Charge-2e skyrmion condensate in a hidden-order state

  title={Charge-2e skyrmion condensate in a hidden-order state},
  author={Chen-Hsuan Hsu and Sudip Chakravarty},
  journal={Physical Review B},
A higher angular momentum ($\ell =2$) $d$-density wave, a mixed triplet and a singlet, interestingly, admits skyrmionic textures. The Skyrmions carry charge $2e$ and can condense into a spin-singlet s-wave superconducting state. In addition, a charge current can be induced by a time-dependent inhomogeneous spin texture, leading to quantized charge pumping. The quantum phase transition between this mixed triplet $d$-density wave and skyrmionic superconducting condensate likely leads to… 
A Study of d-DensityWave States in Strongly Correlated Electron Systems
Particle-hole condensates in the angular momentum $l=2$ channel, known as $d$-density wave orders, have been suggested to be realized in strongly correlated electron systems. In this dissertation, we
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Competing Orders and Anomalies
  • E. Moon
  • Physics, Medicine
    Scientific reports
  • 2016
By applying the matching condition, it is shown massless excitations are enforced by the anomalies in a whole phase diagram in sharp contrast to the case of the Landau-Ginzburg-Wilson theory which only has massive excitations in symmetric phases.
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Six different experiments are reviewed: ARPES, quantum oscillations, neutron scattering, RXD, optical spectroscopy and STM/STS, which establish the consistencies among these experiments when viewed through the Fermi-surface nesting, folding and gapping framework as predicted by DFT.
Mechanism of skyrmion condensation and pairing for twisted bi-layer graphene
Dian Jing, Alexander Conkey Tyner, Pallab Goswami 1 Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208 2 Department of Chemical and Biological Engineering, Northwestern