Studies of the zero-bias conductance peak (ZBCP) in thin-film superconducting YBa2Cu3O7 planar tunnel junctions:: Detection and modeling of ZBCP splittings

被引：0

作者：

Greene, L. H. ^{[1
]}

Hentges, P. J. ^{[1
]}

Park, W. K. ^{[1
]}

Westwood, G. ^{[2
]}

Pafford, M. M. ^{[2
]}

Klemperer, W. G. ^{[2
]}

机构：

[1] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[2] Dept Chem, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA

来源：

LOW TEMPERATURE PHYSICS, PTS A AND B | 2006年 / 850卷

关键词：

high-temperature superconductivity; unconventional superconductivity; Andreev bound states; planar tunneling spectroscopy; zero-bias conductance peak; Doppler effect in quasiparticles; broken time-reversal symmetry;

D O I：

暂无

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Planar tunneling spectroscopy is performed on superconducting YBa2Cu3O7 (YBCO) thin films which we grow in four different crystallographic orientations by off-axis sputter deposition. The tunneling insulator is formed via a patented solution-based zirconia deposition process, and measurements on these junctions can show remarkably sharp spectral features. A systematic study of the dependence of the tunneling conductance on applied magnetic fields, temperature and different counter-electrode deposition techniques, and comparison of these results with other published data, reveal some universal behaviors for when spontaneous and magnetic-field induced splittings of the ZBCP occur, or not. Our modeling, in which the values of the tunneling cone, surface faceting and quasiparticle lifetime are varied, accounts for the observed behaviors.

引用

页码：467 / +

页数：2

共 46 条

[1] Density of states in d-wave superconductors disordered by extended impurities -: art. no. 140512 [J].