Suppression of the magneto resistance in high electric fields of polyacetylene nanofibers

被引：11

作者：

Choi, A. ^{[1
]}

Lee, H. J. ^{[1
]}

Kaiser, A. B. ^{[2
]}

Jhang, S. H. ^{[1
]}

Lee, S. H. ^{[1
]}

Yoo, J. S. ^{[1
]}

Kim, H. S. ^{[1
]}

Nam, Y. W. ^{[1
]}

Park, S. J. ^{[1
]}

Yoo, H. N. ^{[1
]}

Aleshin, A. N. ^{[1
,3
]}

Goh, M. ^{[4
]}

Akagi, K. ^{[4
]}

Kaner, R. B. ^{[5
]}

Brooks, J. S. ^{[6
]}

Svensson, J. ^{[7
]}

Brazovskii, S. A. ^{[8
]}

Kirova, N. N. ^{[9
]}

Park, Y. W. ^{[1
]}

机构：

[1] Seoul Natl Univ, Dept Phys & Astron, Nano Syst Inst Natl Core Res Ctr, Seoul 151747, South Korea

[2] Victoria Univ Wellington, SCPS, MacDiarmid Inst Adv Mat & Nanotechnol, Wellington, New Zealand

[3] Russian Acad Sci, AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

[4] Kyoto Univ, Grad Sch Engn, Dept Polymer Chem, Kyoto 6158510, Japan

[5] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA

[6] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA

[7] Gothenburg Univ, Dept Phys, SE-41296 Gothenburg, Sweden

[8] Univ Paris 11, LPTMS CNRS, F-91405 Orsay, France

[9] Univ Paris 11, CNRS, UMR 8502, Phys Solides Lab, F-91405 Orsay, France

来源：

SYNTHETIC METALS | 2010年 / 160卷 / 11-12期

关键词：

Polyacetylene nanofiber; Magneto resistance; Spinless charged soliton; CONDUCTING POLYMERS; DOPED POLYACETYLENE; TRANSPORT; SOLITONS;

D O I：

10.1016/j.synthmet.2010.04.014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present results of non-linear magneto resistance (MR) of polyacetylene nanofibers in high magnetic field up to H = 30 T at low temperature T = 1.5 K. The MR was proven to be of the spin origin: it reaches 16% at highest H. Unexpectedly, the MR was suppressed by increasing electric field E. vanishing at E greater than or similar to 5 x 10(4) V/cm. It is understood that the doping induced spinless charged soliton pairs, which are initially confined to a certain distance because of the interchain phase correlations, and are deconfined in high electric fields, resulting in a vanishing magneto resistance (VMR). The role of the specific, degenerate ground state of the polyacetylene is confirmed by parallel studies of the different magneto resistances of polyaniline nanofibers which contrarily is not affected by the electric field. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1349 / 1353

页数：5

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