Synchronized Phase Slips in a Mesoscopic Charge-Density-Wave System

2003 ◽  
Vol 72 (8) ◽  
pp. 1835-1838 ◽  
Author(s):  
Yositake Takane
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Wave System ◽  
Phase Slips

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

Dynamics of charge density wave phase-slips in mesoscopic samples

2002 ◽  
Vol 12 (9) ◽  
pp. 165-168
Author(s):  
S. N. Artemenko
Keyword(s):  
Experimental Study ◽  
Theoretical Model ◽  
Charge Density ◽  
Qualitative Agreement ◽  
Charge Density Wave ◽  
Temporal Evolution ◽  
Density Wave ◽  
Thermal Fluctuations ◽  
Charge Density Wave Phase ◽  
Phase Slips

Theoretical model of current conversion from normal to collective current in mesoscopic samples of CDW conductors is presented. The current conversion is described in terms of phase slips (PS) induced by strain of the CDW and stimulated by thermal fluctuations. Kernels of PS situated near contacts are surrounded by long-range perturbations of the CDW phase. If spacing between contacts is shorter than decaying length of these perturbations then temporal evolution of PS at different contacts becomes correlated, and PS voltage decreases with spacing between the contacts decreasing. The results are in qualitative agreement with experimental study of current conversion in submicron NbSe3 wires.

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

Dimensional crossover of quantum nucleation processes in charge-density-wave phase slips

1998 ◽  
Vol 57 (4) ◽  
pp. R2003-R2005 ◽  
Author(s):  
Noriyuki Hatakenaka ◽  
Masato Shiobara ◽  
Ken-ichi Matsuda ◽  
Satoshi Tanda
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Dimensional Crossover ◽  
Wave Phase ◽  
Charge Density Wave Phase ◽  
Quantum Nucleation ◽  
Phase Slips
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