scholarly journals Glass transition in charge-density-wave systems o-TaS3 and K0.3MoO3

2002 ◽  
Vol 12 (9) ◽  
pp. 15-18
Author(s):  
D. Staresinic ◽  
K. Biljakovic ◽  
W. Brutting ◽  
K. Hosseini ◽  
P. Monceau
Keyword(s):  
Glass Transition ◽  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Relaxation Times ◽  
Low Frequency ◽  
Activation Energies ◽  
Temperature Evolution ◽  
One Dimensional ◽  
Free Carriers

We present experimental evidence for the glass transition in charge density wave (CDW) superstructure of two quasi one-dimensional systems, o-TaS3 and K0.3MoO3. Low frequency dielectric response of both systems exhibits typical glass-like phenomenology, featuring the splitting of the relaxational spectrum into two processes on decreasing the temperature and the subsequent freezing of primary or a process at finite temperature of glass transition Tg. Below Tg secondary, or β process becomes dominant. Activation energies obtained from the temperature evolution of the characteristic relaxation times of a and β processes correspond to the activation energies of the temperature evolution of the DC conductivity above and below Tg respectively. The results are discussed in respect to the relevant theories of low frequency CDW dynamics, with the emphasis on the Coulomb hardening of CDW in absence of screening by free carriers. An attempt to understand observed differences in freezing of CDW in o-TaS3 and K0.3MoO3 is made.

Deformation of sliding charge density wave in Rb0.3MoO3

2002 ◽  
Vol 12 (9) ◽  
pp. 323-324
Author(s):  
D. Le Bolloc'h ◽  
S. Ravy ◽  
P. Senzier ◽  
C. Pasquier ◽  
C. Detlefs
Keyword(s):  
Charge Density ◽  
Correlation Length ◽  
Charge Density Wave ◽  
Density Wave ◽  
Relaxation Times ◽  
X Ray Diffraction ◽  
Electrical Field ◽  
One Dimensional ◽  
High Q ◽  
The One

The correlation length of the charge density wave ordering in Rb0.3, MoO, has been studied by x-ray diffraction under electric field applied along the one-dimensional axis. The (10, 0.25, -5.5) satellite reflection has been measured in 3D, using high Q-resolution available at the ESRF. Under electrical field, the satellite reaches two stable positions depending on the temperature. It can switch from one to another as a function of the temperature and the current with very long relaxation times ($\rm 10^{th}$ of minutes). After several cycling with T and E, the satellite reflection is found to shift in the 3 main directions. The width of the satellite is reduced by a factor of two in the k-direction and an increase of the transverse correlation length is observed in the two others: the ordered domains look elongated, reaching until 5000 Å in the direction of the applied field and around 1OOO Å, in the perpendicular directions.

Thermal hysteresis in low frequency dielectric response of charge density wave systems TaS3 and K0.3Mo03

2002 ◽  
Vol 12 (9) ◽  
pp. 313-314
Author(s):  
A. Akrap ◽  
D. Staresinic ◽  
K. Biljakovic ◽  
P. Lunkenheimer ◽  
A. Loidl
Keyword(s):  
Glass Transition ◽  
Low Temperature ◽  
Charge Density ◽  
Dielectric Response ◽  
Charge Density Wave ◽  
Thermal Hysteresis ◽  
Density Wave ◽  
Low Frequency ◽  
Dc Conductivity ◽  
Temperature Cycling

Low frequency dielectric response of charge density wave systems K0.3MoO3 and o-TaS3 shows hysteresis on temperature cycling. The closing of the hysteresis at low temperature coincides in both systems with the closing of the hysteresis in DC conductivity and corresponds to the temperature of the glass transition observed in dielectric response of these two systems. AC conducitivity is higher on heating, while DC conductivity is lower, i.e. two loops have opposite directions. Higher AC conducitivity (or dielectric response) is a consequence of more corrugated CDW phase on heating.

Free carriers effect on the charge density wave dynamics in a one-dimensional conductor

2005 ◽  
Vol 348 (1-2) ◽  
pp. 71-76 ◽  
Author(s):  
M. Qjani ◽  
A. Arbaoui ◽  
Y. Boughaleb ◽  
J. Dumas
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
One Dimensional ◽  
Wave Dynamics ◽  
Free Carriers

High-frequency, "quantum" and electromechanical effects in quasi-one-dimensional charge density wave conductors

2013 ◽  
Vol 183 (1) ◽  
pp. 33-54 ◽  
Author(s):  
Vadim Ya. Pokrovskii ◽  
Sergey G. Zybtsev ◽  
Maksim V. Nikitin ◽  
Irina G. Gorlova ◽  
Venera F. Nasretdinova ◽  
...  
Keyword(s):  
Charge Density ◽  
High Frequency ◽  
Charge Density Wave ◽  
Density Wave ◽  
One Dimensional ◽  
Electromechanical Effects

scholarly journals Phase slip process and charge density wave dynamics in a one dimensional conductor

2017 ◽  
Vol 7 ◽  
pp. 3277-3280 ◽  
Author(s):  
N. Habiballah ◽  
M. Zouadi ◽  
A. Arbaoui ◽  
M. Qjani ◽  
J. Dumas
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Phase Slip ◽  
One Dimensional ◽  
Wave Dynamics
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