CDW conduction study under rf field in monoclinic TaS3

Latyshev, Yu. I.; Minakova, V.E.; Savitskaya, Ya.S.

doi:10.1016/0378-4363(86)90080-x

Cited by 8 publications

(4 citation statements)

References 6 publications

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“…The differences are believed to be a consequence of more perfect crystal structure of m-TaS 3 in comparison with o-TaS 3 . For example, it is known that the RF-field response in m-TaS 3 also is more pronounced than that in o-TaS 3 due to more higher CDW coherence in monoclinic phase of the compound [18]. So, m-TaS 3 is very grace object of research.…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, m-TaS 3 which undergoes two Peierls transitions at T P1 ≈ 240 K and T P2 ≈ 160 K is almost unstudied Peierls conductor. Since the first publication [4] there were only a few papers on this material later [6,14,15,16,17,18]. So the data were very scarce and even the main transport properties of this compound especially at T < 77 K were still unknown.…”

Section: Introductionmentioning

confidence: 99%

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Photoconduction in the Peierls conductor monoclinic TaS3

Minakova

Nasretdinova

Zaĭtsev-Zotov

2015

Physica B: Condensed Matter

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Photoconduction in the monoclinic phase of quasi-one-dimensional conductor TaS 3 has been observed at T < 70 K. It was studied jointly with low-temperature ohmic and non-linear dark conduction. The strong sample quality dependence of both photoconduction and dark conduction at this temperature region has been observed. Together with a similarity of the main features of the photoconduction characteristic of both monoclinic (m-TaS 3 ) and orthorhombic (o-TaS 3 ) samples the following new peculiarities of photoconduction in m-TaS 3 were found: 1) the dependence of the activation energy of photoconduction on temperature, T , 2) the change of the recombination mechanism from the linear type to the collisional one at low T with a sample quality growth, 3) the existence of a fine structure of the electric-field dependence of photoconduction. Spectral study gives the Peierls energy gap value 2∆ * = 0.18 eV.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photoconduction in the Peierls conductor monoclinic TaS3

Minakova

Nasretdinova

Zaĭtsev-Zotov

2015

Physica B: Condensed Matter

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“…Estimates for NbSe 3 based on the mean-field BCS dependence for ⌬(T), showed that ther-mal depinning of the CDW is probable. This interpretation, however, is rather dubious for TaS 3 , where the mean-field approach fails near T P : in highly anisotropic compounds such as TaS 3 and K 0.3 MoO 3 , the onset of the gap near T P does not follow the BCS dependence, 10,11 and the pseudogap does not vanish tens of kelvins above T P . 3,12,13 In the present paper the threshold rounding in thin samples of TaS 3 is reported.…”

Section: Introductionmentioning

confidence: 99%

Contribution of spontaneous phase slippage to linear and nonlinear conduction near the Peierls transition in thin samples ofTaS3

Pokrovskiǐ

Zaĭtsev-Zotov

2000

Phys. Rev. B

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In the Peierls state very thin samples of TaS 3 ͑cross-section area ϳ10 Ϫ3 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 ϳ(2Ϫ4)ϫ10 3 K and apparently reveal the same process. We reject creep of the continuous charge-density waves ͑CDW's͒ 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 .

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“…Estimates for NbSe 3 based on the mean-field BCS dependence for ∆(T ), showed that thermal depinning of the CDW is probable. This interpretation, however, is rather dubious for TaS 3 , where the mean-field approach fails near T P : in highly anisotropic compounds such as TaS 3 and K 0.3 MoO 3 , the onset of the gap near T P does not follow the BCS dependence [10,11], and the pseudogap does not vanish tens of kelvins above T P [3, 12,13].…”

Section: Introductionmentioning

confidence: 99%