Magnetic-field-induced resonant tunneling through a microjunction in a quantum wire

Autor:	V. Marigliano Ramaglia, G. P. Zucchelli, Franco Ventriglia
Rok vydání:	1993
Předmět:	Physics Quantization (physics) Condensed matter physics Saddle point Quantum wire Conductance Champ magnetique Fermi gas Quantum tunnelling Magnetic field
Zdroj:	Physical Review B. 48:2445-2451
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.48.2445
Popis:	We study a microjunction in a two-dimensional electron gas under the action of a uniform magnetic field, orthogonal to the gas plane. The microjunction is modeled as an infinite rectilinear waveguide with parabolic walls interrupted by a barrier. Low magnetic fields suppress the backscattering and improve the conductance quantization with sharper transmission steps. At higher field values an unexpected feature emerges: the resonant tunneling through the barrier. Just near the threshold, at energies for which the traversal of the barrier is classically forbidden, well-defined transmission peaks appear which correspond to quasibound states trapped inside the barrier
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be85b0286efe3a3d44a09a80f70d8a18 https://doi.org/10.1103/physrevb.48.2445 Zobrazit plný text záznamu