Transition from strong to weak coupling regime with lowering Tc in Tl2Ba2CuO6+x

✍ Scribed by O.M. Vyaselev; N.N. Kolesnikov; I.F. Schegolev

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 106 KB
• Volume: 235-240
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)92032-x

✦ Synopsis

Using 2°STl NMR, the changes in electronic properties in the normal and superconducting state of the T12Ba2CuO6+ x compound associated with variation of T o are studicd in samples with T~=30, 100, and l15K.

Decreasing T with oxygen doping is shown to be associated with the growth of the static electron spin susceptibility and with lowering the A/T~ ratio (A is superconducting gap). This effect indicates to the conesponding weakening of coupling regime.

I. INTRODUCTION.