Wavelength Dependence of Pumping a Superconductor

ORAL

Abstract

Experiment [E. Casandruc et al] has shown transient enhanced superconductivity in LBCO when pumped by ultrafast pulses.This provides a new way to control the propertities of high Tc supercondoctors and explore non-equilibrium phenomenon. Here we explore the effects of pumping the cuprates at different wavelengths. The model is a multi-band Hubbard model (including apical oxygen sites), which we pump with an ultrafast gaussian-pulse to study its time evolution using exact diagonalization (ED). The results show that holes are pumped from the CuO2 plane into the apical oxygens at characteristic optical wavelengths.

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Presenters

  • Ta Tang

    Applied Physics, Stanford

Authors

  • Ta Tang

    Applied Physics, Stanford

  • Thomas Devereaux

    Stanford University, Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, SLAC National Accelerator Laboratory, Physics, Stanford University, SLAC and Stanford University, Institute for Materials and Energy Science, Stanford, SIMES, SLAC National Accelerator Lab, SLAC National Accelerator Laboratory and Stanford University, Stanford Institute for Materials and Energy Sciences, SLAC, Stanford, SIMES, SLAC, and Stanford University, Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University

  • Brian Moritz

    Stanford University, Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, SLAC National Accelerator Laboratory, SLAC and Stanford University, Institute for Materials and Energy Science, Stanford, SSRL Materials Science Division, SLAC National Accelerator Laboratory and Stanford University