On the theory of anomalous tunneling due to paramagnetic impurities

Research output: Contribution to journalArticle

Abstract

Recently some anomalies have been observed in the characteristics of tunnel diodes at zero bias. Anderson and Suhl have called attention to the resonance scattering of electrons on paramagnetic impurities in the oxide layer. The effective density of states appearing in the formula of tunnel current is determined and the tunnel current is calculated by summing up the contributions of resonance scatterings. The actual appearance of the effect varies greatly and is strongly dependent on the parameter values: (1) For ferromagnetic coupling: resistivity minimum at zero bias, relative amplitude: 0-0.2. (2) For antiferromagnetic coupling: (a) giant resistivity maximum at zero bias, relative amplitude 0-100; (b) local resistivity minimum at zero bias superimposed on a background curve with resistivity maximum [type 2 (a)]. The investigation of tunneling characteristics may be a powerful method to check the resonance scattering amplitude for paramagnetic impurities.

Original languageEnglish
Pages (from-to)705
Number of pages1
JournalJournal of Applied Physics
Volume39
Issue number2
DOIs
Publication statusPublished - 1968

Fingerprint

resonance scattering
impurities
electrical resistivity
tunnels
tunnel diodes
scattering amplitude
anomalies
oxides
curves
electrons

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

On the theory of anomalous tunneling due to paramagnetic impurities. / Sólyom, J.; Zawadowski, A.

In: Journal of Applied Physics, Vol. 39, No. 2, 1968, p. 705.

Research output: Contribution to journalArticle

@article{928af0df75d24d2ba459636af8d3af92,
title = "On the theory of anomalous tunneling due to paramagnetic impurities",
abstract = "Recently some anomalies have been observed in the characteristics of tunnel diodes at zero bias. Anderson and Suhl have called attention to the resonance scattering of electrons on paramagnetic impurities in the oxide layer. The effective density of states appearing in the formula of tunnel current is determined and the tunnel current is calculated by summing up the contributions of resonance scatterings. The actual appearance of the effect varies greatly and is strongly dependent on the parameter values: (1) For ferromagnetic coupling: resistivity minimum at zero bias, relative amplitude: 0-0.2. (2) For antiferromagnetic coupling: (a) giant resistivity maximum at zero bias, relative amplitude 0-100; (b) local resistivity minimum at zero bias superimposed on a background curve with resistivity maximum [type 2 (a)]. The investigation of tunneling characteristics may be a powerful method to check the resonance scattering amplitude for paramagnetic impurities.",
author = "J. S{\'o}lyom and A. Zawadowski",
year = "1968",
doi = "10.1063/1.2163590",
language = "English",
volume = "39",
pages = "705",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics Publising LLC",
number = "2",

}

TY - JOUR

T1 - On the theory of anomalous tunneling due to paramagnetic impurities

AU - Sólyom, J.

AU - Zawadowski, A.

PY - 1968

Y1 - 1968

N2 - Recently some anomalies have been observed in the characteristics of tunnel diodes at zero bias. Anderson and Suhl have called attention to the resonance scattering of electrons on paramagnetic impurities in the oxide layer. The effective density of states appearing in the formula of tunnel current is determined and the tunnel current is calculated by summing up the contributions of resonance scatterings. The actual appearance of the effect varies greatly and is strongly dependent on the parameter values: (1) For ferromagnetic coupling: resistivity minimum at zero bias, relative amplitude: 0-0.2. (2) For antiferromagnetic coupling: (a) giant resistivity maximum at zero bias, relative amplitude 0-100; (b) local resistivity minimum at zero bias superimposed on a background curve with resistivity maximum [type 2 (a)]. The investigation of tunneling characteristics may be a powerful method to check the resonance scattering amplitude for paramagnetic impurities.

AB - Recently some anomalies have been observed in the characteristics of tunnel diodes at zero bias. Anderson and Suhl have called attention to the resonance scattering of electrons on paramagnetic impurities in the oxide layer. The effective density of states appearing in the formula of tunnel current is determined and the tunnel current is calculated by summing up the contributions of resonance scatterings. The actual appearance of the effect varies greatly and is strongly dependent on the parameter values: (1) For ferromagnetic coupling: resistivity minimum at zero bias, relative amplitude: 0-0.2. (2) For antiferromagnetic coupling: (a) giant resistivity maximum at zero bias, relative amplitude 0-100; (b) local resistivity minimum at zero bias superimposed on a background curve with resistivity maximum [type 2 (a)]. The investigation of tunneling characteristics may be a powerful method to check the resonance scattering amplitude for paramagnetic impurities.

UR - http://www.scopus.com/inward/record.url?scp=36849112399&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=36849112399&partnerID=8YFLogxK

U2 - 10.1063/1.2163590

DO - 10.1063/1.2163590

M3 - Article

AN - SCOPUS:36849112399

VL - 39

SP - 705

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 2

ER -