Electrical Properties of a Quasi-One-Dimensional Nb_3Te_4 Single Crystal
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概要
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The electrical resistance and thermoelectric power of Nb_3Te_4 were measured along the quasi-one-dimensional c-axis. Below about 100 K, the resistivity follows the form T^<2-2>, suggesting the electron-electron Umklapp process for charge carrier scattering. Around 38 K, there is a resistivity swelling which would be related to the charge-density-wave phase transition. Anomalies in the thermopower are observed below 150 K. The transition temperature to superconductivity is 2.3 K, and the upper critical magnetic field for type-II superconductivity versus temperature is linear in the temperature range 2.3〜2.0 K. The coherence lengths at 0 K parallel and perpendicular to the c-axis are estimated as 750 Å and 69 Å, respectively. The effective mass ratio perpendicular and parallel to the c-axis at 2.0 K is 115±10, which indicates that this material is strongly anisotropic.
- 社団法人応用物理学会の論文
- 1984-07-20
著者
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Nakada Ichiroh
The Institute For Solid State Physics The University Of Tokyo
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Ishihara Yutaka
Faculty Of Science Kanazawa University
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