Quasi-one-dimensional conductors with a charge density wave

Artemenko, S.N.; Volkov, A.F.; Zaĭtsev-Zotov, S. V.

doi:10.3367/ufnr.0166.199604g.0434

Cited by 13 publications

(14 citation statements)

References 19 publications

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“…The properties of conductors with a CDW have still not been adequately studied, especially at low temperatures. 1 The complexity of the questions and the need to clarify them on more perfect crystals are a constant stimulus for both expanding the range of structures investigated and searching for and obtaining new onedimensional compounds. Evidently, the suggestion 2 that conducting channels consisting of a quasi-one-dimensional alkali metal can form in simple NaCl-type structures under irradiation with high-energy electrons merits attention.…”

Section: Electron Spin Resonance and Nuclear Magnetic Resonance Of Somentioning

confidence: 99%

Electron spin resonance and nuclear magnetic resonance of sodium macrostructures in strongly irradiated NaCl-K crystals: Manifestation of quasi-one-dimensional behavior of electrons

et al. 1998

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Section: Electron Spin Resonance and Nuclear Magnetic Resonance Of Somentioning

confidence: 99%

Electron spin resonance and nuclear magnetic resonance of sodium macrostructures in strongly irradiated NaCl-K crystals: Manifestation of quasi-one-dimensional behavior of electrons

et al. 1998

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“…Photoconduction is one of the most fruitful methods to study the details of the energy structure, current carrier recombination time, and other semiconductor parameters. The similarity of numerous physical properties of the CDW conductors and semiconductors arising from the existence of the gap in the electron state density is well known [3].…”

mentioning

confidence: 99%

Photoconduction and photocontrolled collective effects in the Peierls conductor TaS3

Zaĭtsev-Zotov

Minakova

2004

Jetp Lett.

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Light illumination of thin crystals of CDW conductor TaS3 is found to result in dramatic changes of both linear (G) and nonlinear conduction. The increase of G is accompanied by suppression of the collective conduction, growth of the threshold field ET , and appearance of the switching and hysteretic behavior in the nonlinear conduction. The effects in the nonlinear conduction are associated with increase of CDW elasticity due to illumination that leads in particular to appearance of a relation ET ∝ G 1/3 expected for the one-dimensional pinning. Quasi-one-dimensional (quasi-1D) conductors with charge-density-waves (CDW) [1] are one of the most interesting physical systems with collective electron transport. The interaction between electrons condensed into the CDW dominates in elastic properties of the electron crystal-CDW. The elastic properties of the CDW affect such characteristics of quasi-1D conductors as the value of the threshold field for CDW sliding, E T , phase-correlation length, dielectric constant, et al. In its turn the elastic properties are controlled by quasiparticles (electrons and holes) thermally excited over the Peierls gap in the energy spectrum and screening the electric fields caused by CDW deformations. Thus a variation of the quasiparticle concentration (or the total carrier concentration) may be a tool controlling the properties of CDW conductors. An attempt to vary the total carrier concentration has been undertaken in the field effect experiment [2]. In particular it was found that 1%-change of the total concentration of the current carriers by the transverse electric field leads to 40%-change of the threshold field value. Another well-known way to modify the carrier concentration is excitation of nonequilibrium current carriers by light. For example, illumination of a semiconductor may result in increase of the carrier concentration by orders of magnitude. Such a change can be easily detected as a variation of the conduction (photo-conduction). Photoconduction is one of the most fruitful methods to study the details of the energy structure, current carrier recombination time, and other semiconductor parameters. The similarity of numerous physical properties of the CDW conductors and semiconductors arising from the existence of the gap in the electron state density is well known [3]. Several attempts of experimental search for photocon-duction of CDW materials [4, 5, 6, 7] reveal contradictory results. In Ref. [4, 5] no noticeable photoconduction in TaS 3 was observed. Instead, the bolometric response was found and employed for detailed study of the energy structure in TaS 3. In addition an enhancement of the bolometric response was reported in nonlinear regime Ref. [4]. In Ref. [6] photoinduced CDW conduction was observed in blue bronze K 0.3 MoO 3. The red boundary of the effect was found to correspond to the Peierls gap value. The phenomenon was associated with initiation of the CDW depinning by optically excited single electrons. No light-induced variation of the linear conductio...

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“…Thus, expansion of the sample does not lead to the CDW strain, and there is no ground for any anomalies. Therefore, the mechanical anomalies must originate from individual features of the compounds, such as charge transfer under strain [24,25,26], 3D effects, electron-hole asymmetry [27,28]. These effects can change n 0 under strain or make  deviate from 2/n 0 [26,29].…”

Section: Inrtoductionmentioning

confidence: 99%

“…The first approach is based on the analyses of the hysteresis in the temperature dependence of conductivity, (T). [27,28]. The conductivity is presented as a function of two parameters, q and T. It is implied that q can take different values (in a certain range around the equilibrium) at given T.…”

Section: Experimental Approachesmentioning

confidence: 99%

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Quantization of states and strain-induced transformation of charge-density waves in the quasi-one-dimensional conductorTaS3

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Pokrovskiǐ

2016

Phys. Rev. B

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We report studies of low-field conductivity, , of the orthorhombic TaS 3 samples as a function of strain, . In the Peierls state the () dependencies show hysteresis. A similar hysteresis loop is observed for K 0.3 MoO 3 . For nano-sized TaS 3 samples the () curves show step-like changes associated with the "quantization" of the wave vector, q, of the charge-density wave (CDW). The dependences clearly reveal the change of the q-vector with strain. In contrast with the traditional concept, q is found to increase with sample expansion. This means that the stretch-induced anomalies cannot be explained by the transition of the CDW to fourfold commensurability with the pristine lattice (lock-in transition). Alternatively, we suppose, that at the critical stretch a CDW with larger amplitude and modified q-vector forms. Further, the models describing metastable length states and drop of the Young modulus on CDW depinning in terms of longitudinal CDW strain, require reconsideration. Presumably, transverse effects should be taken into account.

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Quasi-one-dimensional conductors with a charge density wave

Cited by 13 publications

References 19 publications

Electron spin resonance and nuclear magnetic resonance of sodium macrostructures in strongly irradiated NaCl-K crystals: Manifestation of quasi-one-dimensional behavior of electrons

Electron spin resonance and nuclear magnetic resonance of sodium macrostructures in strongly irradiated NaCl-K crystals: Manifestation of quasi-one-dimensional behavior of electrons

Photoconduction and photocontrolled collective effects in the Peierls conductor TaS3

Quantization of states and strain-induced transformation of charge-density waves in the quasi-one-dimensional conductorTaS3

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