Melting the Superconducting State in the Electron Doped Cuprate Pr$_{1.85}% $Ce$_{0.15}$CuO$_{4-\delta}$ with Intense near-infrared and Terahertz Pulses

M. Beck; M. Klammer; I. Rousseau; M. Obergfell; P. Leiderer; M. Helm; V. V. Kabanov; I. Diamant; A. Rabinowicz; Y. Dagan; J. Demsar

doi:10.1103/physrevb.95.085106

arXiv · 1603.04155

Melting the Superconducting State in the Electron Doped Cuprate Pr$_{1.85}% $Ce$_{0.15}$CuO$_{4-\delta}$ with Intense near-infrared and Terahertz Pulses

M. Beck·M. Klammer·I. Rousseau·M. Obergfell·P. Leiderer·M. Helm·V. V. Kabanov·I. Diamant·A. Rabinowicz·Y. Dagan·J. Demsar

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Abstract

We studied the superconducting (SC) state depletion process in an electron doped cuprate Pr$_{1.85}$Ce$_{0.15}$CuO$_{4-\delta}$ by pumping with near-infrared (NIR) and narrow-band THz pulses. When pumping with THz pulses tuned just above the SC gap, we find the absorbed energy density required to deplete superconductivity, $A_{dep}$, matches the thermodynamic condensation energy. Contrary, by NIR pumping $A_{dep}$ is an order of magnitude higher, despite the fact that the SC gap is much smaller than the energy of relevant bosonic excitations. The result implies that only a small subset of bosons contribute to pairing.

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M. Beck, M. Klammer, I. Rousseau, M. Obergfell, P. Leiderer, M. Helm, V. V. Kabanov, I. Diamant, A. Rabinowicz, Y. Dagan, J. Demsar. 2016-03-14. Melting the Superconducting State in the Electron Doped Cuprate Pr$_{1.85}% $Ce$_{0.15}$CuO$_{4-\delta}$ with Intense near-infrared and Terahertz Pulses. https://doi.org/10.1103/physrevb.95.085106

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