✦ LIBER ✦
Nuclear magnetic relaxation and d-wave pairing in an extended Hubbard model with diagonal disorder
✍ Scribed by Tomasz Kostyrko
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 445 KB
- Volume
- 178
- Category
- Article
- ISSN
- 0921-4534
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✦ Synopsis
The temperature behaviour of the superconducting gap function and the NMR relaxation rate TI ~ was investigated with a help of the extended Hubbard model with attractive intersite and repulsive intrasite interactions both in the perfect and disordered lattice. The relaxation rate in the perfect lattice was found to exhibit a Hebet-Slichter maximum which was strongly reduced for a non-half-filled band. The influence of disorder on the superconducting properties of the system manifests itself in smoothing out the peak completely even for n= 1 provided that the disorder parameter is strong enough.