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High-Tc superconductivity in bismuthates—How many roads lead to high Tc?

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4 Author(s)
Batlogg, B. ; AT&T Bell Laboratories, 800 Mountain Avenue, Murray Hill, New Jersey 07974, USA ; Cava, R.J. ; Schneemeyer, L.F. ; Espinosa, G.P.

The superconducting transition temperature in BaBiO3-based superconductors exceeds 30 K. Magnetic measurements are analyzed to give their density of states at EF, N*(0) ∝ γ. The uniqueness of Bi-O and Cu-O superconductors is revealed in an updated Tc-γ plot. The two classes of compounds share basic electronic properties, particularly a partially unoccupied band with significant O 2p character, which might favor a common pairing mechanism.

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

Published in:

IBM Journal of Research and Development  (Volume:33 ,  Issue: 3 )