Optimization of the sensitivity of a double-dot magnetic detector
Macucci, Massimo (Università di Pisa. Dipartimento di Ingegneria dell'Informazione)
Marconcini, Paolo (Università di Pisa. Dipartimento di Ingegneria dell'Informazione)
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)

Date:	2020
Abstract:	We investigate, by means of numerical simulations, the lowest magnetic field level that can be detected with a given relative accuracy with a sensor based on a double-dot device fabricated in a high-mobility two-dimensional electron gas. The double dot consists of a cavity delimited by an input and an output constriction, with a potential barrier exactly in the middle. In conditions of perfect symmetry, a strong conductance enhancement effect appears as a consequence of the constructive interference between symmetric trajectories. When the symmetry is broken, for example by the presence of an applied magnetic field, this enhancement effect is suppressed. We explore the design parameter space and assess the minimum magnetic field value that can be measured with a given accuracy in the presence of flicker noise.
Grants:	Ministerio de Economía y Competitividad SEV-2017-0706
Note:	Altres ajuts: ICN2 is funded by the CERCA Programme/Generalitat de Catalunya.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Magnetic sensor ; Quantum dot ; Flicker noise ; Mesoscopic cavity
Published in:	Electronics, Vol. 9, issue 7 (July 2020) , art. 1134, ISSN 2079-9292

DOI: 10.3390/electronics9071134

13 p, 342.2 KB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles