Advances in ${\hbox{YBa}}_{2}{\hbox{Cu}}_{3}{\hbox{O}}_{7-\delta}$ Grain Boundary Biepitaxial Josephson Junctions: Transport Properties and Mesoscopic Effects
Advances in ${\hbox{YBa}}_{2}{\hbox{Cu}}_{3}{\hbox{O}}_{7-\delta}$ Grain Boundary Biepitaxial Josephson Junctions: Transport Properties and Mesoscopic Effects
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DOI：
10.1109/tasc.2007.898708
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发表时间：
2007-06
影响因子：
1.8
通讯作者：
D. Stornaiuolo;D. Born;D. Dalena;E. Gambale;G. Rotoli;T. Bauch;A. Tagliacozzo;A. Barone;F. Lombardi;F. Tafuri
中科院分区：
文献类型：
--
作者：
D. Stornaiuolo;D. Born;D. Dalena;E. Gambale;G. Rotoli;T. Bauch;A. Tagliacozzo;A. Barone;F. Lombardi;F. Tafuri
本文报道了基于YBa2Cu3O7-delta （YBCO）的晶界（GB）双外延Josephson结输运性质研究的最新进展。考虑到微波应用，我们已经成功地将最初为（110）取向SrTiO3衬底开发的制造工艺扩展到（110）取向LaAlO3衬底。我们还将报告对电导波动的观察，我们认为这与准粒子在GB上的相干扩散有关。这些结果，加上最近在这些结中观察到的宏观量子隧穿和能级量子化，可能有助于揭示跨晶界输运的机制，并修正准粒子在d波输运中的作用和影响。
We report on the latest developments in the study of transport properties of YBa2Cu3O7-delta (YBCO)-based grain boundary (GB) biepitaxial Josephson junctions. We have successfully extended the fabrication process, originally developed for (110) oriented SrTiO3 substrates, to (110) oriented LaAlO3 substrates in view of microwave applications. We will report, also, on the observation of conductance fluctuations, we believe related to the coherent diffusion of quasi-particles across the GB. These results, together with the recent observation of macroscopic quantum tunneling and energy level quantization in these junctions, could help cast some light on the mechanism involved in transport across grain boundaries and in revising the role and the effect of quasi particles in d-wave transport.