Quantum interference and Shubnikov–de Haas oscillations in β″-(ET)4(H3O)[Fe(C2O4)3]·C6H4Cl2 under pressure

Magnetoresistance oscillations of the quasi-two dimensional charge transfer salt β″-(ET)4(H3O)[Fe(C2O4)3]·C6H4Cl2 are investigated in pulsed magnetic fields of up to 55 T, under an applied pressure of 0.5 GPa. As it is the case at ambient pressure, data are in agreement with the coexistence of a Shubnikov–de Haas orbit and a quantum interference path with the same cross section. As a result, oscillations are observed at temperatures as high as 25 K.