Loop current order and d-wave superconductivity: Some observable consequences
Name
Allais-2012-Loop current order and d-wave superconductivity.pdf
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968.15 KB
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Author(s)
Allais, Andrea
Todadri, Senthil
Date Issued
July 2012
Journal
Physical Review B
Publisher
American Physical Society
Citation
Allais, Andrea, and T. Senthil. “Loop Current Order and D-wave Superconductivity: Some Observable Consequences.” Physical Review B 86.4 (2012). ©2012 American Physical Society
Version
Final published version
Abstract
Loop current order has been reported in the pseudogap regime of a few cuprate systems in polarized neutron scattering experiments. Here we study several observable consequences of such order in the d-wave superconducting state at low T. The symmetries of the loop order remove degeneracy between momenta k[superscript →] and −k[superscript →]. Consequently there is a remnant Bogoliubov Fermi surface in the superconducting state. Bounds on the possible existence of such a Fermi surface may be placed from existing data. Detecting such a Fermi surface will be a very useful confirmation of the existence of loop order in various cuprates. We show through explicit calculations that the Bogoliubov Fermi surface does not display quantum oscillations in a magnetic field consistent with natural expectations. Inclusion of a field-induced spin stripe order reconstructs the Bogoliubov Fermi surface to develop pockets which then show quantum oscillations in the superconducting state. Difficulties with interpreting quantum oscillation data in the cuprates along these lines are pointed out.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.86.045118
