters, 100:12 (2014), 839–851
Linking options:
https://www.mathnet.ru/eng/jetpl4508 https://www.mathnet.ru/eng/jetpl/v100/i12/p946
|
Statistics & downloads: |
Abstract page: | 166 | Full-text PDF : | 56 | References: | 38 | First page: | 12 |
|