Thermoelectric power properties of quasi-two dimensional potassium/sodium purple bronze crystals A0.9MoO17(A = K, Na)

Ming Liang Tian, Zhiqiang Mao, Rui Ping Wang, Ye Bin Wang, Yu Heng Zhang

Research output: Contribution to journalArticle

Abstract

Temperature dependence of thermoelectric power S in quasi-two dimensional potassium/sodium purple bronzes has been studied in the temperature range 80-280 K. It's found that: (1) in potassium purple bronze, S has a sign change at 105 K, above which S is the small negative value and can be described by the form of S = AT + B, the dominant carriers are free electrons, in the CDW state below 105 K, S is positive, and can be described by S = A′T + B′/T, the phonon-drag of the carriers is dominant; (2) in sodium purple bronze, in the studied temperature range above 80 K, S has a good linear relation with temperature, no phase transition was observed, electrons may be the dominant carriers. In addition, the origins of the difference of the properties for both these isostructural crystals are also discussed briefly.

Original languageEnglish (US)
Pages (from-to)127-128
Number of pages2
JournalWuli Xuebao/Acta Physica Sinica
Volume46
Issue number1
StatePublished - Dec 1 1997

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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