Observation of giant Hall effect in non-magnetic cermets

X. X. Zhang; H. Liu; A. B. Pakhomov

doi:10.1016/S0921-4526(99)00674-2

Observation of giant Hall effect in non-magnetic cermets

X. X. Zhang^*, H. Liu, A. B. Pakhomov

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

12 Scopus citations

Abstract

We study the Hall coefficient over a wide temperature range in co-sputtered Cu:SiO₂ samples with metal volume fraction in the range of 0.45≤x≤0.8. With decreasing metal volume fraction x, the samples change from metal to insulator and the Hall coefficient R increases drastically. A maximum has been observed at x = 0.51, which is approximately 700 times larger than that at x = 0.8. This enhancement far exceeds the factor of 20, which can be derived from the classical percolation (finite size scaling) theory. Based on these observations, we conclude that the non-magnetic GHE arises most probably from quantum interference effects on the mesoscopic scale.

Original language	English (US)
Pages (from-to)	81-83
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	279
Issue number	1-3
DOIs	https://doi.org/10.1016/S0921-4526(99)00674-2
State	Published - Apr 2000
Externally published	Yes
Event	The 5th International Conference on Electrical Transport and Optical Properties of Inhomogeneous Media (ETOPIM5) - Kowloon Tong, Hong Kong Duration: Jun 21 1999 → Jun 25 1999

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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title = "Observation of giant Hall effect in non-magnetic cermets",

abstract = "We study the Hall coefficient over a wide temperature range in co-sputtered Cu:SiO2 samples with metal volume fraction in the range of 0.45≤x≤0.8. With decreasing metal volume fraction x, the samples change from metal to insulator and the Hall coefficient R increases drastically. A maximum has been observed at x = 0.51, which is approximately 700 times larger than that at x = 0.8. This enhancement far exceeds the factor of 20, which can be derived from the classical percolation (finite size scaling) theory. Based on these observations, we conclude that the non-magnetic GHE arises most probably from quantum interference effects on the mesoscopic scale.",

author = "Zhang, {X. X.} and H. Liu and Pakhomov, {A. B.}",

year = "2000",

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doi = "10.1016/S0921-4526(99)00674-2",

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note = "The 5th International Conference on Electrical Transport and Optical Properties of Inhomogeneous Media (ETOPIM5) ; Conference date: 21-06-1999 Through 25-06-1999",

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TY - JOUR

T1 - Observation of giant Hall effect in non-magnetic cermets

AU - Zhang, X. X.

AU - Liu, H.

AU - Pakhomov, A. B.

PY - 2000/4

Y1 - 2000/4

N2 - We study the Hall coefficient over a wide temperature range in co-sputtered Cu:SiO2 samples with metal volume fraction in the range of 0.45≤x≤0.8. With decreasing metal volume fraction x, the samples change from metal to insulator and the Hall coefficient R increases drastically. A maximum has been observed at x = 0.51, which is approximately 700 times larger than that at x = 0.8. This enhancement far exceeds the factor of 20, which can be derived from the classical percolation (finite size scaling) theory. Based on these observations, we conclude that the non-magnetic GHE arises most probably from quantum interference effects on the mesoscopic scale.

AB - We study the Hall coefficient over a wide temperature range in co-sputtered Cu:SiO2 samples with metal volume fraction in the range of 0.45≤x≤0.8. With decreasing metal volume fraction x, the samples change from metal to insulator and the Hall coefficient R increases drastically. A maximum has been observed at x = 0.51, which is approximately 700 times larger than that at x = 0.8. This enhancement far exceeds the factor of 20, which can be derived from the classical percolation (finite size scaling) theory. Based on these observations, we conclude that the non-magnetic GHE arises most probably from quantum interference effects on the mesoscopic scale.

UR - http://www.scopus.com/inward/record.url?scp=0033908061&partnerID=8YFLogxK

U2 - 10.1016/S0921-4526(99)00674-2

DO - 10.1016/S0921-4526(99)00674-2

M3 - Conference article

AN - SCOPUS:0033908061

SN - 0921-4526

VL - 279

SP - 81

EP - 83

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 1-3

T2 - The 5th International Conference on Electrical Transport and Optical Properties of Inhomogeneous Media (ETOPIM5)

Y2 - 21 June 1999 through 25 June 1999

ER -

Observation of giant Hall effect in non-magnetic cermets

Abstract

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