Magnetic quantum oscillations in YBa2Cu3O6.61 and YBa2Cu3O6.69 in fields of up to 85 T: patching the hole in the roof of the superconducting dome.

Journal article

We measure magnetic quantum oscillations in the underdoped cuprates YBa2Cu3O6+x with x=0.61, 0.69, using fields of up to 85 T. The quantum-oscillation frequencies and effective masses obtained suggest that the Fermi energy in the cuprates has a maximum at hole doping p approximately 0.11-0.12. On either side, the effective mass may diverge, possibly due to phase transitions associated with the T=0 limit of the metal-insulator crossover (low-p side), and the postulated topological transition from small to large Fermi surface close to optimal doping (high p side).

Authors: Singleton, J; de la Cruz, C; McDonald, R; Li, S; Altarawneh, M

• Publication status: Published
• Journal: Physical Review Letters
• Volume: 104
• Issue: 8
• Pages: 086403
• Publication date: 2010-02-01
• DOI: 10.1103/physrevlett.104.086403
• EISSN: 1079-7114
• ISSN: 0031-9007
• Language: English