Non-local Aharonov-Bohm conductance oscillations in an asymmetric quan-tum ring

Autor:	Buchholz, S. S., Fischer, S. F., Kunze, U., Reuter, D., Wieck, A. D.
Rok vydání:	2008
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Appl. Phys. Lett. 94, 022107 (2009)
Druh dokumentu:	Working Paper
DOI:	10.1063/1.3069281
Popis:	We investigate ballistic transport and quantum interference in a nanoscale quantum wire loop fab-ricated as a GaAs/AlGaAs field-effect heterostructure. Four-terminal measurements of current and voltage characteristics as a function of top gate voltages show negative bend resistance as a clear signature of ballistic transport. In perpendicular magnetic fields phase-coherent transport leads to Aharonov-Bohm (AB) conductance oscillations which show equal amplitudes in the local and the non-local measurement at a temperature of 1.5 K and above. We attribute this novel observation to the symmetry of the orthogonal cross junctions connecting the four quantum wire leads with the asymmetric quantum wire ring. Comment: 3 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0811.3150 Zobrazit plný text záznamu View this record from Arxiv