Quantum Oscillation in WTe₂ Flakes

WTe₂ is theoretically predicted to have two pairs of electron and hole pockets along Γ-X direction, which have been observed in ARPES. However, ARPES also revealed an additional hole pocket which is very closed to Γ point, the center of Brillouin zone. The two predicted pairs of Fermi pockets have already been verified in transport measurements but there's few evidence of the existence of the hole pocket at Γ point. Here we report the quantum oscillations study in semimetallic WTe₂ flakes with different thickness. An oscillation signal from the hole pocket at Γ point is very likely to be observed.