Sliding charge-density wave conductivity in potassium molybdenum bronze

Lynn Schneemeyer, F. J. DiSalvo, R. M. Fleming, J. V. Waszczak

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21 Citations (Scopus)

Abstract

The monoclinic blue-bronze, K0.30MoO3, is an anisotropic metal that undergoes a charge density wave (CDW)-driven phase transition at 180 K, below which nonlinear current-voltage characteristics are observed. In this paper, we examine the anisotropy of the electric and magnetic properties of K0.30MoO3 and their relationship to observed CDW phenomena. We show that the conductivity is highest along the monoclinic b axis and 10 and 100 times lower in two directions perpendicular to b (in the (2 0 1 plane and perpendicular to these planes, respectively). In the CDW state, the conductivity along the b axis is nonlinear when the applied electric field exceeds a small threshold on the order of 50 mV/cm, but is field-independent in perpendicular directions. A periodic response to a dc bias was observed in one small K0.30MoO3 sample, however, the observation of an NbSe3-like response in K0.30MoO3 may depend on sample size or the quality of the electrical contacts to the sample.

Original languageEnglish
Pages (from-to)358-364
Number of pages7
JournalJournal of Solid State Chemistry
Volume54
Issue number3
DOIs
StatePublished - 1 Jan 1984

Fingerprint

Charge density waves
Molybdenum
Bronze
bronzes
molybdenum
Potassium
sliding
potassium
conductivity
Current voltage characteristics
electric contacts
Magnetic properties
Electric properties
Anisotropy
Phase transitions
Metals
Electric fields
magnetic properties
anisotropy
thresholds

Cite this

Schneemeyer, Lynn ; DiSalvo, F. J. ; Fleming, R. M. ; Waszczak, J. V. / Sliding charge-density wave conductivity in potassium molybdenum bronze. In: Journal of Solid State Chemistry. 1984 ; Vol. 54, No. 3. pp. 358-364.
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Sliding charge-density wave conductivity in potassium molybdenum bronze. / Schneemeyer, Lynn; DiSalvo, F. J.; Fleming, R. M.; Waszczak, J. V.

In: Journal of Solid State Chemistry, Vol. 54, No. 3, 01.01.1984, p. 358-364.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Schneemeyer, Lynn

AU - DiSalvo, F. J.

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N2 - The monoclinic blue-bronze, K0.30MoO3, is an anisotropic metal that undergoes a charge density wave (CDW)-driven phase transition at 180 K, below which nonlinear current-voltage characteristics are observed. In this paper, we examine the anisotropy of the electric and magnetic properties of K0.30MoO3 and their relationship to observed CDW phenomena. We show that the conductivity is highest along the monoclinic b axis and 10 and 100 times lower in two directions perpendicular to b (in the (2 0 1 plane and perpendicular to these planes, respectively). In the CDW state, the conductivity along the b axis is nonlinear when the applied electric field exceeds a small threshold on the order of 50 mV/cm, but is field-independent in perpendicular directions. A periodic response to a dc bias was observed in one small K0.30MoO3 sample, however, the observation of an NbSe3-like response in K0.30MoO3 may depend on sample size or the quality of the electrical contacts to the sample.

AB - The monoclinic blue-bronze, K0.30MoO3, is an anisotropic metal that undergoes a charge density wave (CDW)-driven phase transition at 180 K, below which nonlinear current-voltage characteristics are observed. In this paper, we examine the anisotropy of the electric and magnetic properties of K0.30MoO3 and their relationship to observed CDW phenomena. We show that the conductivity is highest along the monoclinic b axis and 10 and 100 times lower in two directions perpendicular to b (in the (2 0 1 plane and perpendicular to these planes, respectively). In the CDW state, the conductivity along the b axis is nonlinear when the applied electric field exceeds a small threshold on the order of 50 mV/cm, but is field-independent in perpendicular directions. A periodic response to a dc bias was observed in one small K0.30MoO3 sample, however, the observation of an NbSe3-like response in K0.30MoO3 may depend on sample size or the quality of the electrical contacts to the sample.

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