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XPS studies on the superconductor-insulator transition in Bi2−xPbxSr2Ca1−yYyCu2O8+δ system

✍ Scribed by B.R. Sekhar; N.L. Saini; P. Srivastava; K.B. Garg


Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
826 KB
Volume
55
Category
Article
ISSN
0022-3697

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We identify a disorder induced mobility edge E c in the system Bi-2212+Y/Ca. The ~uhstitution shifts the Fermi energy below E c and causes a superconductor-insulator transition. In the insulating state charge transport happens by Variable-Range-Hopping (Shklovski-Efros case). The transition can eith