Electron-electron interaction in quasi-one-dimensional cobalt nanowires capped with platinum: Low-temperature magnetoresistance measurements

被引：12

作者：

Brands, M. ^{[1
]}

Hassel, C. ^{[1
]}

Carl, A. ^{[1
]}

Dumpich, G. ^{[1
]}

机构：

[1] Univ Duisburg Gesamthsch, Fachbereich Phys, D-47048 Duisburg, Germany

来源：

PHYSICAL REVIEW B | 2006年 / 74卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.74.033406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have measured the low-temperature magnetoresistance of single cobalt nanowires with various widths ranging between 40 nm and 2 mu m prepared by electron beam lithography. The wires are protected in situ with 2 nm platinum to prevent oxidation. The temperature dependence of the resistance shows a logarithmic increase to low temperatures which is attributed to enhanced electron-electron interactions in two dimensions. The strength of interaction effects increases with decreasing width of the wires and a transition to a quasi-one-dimensional behavior is observed. We do not find any contribution due to weak electron localization in agreement with previous results on similar carbon covered nanowires.

引用

页数：4

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