Hall coefficient of TaS2-xSexlayer compounds

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Abstract
The Hall coefficients of several TaS2-xSex layer compounds have been measured as a function of temperature between 4K and 200K. Anomalous changes in RH, which are associated with the occurrence of charge density wave periodic lattice distortion formation, have been observed and the variation of the onset temperature T0 with composition has been obtained. Values of Tc and dTc/dP have been obtained for single-crystal TaSe2 which are higher than those reported for polycrystal material. A strong inverse correlation is found between T0 and the superconducting transition temperature Tc. A comparison between T0 and dTc/dP indicates that the pressure-induced increase of Tc for these compounds is not entirely due to the suppression of the charge density wave, as previously suggested.