Light-Enhanced Spin Fluctuations and d-Wave Superconductivity at a Phase Boundary

ORAL

Abstract

Time-domain techniques have shown the potential of photo-manipulating existing orders and inducing new states of matter in strongly correlated materials. Using time-resolved exact diagonalization, we perform numerical studies of pump dynamics in a Mott-Peierls system with competing charge and spin density waves. A light-enhanced d-wave superconductivity is observed when the system resides near a quantum phase boundary. By examining the evolution of spin, charge and superconducting susceptibilities, we show that a sub-dominant state in equilibrium can be stabilized by photomanipulating charge order to allow superconductivity to appear and dominate. This work provides an interpretation of light-induced superconductivity from the perspective of order competition, and offers a promising approach for designing novel emergent states out of equilibrium.

–

Presenters

  • Yao Wang

    Department of Applied Physics, Stanford University, Harvard Univ, Physics, Harvard University, Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory

Authors

  • Yao Wang

    Department of Applied Physics, Stanford University, Harvard Univ, Physics, Harvard University, Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory

  • Cheng-Chien Chen

    Physics, University of Alabama at Birmingham, Physics, University of Alabama

  • Brian Moritz

    Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, SLAC - Natl Accelerator Lab, SLAC and Stanford University, SLAC National Accelerator Laboratory, Stanford Institute for Materials and Energy Sciences, SLAC National Laboratory, SIMIS, Stanford University, Physics, Stanford University, Stanford Univ, SIMES, SLAC and Stanford University

  • Thomas Devereaux

    Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Stanford Univ, SLAC and Stanford University, SLAC National Accelerator Laboratory, SLAC - Natl Accelerator Lab, Stanford Institute for Materials and Energy Sciences, SLAC National Laboratory, Stanford University, SIMIS, Stanford University, Physics, Stanford University, SLAC National Lab and Stanford University, SIMES, SLAC and Stanford University