Low-frequency noise of quantum point contacts in the ballistic and quantum Hall regime

Autor:	C. Dekker, R. Eppenga, A.J. Scholten, C. T. Foxon, F. Liefrink, H. van Houten
Rok vydání:	1991
Předmět:	noise quantum Hall regime fluctuations Quantum point contact magnetic field low frequency noise Quantum Hall effect ballistic regime quantum interference phenomena quantum Hall effect resistance Quantum spin Hall effect resistance noise strong magnetic field Electrical and Electronic Engineering quantum point contact quantum point contacts Spin-½ Physics point contacts Condensed matter physics Quantum wire Quantum noise A7270 Noise processes and phenomena in electronic transport backscattering Condensed Matter Physics Electronic Optical and Magnetic Materials electrostatic potential INSPEC A7220M Galvanomagnetic and other magnetotransport effects semiconductors/insulators A7335 Mesoscopic systems and quantum interference Quantum electrodynamics spin degeneracy Conductance quantum Noise (radio) conductance
Zdroj:	Physica B.Condensed matter 175(1-3), 213-216. (1991)
ISSN:	0921-4526
DOI:	10.1016/0921-4526(91)90714-p
Popis:	The low-frequency resistance noise of quantum point contacts is shown to be dominated by fluctuations in the electrostatic potential. Both in the ballistic and in the quantum Hall regime, the noise is strongly suppressed if the conductance is quantized. The suppression is enhanced by a strong magnetic field due to the absence of backscattering in the point contact. Additional minima are found in the noise as a function of the conductance due to the lifting of the spin degeneracy by the field.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77c8b70df38c1b4a43ff2c9c98c88772 https://doi.org/10.1016/0921-4526(91)90714-p Zobrazit plný text záznamu