Transport properties of the quasi two-dimensional conductor (PO2)4 (WO3)2m m=5 with 5/5/5 regular structure

Abstract The conductors (PO 2 ) 4 (WO 3 ) 2m show CDW type electronic instabilities. We report electrical properties of the m = 5 crystal variety made of a regular 5/5/5 stacking of WO 3 layers. An anomaly at T~60K is observed in the electrical resistivity, Hall coefficient and thermoelectric power. The origin of the anomaly is discussed.