Effect of Pressure on the Charge Density Wave Transitions in η‐Mo4O11 Crystal

Abstract

AbstractElectrical resistivity ϱ versus temperature T over 4.2 to 300 K under hydrostatic pressures up to 1.2 GPa, transverse magnetoresistance, and Hall effect at 4.2 K and constant pressure are measured for a quasi‐two‐dimensional crystal of monoclinic η‐Mo4O11. Semiempirical analysis of the ϱ−T curves below the charge density wave (CDW) transition temperatures Tc1 and Tc2 shows that the temperature dependences of the CDW gap energies δ1(T) and δ2(T) follow a single universal curve, independent of applied pressures. The Shubnikov‐de Haas oscillations are also observed in these transport quantities, from which the effect of pressure on the nature of Fermi surfaces of holes and/or electrons associated with the CDW transitions is discussed qualitatively.