T. Maniv et al., ORDER-PARAMETER INDUCED PHASE-SHIFT IN THE DHVA OSCILLATIONS IN TYPE-II SUPERCONDUCTORS, Solid state communications, 101(8), 1997, pp. 621-625
In a pure type-II superconductor under a strong magnetic field every L
andau level around the Fermi energy, which is significantly broadened
by the pair potential at low temperatures, splits into two major magne
tic subbands. Such a splitting reflects the fact that the magnetic flu
x threading a unit cell in the Abrikosov lattice is one half electroni
c flux quantum. This effect is predicted to be observed as a rapid 180
degrees phase shift in the de Haas-van Alphen(dHvA) oscillations just
below H-c2, and is expected to be sensitive to disorder and vortex li
nes motion. (C)1997 Elsevier Science Ltd.