2012/10/31 by Chen-Hsuan Hsu, Sudip Chakravarty · 15 citations
Physics and Astronomy · #Charge (physics) #Combinatorics #Condensed matter physics #Excited state #Fermion #Image (mathematics) #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Rare-earth and actinide compounds #Singlet state #Skyrmion #Spin (aerodynamics) #Superconductivity #Texture (cosmology) #Topological Materials and Phenomena #Topological quantum number #Topology (electrical circuits) #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.87.085114
published in Physical Review B 87(8) (American Physical Society) · 11 pages, added a new appendix for the derivation of the non-linear sigma model
arxiv created 2012/12/06 · openalex publication_date 2013/02/13 · arxiv updated 2013/02/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A higher-angular-momentum (\ensuremathℓ=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 the skyrmionic superconducting condensate likely leads to deconfined quantum critical points. We suggest connections of this exotic state to electronic materials that are strongly correlated, such as the heavy-fermion URu2Si2. At the very least, we provide a concrete example in which topological order and broken symmetry are intertwined, which can give rise to non-BCS superconductivity.