Doping dependent time-reversal symmetric nonlinearity of YBa_2Cu_3O_7-d thin films

Details Doping dependent time-reversal symmetric nonlinearity of YBa_2Cu_3O_7-d thin films Doping dependent time-reversal symmetric nonlinearity of YBa_2Cu_3O_7-d thin films

2003-06-16

arxiv.org/abs/cond-mat/0306416v2

Physica C 408-410, 324 (2004)

Physics

Condensed Matter

Superconductivity

2 pages, 3 figures, submitted to Physica C for M2S-Rio conference press

Scientific paper

10.1016/j.physc.2004.02.117

We have measured the temperature dependent third harmonic response from a series of under-doped YBa_2Cu_3O_7-d thin films to address the mechanism of nonlinearity in these samples. We find that the intrinsic Ginzburg-Landau nonlinearity near Tc is doping dependent, with the sample becoming more nonlinear as it is under-doped. The results are consistent with the doping dependence of the condensation energy of YBa_2Cu_3O_7-d.

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