The Temperature Dependent Shear-Strain of the (NbSe$\bf_4$)$\bf_{10}$I$\bf_3$ Compound, a Quasi-One-Dimensional Charge Density Wave System, below the Peierls Transition

1996 ◽  
Vol 6 (2) ◽  
pp. 265-275 ◽  
Author(s):  
Z. Vučić ◽  
J. Gladić ◽  
C. Haas ◽  
J. L. De Boer
2004 ◽  
Vol 66 (3) ◽  
pp. 385-391
Author(s):  
Z. R Struzik ◽  
A Glatz ◽  
M. S Li

1993 ◽  
Vol 07 (23n24) ◽  
pp. 4045-4108 ◽  
Author(s):  
JEAN DUMAS ◽  
CLAIRE SCHLENKER

The physical properties of the low dimensional molybdenum bronzes showing charge density wave (CDW) instabilities are reviewed. The mechanisms of the Peierls transition, CDW and spin density wave (SDW) instabilities are first introduced. The properties of the quasi-one-dimensional (1D) blue bronze, A 0.30 MoO 3, including non linear transport due to the depinning of the incommensurate CDW, are described. The transport properties and the effect of pressure on the superconducting properties of the quasi-1D Li purple bronze Li 0.9 Mo 6 O 17 are reported. Finally, one presents the properties of the commensurate CDW state of the quasi-2D purple bronze KMo 6 O 17, especially under high magnetic field and hydrostatic pressure.


Author(s):  
S. Ritchie ◽  
J. C. Bennett ◽  
A. Prodan ◽  
F.W. Boswell ◽  
J.M. Corbett

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.


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