Werthamer–Helfand–Hohenberg theory

In physics, The Werthamer–Helfand–Hohenberg (WHH) theory was proposed in 1966 by N. Richard Werthamer, Eugene Helfand and Pierre Hohenberg^[1] to go beyond BCS theory of superconductivity and it provides predictions of upper critical field ( $H c2$ ) in type-II superconductors.^[1]^[2] The theory predicts the upper critical field ( $H c2$ ) at 0 K from $T c$ and the slope of $H c2$ at $T c$ .

References

^ ^a ^b Werthamer, N. R; Helfand, E; Hohenberg, P. C (1966). "Temperature and Purity Dependence of the Superconducting Critical Field, Hc2. III. Electron Spin and Spin-Orbit Effects". Physical Review. 147 (1): 295–302. Bibcode:1966PhRv..147..295W. doi:10.1103/PhysRev.147.295.
^ Samuely, P; Szabó, P; Klein, T; Jansen, A. G. M; Marcus, J; Escribe-Filippini, C; Wyder, P (1998). "Upper critical field in Ba1 − xKxBiO3: Magnetotransport vs. Magnetotunneling". Europhysics Letters. 41 (2): 207–212. arXiv:cond-mat/0103183. Bibcode:1998EL.....41..207S. doi:10.1209/epl/i1998-00132-1. S2CID 250852195.

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