書誌事項
- 公開日
- 1985-11-10
- DOI
-
- 10.1088/0022-3719/18/31/017
- 公開者
- IOP Publishing
この論文をさがす
説明
The fluctuating valence state of Sm3Se4 has been investigated by measurements of ultrasonic dispersion and AC conductivity. A pronounced frequency dependence of the elastic constants and ultrasonic attenuation near 120K is observed, which is caused by the thermally activated hopping of 4f electrons. The AC resistivity also shows marked frequency and temperature dependences, which are governed by the 4f hopping conduction and the thermally assisted quantum mechanical tunnelling among the localised states in the randomly distributed potentials. The 4f hopping rate determined by the present experiments has the activation-type temperature dependence, tau = tau 0 exp(E0/kT), where tau 0=2.4*10-13 s and the activation energy is E0=0.14 eV.
収録刊行物
-
- Journal of Physics C: Solid State Physics
-
Journal of Physics C: Solid State Physics 18 (31), 5849-5862, 1985-11-10
IOP Publishing