Enhanced superconductivity in Sr2CuO4−v

✍ Scribed by T.H. Geballe; M. Marezio

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 224 KB
• Volume: 469
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2009.03.054

✦ Synopsis

A critical review of previous investigations of the superconductivity with enhanced T c $ 95 K found in Sr 2 CuO 4Àv shows that new physics occurs in a highly overdoped region of the cuprate phase diagram. Moreover, evidence is adduced from the literature that 30% of the oxygen sites in the CuO 2 layers are vacant; a conclusion which is at odds with the universally made assumption that superconductivity originates in stoichiometric CuO 2 layers. While further research is needed in order to identify the pairing mechanism(s) responsible for the enhanced T c , we suggest possible candidates.