Session B33: Superconductivity: Mostly Cuprates
11:15 AM–2:15 PM, Monday, March 16, 2009
Room: 403
Sponsoring Unit:
DCMP
Chair: Timir Datta, University of South Carolina
Abstract ID: BAPS.2009.MAR.B33.1
Abstract: B33.00001 : Making superconducting transition temperature higher in Bi$_{2}$Sr$_{2}$Ca$_{2}$Cu$_{3}$O$_{10+\delta }$
11:15 AM–11:27 AM
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Authors:
Xiao-Jia Chen
(Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015)
Viktor V. Struzhkin
(Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015)
Russell J. Hemley
(Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015)
Ho-kwang Mao
(Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015)
Yong Yu
(Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China)
Cheng-Tian Lin
(Max-Planck-Institut f\"ur Festk\"orperforschung, D-70569 Stuttgart, Germany)
We report an experimental finding of \textit{Tc} enhancement in optimally doped Bi$_{2}$Sr$_{2}$Ca$_{2}$Cu$_{3}$O$_{10+\delta }$. We found that the generally observed pressure effect on \textit{Tc}, $i.e.$, \textit{Tc} first increases with pressure and then decreases after passing a maximum at an optimal pressure, is only held below a critical pressure around 24 GPa in this multilayer material. After that \textit{Tc} enhances remarkably upon further compression, considerably surpassing the first maximum. The critical pressure was then considered as the crossover from antiferromagnetism to superconductivity in the inner CuO$_{2}$ plane. The afterwards \textit{Tc} enhancement was suggested through the optimization of two competing energy scales (pairing and phase ordering) of different CuO$_{2}$ planes. The results have important implications for engineering superconductors with much higher \textit{Tc}'s at ambient conditions.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2009.MAR.B33.1