Dynamical effects and conductance asymmetry in metal-insulator-metal systems with different electrodes

Znanstveni rad - Izvorni znanstveni rad

• Autor: B. Tokić
• Autor: D. Šestović
• Autor: Leonardo Marušić
• Autor: Marijan Šunjić
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

We investigated the electron tunneling process in a planar system consisting of two semi-infinite metal electrodes of different dielectric properties separated by a narrow vacuum gap. This system can be viewed as a model of a metal-insulator-metal structure, or even as a very rough model of scanning tunneling microscopy. We used a local limit of a self-consistent dynamic calculation to evaluate effective tunneling barriers, and discussed the influence of different screening properties of the metallic electrodes on these barriers as well as on the conductance. We found that the barriers are significantly additionally lowered due to the difference in the charge fluctuation frequencies of the electrodes, and that the conductance minimum in such systems is shifted to a nonzero value. We compared our results with some measurements of I-V characteristics and work functions and found that our calculations contribute to the understanding of the observed conductance asymmetry.

• Ključne riječi (engleski): M-I-M system; plasmon; conductance
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Physical review B: Condensed matter and materials physics
• Brojčani podaci: vol. 60, br. 11, str. 8368-8372
• p-ISSN: 1098-0121
• e-ISSN: 1550-235X
• DOI: https://doi.org/10.1103/PhysRevB.60.8368
• URN:NBN: urn:nbn:hr:217:932673
• Datum objave publikacije: 1999
• URL dokumenta: http://dx.doi.org/10.1103/PhysRevB.60.8368
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: Copyright (1999) by the American Physical Society.
• Datum i vrijeme pohrane: 2019-10-10 09:12:06