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Journal Article

Photoinduced melting of superconductivity in the high-Tc superconductor La2-xSrxCuO4 probed by time-resolved optical and terahertz techniques

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Logvenov,  G.
Scientific Facility Thin Film Technology (Gennady Logvenov), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Beyer, M., Städter, D., Beck, M., Schäfer, H., Kabanov, V. V., Logvenov, G., et al. (2011). Photoinduced melting of superconductivity in the high-Tc superconductor La2-xSrxCuO4 probed by time-resolved optical and terahertz techniques. Physical Review B, 83(21): 214515.


Cite as: https://hdl.handle.net/21.11116/0000-000E-BE29-F
Abstract
The dynamics of depletion and recovery of a superconducting state in La(2-x)Sr(x)CuO(4) thin films is investigated utilizing optical pump-probe and optical pump-THz-probe techniques as a function of temperature and excitation fluence. The absorbed energy density required to suppress superconductivity is found to be about eight times higher than the thermodynamically determined condensation energy density and nearly temperature independent between 4 and 25 K. These findings indicate that, during the time when the superconducting state suppression takes place (approximate to 0.7 ps), a large part (nearly 90%) of the energy is transferred to the phonons with energy lower than twice the maximum value of the superconducting gap and only 10% is spent on Cooper pair breaking.