Anisotropic Node Removal in d-wave Superconductors under Magnetic Field
Ferrer, Efrain J. · de la Incera, Vivian
Original · EN
A phenomenological model that considers different secondary idxy gap amplitudes and quasiparticle effective charges for each nodal direction, is proposed to explain the observed anisotropic node removal by a magnetic field in high-Tc cuprates. Two independent parity-breaking condensates <ΨᵢΨᵢ> develop, implying the induction of a magnetic moment per each nodal direction. The model outcomes are in agreement with the experimentally found relation Δᵢ √B. The secondary gap vanishes through a second-order phase transition at a critical temperature whose value for underdoped nodal-oriented YBCO is estimated to be 6K for a field of 15 T.
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