Phenomenological approach of the thermodynamic properties of the charge density wave systems

The properties of the specific heat and elastic stiffness components at the charge density wave phase transition in several one-dimensional and two-dimensional materials are examined. Here we show that the thermodynamic properties of the rare earth tritelluride RTe3 (R = Te, Er) and Lu5Ir4Si10 compounds can be explained in the framework of a standard mean field Landau theory. The amplitude of the experimental-specific heat jump measured at the charge density wave (CDW) phase transition increases with the transition temperature TCDW. The amplitude of the experimental discontinuity of the longitudinal elastic constants measured at the CDW phase transition scales onto a single curve. The Landau approach is discussed as well as experimental results.

Automated summary

The properties of specific heat and elastic stiffness components at the charge density wave phase transition in several one-dimensional and two-dimensional materials were examined. It was found that the thermodynamic properties of specific compounds could be explained using a standard mean field Landau theory. Experimental results showed that the amplitude of specific heat jump and longitudinal elastic constants at the CDW phase transition followed a certain pattern. The Landau approach and experimental results were discussed.