Advances in Condensed Matter Physics / 2019 / Article / Tab 3

Review Article

Survey of the Thermodynamic Properties of the Charge Density Wave Systems

Table 3

Materials (1D CDW), quasi-one-dimensional conductors K0.3MoO3, NbSe3, (TaSe4)2I, and TTF-TCNQ. Molar volumes are given in cm3, specific heat discontinuities in J/molK, thermal expansion discontinuities in K−1, elastic velocity discontinuities in , and measured and calculated elastic constants in GPa and ratios.

MaterialsMolar volume
cm3
TCDW
(K)
Specific heat

J/molK
Thermal expansion
coefficient
(K−1)
Elastic velocity decrease
Elastic constant
GPa
calculated

GPa
Ratio
calculated
/measured

K0.3MoO336.31803.6 [30]
2
[34]
axis
7x10−6 [31]
axis
-0.02 [31]
axis
Young modulus
250 [31]
60 [33]
250 [31]~1
~4

(TaSe4)2I1802600.83 [40] axis
-1x10−6 [38]
axis
-0.001 [37]
C33=115 [37]37~0.3

NbSe340.8145
58
3 [26]
0.4
[26]
in plane
-2x10−6 [25]
-0.0003
[27]
550
[27]
70~0.1

TTF-TCNQ250552.5
[35]
No discontinuity [36]axis
-0.01 [37]
~0 [36]
Young modulus E~60 [37]
E~15 [36]

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