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- W1644170442 abstract "Abstract Ultrasonic measurements for a valence-fluctuation compound Sm3Te4 have been performed. Considerable dispersion around 120 K due to a thermal hopping motion of 4f-electron among Sm2+ and Sm3+ has been observed in the ultrasonic attenuation. The relaxation time of the charge fluctuation 2πτ becomes infinite at low temperatures following as τ=τ0exp(E/kBT), here 2πτ0=2.5×10−13 s and E=0.136 eV. The ln T dependence of the elastic constants similar to a two-level system of amorphous glass compounds is observed at low temperatures below 15 K. These results indicate a two-level system of the 4f-electron tunneling in the random potential of Sm2+ and Sm3+ ions due to the charge glass state." @default.
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- W1644170442 date "2000-06-01" @default.
- W1644170442 modified "2023-10-17" @default.
- W1644170442 title "Charge fluctuation in Sm3Te4" @default.
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- W1644170442 doi "https://doi.org/10.1016/s0921-4526(99)01130-8" @default.
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