De Haas-van Alphen effect in the superconducting state

Anisotropics-wave superconductivity in borocarbidesLuNi2B2CandMaki1, Thalmeier2, Won3 2002Phys. Rev. B

“…It is well known that dHvA oscillations can be seen in the vortex state as well when the quasiparticle damping is much less than the cyclotron frequency 11,30,31 . However in conventional s-wave superconductors the dHvA oscillation becomes invisible when H≤0.8 H c2 .…”

Local Polaronic Effects in Compounds with Atoms of Transition Metals

“…For both V 3 Si and Nb 3 Sn, such estimate gives for the effective mass, m * ≈ (3.3−4)m e . Experimentally, from the temperature dependence of the amplitude of oscillations, it follows m * ≈ (2−3)m e [42,43]. It is rather close to the above keeping in mind that all estimates were obtained in the isotropic BCS model.…”

“…Quite a few oscillations in V 3 Si and Nb 3 Sn are seen in the vortex state down to ∼0.6H c2 [42,43]. Experimentally, there is an uncertainty [43] for selecting those frequencies, F that are present only in the normal state.…”

“…It is remarkable for members of the A15 family that, like in 2H -NbSe 2 , among all the dHvA frequencies there are oscillations with the frequencies observable also below the critical field (see, e.g., [42,43]), as if the carriers on these FS were deprived of any participation in the Cooper pairing. It poses the question which electronic bands in the A15s are actually responsible for the SC phenomenon.…”

Dynamics of a charged particle in a magnetic-flux lattice

“…An important example of magnetic oscillations is the de Haas-van Alphen effect which is used to study Fermi surfaces in metals and, recently, type-II superconductors. [17][18][19][20][21][22] The effect of Landau level broadening, due to finite temperature, impurities, and inhomogeneous magnetic field, on the magnetization of a two-dimensional electron gas was studied by Shonberg. 23 In this paper Landau level broadening due to an additional periodic component of the magnetic field is studied by examining the characteristics of an autocorrelation function ͓see Eq.…”