Kinetics of stripes and pseudogap in high-temperature superconductors

V. M. Petnikova; Vladimir V. Shuvalov; Andrei V. Voronov

doi:10.1117/12.469100

29 May 2002 Kinetics of stripes and pseudogap in high-temperature superconductors

V. M. Petnikova, Vladimir V. Shuvalov, Andrei V. Voronov

Proceedings Volume 4752, ICONO 2001: Ultrafast Phenomena and Strong Laser Fields; (2002) https://doi.org/10.1117/12.469100
Event: XVII International Conference on Coherent and Nonlinear Optics (ICONO 2001), 2001, Minsk, Belarus

Abstract

To interpret the data of transient nonlinear spectroscopy of cooper-oxide high-temperature superconductors, a phenomenological model, describing magneto-dipole self- organization of holes in CuO₂ planes and kinetics of the corresponding phase transition, has been developed. It has been shown that, for the exchange energy approximately 100 meV and the doping level <n> approximately 0.1 hole/cell, the temperature T decreases below the critical point T* approximately 150 K leads to formation of a spatially non-uniform distribution of holes (the stripe- structure) and to appearance of corresponding energy gap in the electronic structure. Calculated steady-state dependencies of T* on <n> and of the gap width on T agree with the known experimental data. The predicted phase transition kinetics depends on the initial temperature T. When T* < T < T_m approximately equals (1.4 divided by 1.5) T*, the stripe-structure decay is rather slow (approximately 10^-9s and more) two-stage process. During the first stage, a large-scale fluctuation of an average dipole moment is formed and after that the spatial region, entrained in the fluctuation, broadens as the phase switching wave.

Citation Download Citation

V. M. Petnikova, Vladimir V. Shuvalov, and Andrei V. Voronov "Kinetics of stripes and pseudogap in high-temperature superconductors", Proc. SPIE 4752, ICONO 2001: Ultrafast Phenomena and Strong Laser Fields, (29 May 2002); https://doi.org/10.1117/12.469100

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