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Intrinsic Josephson tunneling in high-temperature superconductors

Avgust Yurgens (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; Dag Winkler (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik)
Nanoscience and Engineering in Superconductivity, eds. V. Moshchalkov, R. Woerdenweber, W. Lang. (Springer, Heidelberg 2010) p. 137-162. (2010)
[Kapitel]

Intrinsic Josephson tunneling takes place between copper-oxide (CuO) planes of several anisotropic high-temperature superconductors, like Bi2Sr2CaCu2O8+x (Bi2212). To study the intrinsic tunneling effects, mesas are usually patterned into the surfaces of Bi2212single crystals. The mesa structure contains an array of typically 5-30 intrinsic Josephson junctions formed between adjacent superconducting CuO planes. The number of defects that could affect measurements is limited in the small volume of the mesa. Variations in the carrier concentration and introduction of columnar defects by heavy-ion irradiation can be used to control the correlations and pinning of magnetic vortex pancakes. The intrinsic tunnelingprovides information on the magnetic phase diagram of Abrikosov vortices, allows for direct measurements of the superconducting critical current of the individual CuO planes, permits for the observation of macroscopic quantum tunneling, allows for tunneling spectroscopy of phonons, the superconducting- and pseudo gaps, and shows coherent THz radiation of significant power.

Nyckelord: intrinsic Josepshon junctions, Bi2212, critical current, THz radiation


Serie: NanoScience and Technology; 2010, DOI: 10.1007/978-3-642-15137-8



Denna post skapades 2010-11-16. Senast ändrad 2014-11-10.
CPL Pubid: 129169

 

Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik

Ämnesområden

Supraledning

Chalmers infrastruktur