Počet záznamů: 1
Relation between the chemical force and the tunnelling current in atomic point contacts: a simple model
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SYSNO ASEP 0377181 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Relation between the chemical force and the tunnelling current in atomic point contacts: a simple model Tvůrce(i) Jelínek, Pavel (FZU-D) RID, ORCID
Ondráček, Martin (FZU-D) RID, ORCID
Flores, F. (ES)Zdroj.dok. Journal of Physics-Condensed Matter. - : Institute of Physics Publishing - ISSN 0953-8984
Roč. 24, č. 8 (2012), s. 1-10Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova tunneling ; nanoscale contacts ; scanning tunneling microscopy ; atomic force microscopy Vědní obor RIV BM - Fyzika pevných látek a magnetismus CEP GPP204/11/P578 GA ČR - Grantová agentura ČR GAP204/10/0952 GA ČR - Grantová agentura ČR GA202/09/0545 GA ČR - Grantová agentura ČR CEZ AV0Z10100521 - FZU-D (2005-2011) UT WOS 000300585900004 DOI 10.1088/0953-8984/24/8/084001 Anotace The relation between the tunnelling current and the interaction energy (or force) in an atomic-scale contact is discussed in the framework of a theoretical model established here. According to our model, we predict the existence of two characteristic scaling regimes, where the tunnelling current is either proportional to the interaction energy or to the square of the interaction energy. We show that the existence of a given regime is basically controlled by two parameters: (i) the degeneracy parameter that gives the energy separation of electron levels involved in the interaction and (ii) the hopping parameter between these electron levels. In addition, we discuss the validity of the Bardeen method to determine the tunnelling current for short tip-sample distances. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2013
Počet záznamů: 1