Contribution of spontaneous phase slippage to linear and nonlinear conduction near the Peierls transition in thin samples of TaS3

Article

关键词: CHARGE-DENSITY-WAVE;    NIOBIUM TRISELENIDE;    SMALL SPECIMENS;    FROHLICH CONDUCTION;    THRESHOLD;    FLUCTUATIONS;    K0.3MOO3;    O-TAS3;    CREEP;    SYSTEMS;   

DOI  :  10.1103/PhysRevB.61.13261

来源: SCIE

【 摘 要 】

In the Peierls state very thin samples of TaS3 (cross-section area similar to 10(-3) mu m(2)) are found to demonstrate smearing of the I-V curves near the threshold field. With approaching the Peierls transition temperature, T-P, the smearing evolves into smooth growth of conductance from zero voltage interpreted by us as the contribution of fluctuations to the nonlinear conductance. We identify independently the fluctuation contribution to the linear conductance near T-P. Both linear and nonlinear contributions depend on temperature with close activation energies similar to(2-4) x 10(3) K and apparently reveal the same process. We reject creep of the continuous charge-density waves (CDW's) as the origin of this effect and show that it is spontaneous phase slippage that results in creep of the CDW. A model is proposed, accounting for both the linear and nonlinear parts of the fluctuation conduction up to T-P.

【 授权许可】

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