Macroscopic evidence for quantum criticality and field-induced quantum fluctuations in cuprate superconductors

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We present macroscopic experimental evidence for field-induced microscopic quantum fluctuations in different hole- and electron-type cuprate superconductors with varying doping levels and numbers of CuO$_2$ layers per unit cell. The significant suppression of the zero-temperature in-plane magnetic irreversibility field relative to the paramagnetic field in all cuprate superconductors suggests strong quantum fluctuations due to the proximity of the cuprates to quantum criticality.
3 figures. To appear in Phys. Rev. B, Rapid Communications (2007). For correspondence, contact: Nai-Chang Yeh (e-mail: ncyeh@caltech.edu)

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Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/140808

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0612380
 http://arxiv.org/abs/cond-mat/0612380
 Phys. Rev. B 76, 140506(R) (2007)
 doi:10.1103/PhysRevB.76.140506

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arXiv