Quantum Theory of Magnetoelectromotive Instability in Nanoelectromechanical Systems with Positive Differential Conductance

Scientific paper - Original scientific paper

• Author: Danko Radić
• Author: Leonid Gorelik
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

We consider dc-electronic transport through a nanowire suspended between two normal-metal leads in the presence of an external magnetic field. We show the very mechanism through which such a system, whose stationary current-voltage characteristic is essentially characterized by positive differential conductance, becomes unstable with respect to an onset of self-excited oscillations in electrical transport and mechanical vibrations. The self-excitation mechanism is based on the correlation between the occupancy of the quantized spin-split electronic energy levels inside the nanowire and the velocity of the nanowire with the crucial influence of strong enough retardation effects in magnetomotive coupling coming from mechanical vibrations.

• Keywords (english): quantum electromechanical systems (QNEMS); magnetoelectromotive instability; self-excited oscillations; tunneling
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review Letters
• Numbering: vol. 111, no. 18, 186802
• p-ISSN: 0031-9007
• e-ISSN: 1079-7114
• DOI: https://doi.org/10.1103/PhysRevLett.111.186802
• URN:NBN: urn:nbn:hr:217:709671
• Publication: 2013
• Project: Number: 119-1191458-1023; Title (croatian): Sustavi s prostornim i dimenzijskim ograničenjima: korelacije i spinski efekti; Leader: Amir Hamzić; Jurisdiction: Croatia; Funding stream: ZP
• Document URL: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.111.186802
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (2013) by the American Physical Society. Received 13 March 2013; published 29 October 2013.
• Created on: 2019-11-26 21:09:33