Theoretical calculations for disordered d-wave superconductors

✍ Scribed by E.S. Caixeiro; E.V.L. de Mello; A. Troper

• Book ID: 104083046
• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 139 KB
• Volume: 460-462
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2007.03.248

✦ Synopsis

We calculate the distributions P[D 0 (r i )] of local d-wave pairing amplitudes D 0 (r i ) and P[q(r i )] of local density of charge carriers q(r i ) for the La 2Àx Sr x CuO 4 high-temperature superconductor (HTSC) family in a disordered two-dimensional medium. To reproduce the observed inhomogeneity a random potential V imp , within a Bogoliubov-de Gennes (BdG) formalism, is considered. The calculations show that the underdoped compounds are more inhomogeneous than the overdoped ones. Also, the spatial variation of D 0 (r i ) decreases as the average density of charge carriers hqi increases, demonstrating that the system becomes more homogeneous for high values of hqi.