Abstract
Detailed electrical transport measurements for 2H-TaSe 2 ( T 0 = 122K) and 2H-NbS 2 (with no CDW transition) have been made using samples of high quality in order to clear the scattering mechanisms in the CDW system by comparing the results at two compounds. The ideal resistivity of 2H-TaSe 2 was found to be expressed by ≈ T 5 ( T < 15 K), ≈ T 2(30 K < T < 100 K) and ≈ AT + B( T > T 0). The results were analyzed by including the additional scattering mechanism due to phase fluctuations of CDW other than normal electron-phonon scattering, on the basis of McMillan's phonon entropy model.
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