Survey of the Thermodynamic Properties of the Charge Density Wave Systems

Table 1

Materials (2D CDW) TbTe₃, HoTe₃, and ErTe₃ rare earth tritellurides. 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.

Materials	Molar volume; cm^3	TCDW; K	Specific heat; J/molK	Thermal expansion; coefficient along the axis; ∆αc (K^−1)	Elastic velocity; decrease; ∆V/V	Elastic constant; Measured; GPa	calculated; ρV^2; GPa	Ratio; Calculated; /measured
TbTe3	71	330	3; [41]	-1.2x10^−5 [8]	along the or axis; -0.01 [41]	C33~ 50	25	~0.5
HoTe3	70.4	280; 120			Along the axis; -0.025 [43]; -0.001	C33~ 50
ErTe3	69.7	260; 150	1; [42]; 0.5	-3.5x10^−6 [8]	along the or axis; -0.015 [42]; -0.001	C33~ 50	20	~0.4