The magnetoresistance of single-crystal 2H-TaSe2 in the commensurate charge-density-wave state has been measured at 4.2 K in magnetic fields up to 48 kG. The results indicate that the Fermi surface supports open orbits parallel to the  direction for all orientations of magnetic field in the (0001) plane. No evidence of open orbits in other directions was observed.
Fermi-Surface Topology of 2H-TaSe2 at 4.2KPhysical Review B
Publisher's StatementCopyright 1977 American Physical Society. Available on publisher's site at http://link.aps.org/doi/10.1103/PhysRevB.15.1640.
Citation InformationHambourger, Paul D. "Fermi-Surface Topology of 2H-TaSe2 at 4.2K." Physical Review B 15 (1977): 1640-1643.