New type of superconductivity in very high magnetic fields
Zlatko Tes̆anović, Mark Rasolt
DOI 10.1103/PhysRevB.39.2718 · Physical Review B
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Abstract
A new superconducting state is proposed that can coexist with very high magnetic fields, provided that Pauli pair breaking is absent. Such a state may arise, for example, in multivalley semiconductors and semimetals, where the valley degrees of freedom play the role of the electron spins in the usual BCS theory. Below the transition temperature, such superconductors show no resistance to a current flowing in the direction parallel to the field; in the plane perpendicular to the field, under suitable conditions, their conducting properties will be reminiscent of a quantum liquid of bosons of charge 2e. There is no orbital upper critical field for such superconductors.
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