Charge and vortex Kosterlitz–Thouless transitions in Bi-superconducting mixed crystal thin films
Physica C: Superconductivity, ISSN: 0921-4534, Vol: 317, Page: 661-665
1999
- 2Citations
- 5Captures
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Article Description
Temperature ( T ) dependence of the sheet resistance ( R □ ) has been investigated on the c -axis oriented thin films of the (Bi2212/Bi2201) mixed crystal with different molar fractions. The R □ – T superconducting characteristic deteriorated with reduction of the Bi2212 fraction, and almost disappears at 48 mol% where a superconductor-to-insulator transition took place, with the resistance in the normal state, R N, reaching 4.1 kΩ at 80 K. This R N value is close to the universal quantum number, h /(2 e ) 2 ≅6.5 kΩ predicted by the Kosterlitz–Thouless (KT) transition theory. The R □ – T characteristics of the 48 mol% thin film can be elucidated as a competitive process of KT transition brought about by charge or vortex in the two-dimensional layer structure.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0921453499001689; http://dx.doi.org/10.1016/s0921-4534(99)00168-9; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0033131004&origin=inward; http://linkinghub.elsevier.com/retrieve/pii/S0921453499001689; http://api.elsevier.com/content/article/PII:S0921453499001689?httpAccept=text/xml; http://api.elsevier.com/content/article/PII:S0921453499001689?httpAccept=text/plain; https://linkinghub.elsevier.com/retrieve/pii/S0921453499001689; http://dx.doi.org/10.1016/s0921-4534%2899%2900168-9; https://dx.doi.org/10.1016/s0921-4534%2899%2900168-9
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