中国物理B ›› 1994, Vol. 3 ›› Issue (6): 445-452.doi: 10.1088/1004-423X/3/6/007

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PROPERTIES OF TEMPERATURE DEPENDENCE OF THRESHOLD IN PURE AND IMPUHITY-DOPED BLUE BRONZES

张一民1, 石兢1, 田德诚1, 田明亮2, 毛志强2, 张裕恒2   

  1. (1)Department of Physics, Wuhan University, Wuhan 430072, China; (2)Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China
  • 收稿日期:1993-05-28 出版日期:1994-06-20 发布日期:1994-06-20
  • 基金资助:
    Project Supported by the National Natural Science Foundation of China, and also by the Education Committee of the State Council through the Foundation of Doctoral Training.

PROPERTIES OF TEMPERATURE DEPENDENCE OF THRESHOLD IN PURE AND IMPUHITY-DOPED BLUE BRONZES

TIAN MING-LIANG (田明亮)a, MAO ZHI-QIANG (毛志强)a, ZHANG YU-HENG (张裕恒)a, ZHANG YI-MIN (张一民)b, SHI JING (石兢)b, TIAN DE-CHENG (田德诚)b   

  1. a Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China; b Department of Physics, Wuhan University, Wuhan 430072, China
  • Received:1993-05-28 Online:1994-06-20 Published:1994-06-20
  • Supported by:
    Project Supported by the National Natural Science Foundation of China, and also by the Education Committee of the State Council through the Foundation of Doctoral Training.

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摘要： Temperature dependence of the threshold of pure and impurity-doped blue bronzes has been studied. It is found that for pare blue bronzes the threshold field near 100K has an anomalous peak, but for impurity-doped samples no anomaly is observed in the range of liquid nitrogen temperature, and the value of the threshold field gradu-ally increases with the decrease of temperature. The results show that in the high-quality pure blue bronzes, there may exist an incommensurate to quasi-commensurate transition near 100K. But for the impurity-doped or "dirty" pure samples, such an incommensurate to quasi-commensurate transition near 100K can be extensively re-strained by impurities or defects, which leads to a pure incommensurate CDW in a wide temperature range.

Abstract: Temperature dependence of the threshold of pure and impurity-doped blue bronzes has been studied. It is found that for pare blue bronzes the threshold field near 100K has an anomalous peak, but for impurity-doped samples no anomaly is observed in the range of liquid nitrogen temperature, and the value of the threshold field gradu-ally increases with the decrease of temperature. The results show that in the high-quality pure blue bronzes, there may exist an incommensurate to quasi-commensurate transition near 100K. But for the impurity-doped or "dirty" pure samples, such an incommensurate to quasi-commensurate transition near 100K can be extensively re-strained by impurities or defects, which leads to a pure incommensurate CDW in a wide temperature range.

中图分类号:  (Charge-density-wave systems)

  • 71.45.Lr
64.70.Rh (Commensurate-incommensurate transitions) 72.15.Nj (Collective modes (e.g., in one-dimensional conductors))