Electron-tunneling measurements of low-T-c single-layer Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between superconducting and pseudogap states
2012 (English)In: Physical Review B, ISSN 2469-9950, Vol. 86, no 21, 214506Article in journal (Refereed) Published
We experimentally study intrinsic tunneling and high magnetic field (up to 65 T) transport characteristics of the single-layer cuprate Bi2+xSr2-yCuO6+delta, with a very low superconducting critical temperature T-c less than or similar to 4 K. It is observed that the superconducting gap, the collective bosonic mode energy, the upper critical field, and the fluctuation temperature range are scaling down with T-c, while the corresponding pseudogap characteristics remain the same as in high-T-c cuprates with 20 to 30 times higher T-c. The observed disparity of the superconducting and pseudogap scales clearly reveals their different origins.
Place, publisher, year, edition, pages
2012. Vol. 86, no 21, 214506
Research subject Physics
IdentifiersURN: urn:nbn:se:su:diva-86498DOI: 10.1103/PhysRevB.86.214506ISI: 000312290600002OAI: oai:DiVA.org:su-86498DiVA: diva2:587156