Restoring interlayer Josephson coupling in La1.885Ba0.115CuO4 by charge transfer melting of stripe order
Restoring interlayer Josephson coupling in La1.885Ba0.115CuO4 by charge transfer melting of stripe order
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DOI：
10.1103/physrevb.93.224522
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发表时间：
2016-06-30
影响因子：
3.7
通讯作者：
Dhesi, S. S.
中科院分区：
文献类型：
--
作者：
Khanna, V.;Mankowsky, R.;Dhesi, S. S.
We show that disruption of charge-density-wave (stripe) order by charge transfer excitation, enhances the superconducting phase rigidity in La1.885Ba0.115CuO4. Time-resolved resonant soft x-ray diffraction demonstrates that charge order melting is prompt following near-infrared photoexcitation whereas the crystal structure remains intact for moderate fluences. THz time-domain spectroscopy reveals that, for the first 2 ps following photoexcitation, a new Josephson plasma resonance edge, at higher frequency with respect to the equilibrium edge, is induced indicating enhanced superconducting interlayer coupling. The fluence dependence of the charge-order melting and the enhanced superconducting interlayer coupling are correlated with a saturation limit of similar to 0.5 mJ/cm(2). Using a combination of x-ray and optical spectroscopies we establish a hierarchy of timescales between enhanced superconductivity, melting of charge order, and rearrangement of the crystal structure.
