M.L. Schneider

Publications (5)4.12 Total impact

• Source

  Available from: Roman Sobolewski

  Article: Ultrafast carrier relaxation dynamics in single-layer cuprates

  M. L. Schneider, J. Demsar, Y. Glinka, A. Klimov, A. Krapf, S. Rast, Y. H. Ren, Weidong Si, Y. Xu, X. H. Zeng, I. Bozovic, G. Lüpke, R. Manzke, R. Sobolewski, A. T. Taylor, N. H. Tolk, X. X. Xi, R. Joynt, M. Onellion
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  ABSTRACT: Using a femtosecond pump-probe optical technique, we measured the time-resolv ed change in reflectivity of three single-layer cuprate samples, including Bi2Sr 2 − x La x CuO 6 + z, La2CuO 4 + y and La 2 − x Sr x CuO4 grown on SrTiO3. We analyze the data in terms of a nonthermal electron relaxation model, and obtain quantitative agreement between the model and the data. The initial electron-electron thermalization process is much longer in the superconducting samples as opposed to the overdoped nonsuperconducting sample, suggesting a bottleneck in electron thermalization process due to the presence of the superconducting gap.
  EPL (Europhysics Letters) 01/2007; 60(3):460. · 2.17 Impact Factor
• Article: Femtosecond Pump-probe studies of Carrier Dynamics in the Normal State of the Unconventional Superconductor Sr2RuO4

  P. Guptasarma, S. L. Sendelbach, M. L. Schneider, M. S. Williamsen, G. Taft, A. Souslov, M. Onellion
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  ABSTRACT: The microscopic origin of unconventional superconductivity1 is one of the most fascinating questions2–3 in condensed matter physics. In recent years, important questions have been raised about the nature of the normal (metallic, non-superconducting) state above the superconducting critical transition temperature (Tc). In fact, it is now generally agreed4,5 that a better understanding of the nature of the normal state is crucial to our understanding of the microscopic origin of the superconducting state.
  MRS Proceedings. 12/2003; 850.
• Article: Carrier relaxation time divergence in single and double layer cuprates.

  M. L. Schneider, S. Rast, M. Onellion, J. Demsar, A. J. Taylor, Y. Glinka, N. H. Tolk, Y. H. Ren, G. Lüpke, A. Klimov, [......], M. Abrecht, D. Ariosa, D. Pavuna, A. Krapf, R. Manzke, J. O. Printz, M. S. Williamsen, K. E. Downum, P. Guptasarma, I. Bozovic
  The European Physical Journal E 01/2003; 36:327-34. · 1.94 Impact Factor
• Article: Evidence for two coupled subsystems in the superconducting state of La_ {2-x} Sr_ {x} CuO_ {4}

  S. Rast, M. L. Schneider, M. Onellion, X. H. Zeng, Weidong Si, X. X. Xi, M. Abrecht, D. Ariosa, D. Pavuna, Y. H. Ren, G. Lüpke, I. Perakis
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  ABSTRACT: We used a pump-probe technique to measure the transient change of optical reflectivity of both La2-xSrxCuO4, of various dopings, and slightly underdoped YBa2Cu3O7-x and NdBa2Cu3O7-x thin films. For the La2-xSrxCuO4 films, our data demonstrate the coexistence, in the superconducting state, of two coupled subsystems with different relaxation times and different contributions to the optical reflectivity. One subsystem is associated with the superconducting phase. By contrast, the data from YBa2Cu3O7-x and NdBa2Cu3O7-x shows that the coupling between the two subsystems is weak or absent.
  Phys. Rev. B. 10/2001; 64(21).
• Article: Electron dynamics in metallic and spin-glass cuprates

  M. L. Schneider, M. Onellion, X. X. Xi, Xianghui Zeng, Arsen Soukiassian, P. Omernik, G. Taft
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  ABSTRACT: Using femtosecond pump-probe measurements, we present transient optical reflectivity measurements of metallic, superconducting and spin-glass La2−xSrxCuO4 cuprates. The rise time is temperature-independent and resolution-limited (<50 fs) for metallic sample, and is much faster than spin-glass samples (∼200 fs) at all temperatures. A divergence in the electron-lattice relaxation (τR) time with temperature is observed for the metallic samples, but not for spin-glass samples.
  Phys. Rev. B. 70(1).