Temperature dependence of the second threshold field for rubidium blue bronze Rb0.3MoO3 |
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Authors: | Rui Xiong Dahua Li Changzheng Li Wufeng Tang |
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Affiliation: | a Department of Physics, Wuhan University, Wuhan, 430072, China b Key Lab of Acoustic and Photonic Materials and Devices, Ministry of Education, Wuhan, 430072, China c International Center for Material Physics, CAS, Shenyang, 110016, China |
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Abstract: | We have investigated the threshold properties of Rubidium blue bronze Rb0.3MoO3 under high dc electric field in a large temperature range 20-150 K. The second threshold fields have been observed at temperature up to 102.4 K, and have quasi-linear relationships with temperatures 20-45 K and 55-100 K, respectively. A novel crossover platform has been found firstly in the temperature dependence of the second threshold field ET2 at about 45-55 K. The results indicate that the dynamical behavior of the second threshold effects may originate from different mechanisms. We suggest that the highly conducting state at 20-45 K and 55-100 K result from the undamped sliding motion of rigid CDW and current inhomogeneity, respectively. |
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Keywords: | 71.45. Lj 72.15. Nj |
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