Anomaly in the Complex Conductivity of Overdoped Y1−xCaxBa2Cu3O7−δ Thin Films from THz Spectroscopy
作者： N. Bachar , E. Zhukova , B. Gorshunov , E. Farber , M. Roth
DOI: 10.1007/S10948-010-1114-0
关键词:
摘要: We measured the complex conductivity of Ca-doped YBCO thin films in THz frequency range. The were using both Time domain and Frequency methods for spectroscopy. show that a subgap exists overdoped samples 5% 10% Ca doping. appears as sharp decrease real part at frequencies equivalent to gap energy 1 meV is more prominent with increased suggest this related \(d_{x^{2}-y^{2}}\)-wave pairing symmetry an imaginary or id xy . shows well-known 1/ω behavior, but its ωσ 2 product dip spectrum about ∼1 meV.
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sci-hub.se 参考文章(33)
S. E. Barrett, J. A. Martindale, D. J. Durand, C. H. Pennington, C. P. Slichter, T. A. Friedmann, J. P. Rice, D. M. Ginsberg, Anomalous behavior of nuclear spin-lattice relaxation rates in YBa2Cu3O7 below Tc. Physical Review Letters. ,vol. 66, pp. 108- 111 ,(1991) , 10.1103/PHYSREVLETT.66.108
Anand Bhattacharya, Allen M. Goldman, Igor Zutic, Oriol T. Valls, Ulrich Welp, Boyd Veal, INVESTIGATION OF THE SYMMETRY OF THE PAIRING STATE IN YBA2CU3O7-DELTA USING THE NONLINEAR TRANSVERSE MAGNETIC MOMENT : EXPERIMENTAL RESULTS Journal of Superconductivity. ,vol. 12, pp. 99- 103 ,(1999) , 10.1023/A:1007738123479
Second-generation HTS conductors Kluwer Academic Publishers. ,(2005) , 10.1007/B106635
R. Krupke, M. Azoulay, G. Deutscher, Sputtering of Y1Ba2Cu3O7−δ Second-Generation HTS Conductors. pp. 97- 108 ,(2005) , 10.1007/0-387-25839-6_7
C. C. Tsuei, J. R. Kirtley, G. Hammerl, J. Mannhart, H. Raffy, Z. Z. Li, Robust d x 2 − y 2 Pairing Symmetry in Hole-Doped Cuprate Superconductors Physical Review Letters. ,vol. 93, pp. 187004- ,(2004) , 10.1103/PHYSREVLETT.93.187004
J. R. Kirtley, C. C. Tsuei, Ariando, C. J. M. Verwijs, S. Harkema, H. Hilgenkamp, Angle-resolved phase-sensitive determination of the in-plane gap symmetry in YBa2Cu3O7−δ Nature Physics. ,vol. 2, pp. 190- 194 ,(2006) , 10.1038/NPHYS215
C. C. Tsuei, J. R. Kirtley, Pairing symmetry in cuprate superconductors Reviews of Modern Physics. ,vol. 72, pp. 969- 1016 ,(2000) , 10.1103/REVMODPHYS.72.969
A. Frenkel, F. Gao, Y. Liu, J. F. Whitaker, C. Uher, S. Y. Hou, J. M. Phillips, Conductivity peak, relaxation dynamics, and superconducting gap of YBa2Cu3O7 studied by terahertz and femtosecond optical spectroscopies Physical Review B. ,vol. 54, pp. 1355- 1365 ,(1996) , 10.1103/PHYSREVB.54.1355
I. Schürrer, E. Schachinger, J.P. Carbotte, Optical conductivity of superconductors with mixed symmetry order parameters Physica C-superconductivity and Its Applications. ,vol. 303, pp. 287- 310 ,(1998) , 10.1016/S0921-4534(98)00256-1