Abstract
The pulsed-laser induced “transient thermoelectric effect (TTE)” under electric and magnetic fields has been measured for the CDW material γ-Mo4O11. The photo-induced TTE voltages decay with the characteristic relaxation times τi (i=2 and 3) for thermal diffusion of two types of holes. In the CDW state [T<Tc(=100 K)], the relaxation times τi oscillate periodically with the magnetic field, and the corresponding relaxation amplitudes aichange stepwise at the minima in the τi-Bcurves. These oscillation periods ΔBi(=0.56–0.68 T) are independent of the electric field E, and these increase appreciably with temperature above 40 K, while the initial phase differences θiincrease linearly with E.Possible mechanisms for such anomalous oscillations of the relaxation times are discussed from classical and conventional quantum mechanical viewpoints; however, its origin is uncertain at the moment.
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