Review of the Fröhlich sliding mode in NbSe3

1982 ◽  
Vol 60 (5) ◽  
pp. 757-765 ◽  
Author(s):  
N. P. Ong
Keyword(s):  
Electrical Conductivity ◽  
Charge Density ◽  
Charge Density Wave ◽  
Sliding Mode ◽  
Density Wave ◽  
Theoretical Models ◽  
Wave System ◽  
Niobium Triselenide ◽  
Effect Of Impurities ◽  
Ac Conduction

The anomalous transport properties of the charge-density-wave system niobium triselenide are surveyed. Early experiments on the frequency dependence and non-ohmicity of the electrical conductivity are described together with interpretations using the sliding mode mechanism. The effect of impurities, the non-ohmic Hall effect, conduction noise, and ac conduction are described. Theoretical models which have been proposed arc discussed, together with difficulties from the experimental viewpoint. Lastly, mention is made of recent experiments on NbSe3 as well as other similar systems.

Incommensurate modulated phases of the NbxTa1-xTe4 charge density wave system

1992 ◽  
Vol 50 (1) ◽  
pp. 58-59
Author(s):  
S. Ritchie ◽  
J. C. Bennett ◽  
A. Prodan ◽  
F.W. Boswell ◽  
J.M. Corbett
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Direct Evidence ◽  
Density Wave ◽  
Wave System ◽  
Modulated Phases ◽  
Metal Atoms ◽  
Incommensurate Modulation ◽  
End Members ◽  
Modulation Wave Vector

A continuous sequence of compounds having composition NbxTa1-xTe4; 0 ≤ x ≤ 1 have been studied by electron diffraction and microscopy. Previous studies have shown that the end members of the series, TaTε4 and NbTε4 possess a quasi-one-dimensional character and exhibit charge density wave (CDW) distortions. In these compounds, the subcell structure is tetragonal with axes (a × a × c) and consists of the metal atoms (Nb or Ta) centered within an extended antiprismatic cage of Te atoms. At room temperature, TaTε4 has a commensurate modulation structure with a 2a × 2a × 3c unit cell. In NbTε4, an incommensurate modulation with × ∼ 16c axes is observed. Preliminary studies of the mixed compounds NbxTα1-xTε4 showed a discontinuous jump of the modulation wave vector commensurate to incommensurate when the Nb dopant concentration x, exceeded x ≃ 0.3, In this paper, the nature of the compositional dependence of is studied in greater detail and evidence is presented for a stepwise variation of . This constitutes the first direct evidence for a Devil's staircase in CDW materials.

Spectroscopic signatures of phase transitions in a charge-density-wave system: 1T-TaS2

1992 ◽  
Vol 46 (12) ◽  
pp. 7407-7412 ◽  
Author(s):  
B. Dardel ◽  
M. Grioni ◽  
D. Malterre ◽  
P. Weibel ◽  
Y. Baer ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Wave System ◽  
A Charge ◽  
Spectroscopic Signatures

Temperature hysteresis in dielectric and transport properties of charge density wave system o-TaS3

2005 ◽  
Vol 131 ◽  
pp. 183-184
Author(s):  
D. Dominko ◽  
D. Starešinić ◽  
K. Biljaković ◽  
P. Lunkenheimer ◽  
A. Loidl
Keyword(s):  
Charge Density ◽  
Transport Properties ◽  
Charge Density Wave ◽  
Density Wave ◽  
Temperature Hysteresis ◽  
Wave System

scholarly journals Folded superstructure and degeneracy-enhanced band gap in the weak-coupling charge density wave system 2H−TaSe2

2018 ◽  
Vol 97 (11) ◽  
Author(s):  
Y. W. Li ◽  
J. Jiang ◽  
H. F. Yang ◽  
D. Prabhakaran ◽  
Z. K. Liu ◽  
...  
Keyword(s):  
Charge Density ◽  
Band Gap ◽  
Charge Density Wave ◽  
Weak Coupling ◽  
Density Wave ◽  
Wave System
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