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Sebastian SE, Harrison N, Altarawneh MM, et al. Metal-insulator quantum critical point beneath the high Tc superconducting dome. Proc Natl Acad Sci U S A. 2010;107(14):6175-9doi: 10.1073/pnas.0913711107.
Sebastian, S. E., Harrison, N., Altarawneh, M. M., Mielke, C. H., Liang, R., Bonn, D. A., Hardy, W. N., & Lonzarich, G. G. (2010). Metal-insulator quantum critical point beneath the high Tc superconducting dome. Proceedings of the National Academy of Sciences of the United States of America, 107(14), 6175-9. https://doi.org/10.1073/pnas.0913711107
Sebastian, Suchitra E, et al. "Metal-insulator quantum critical point beneath the high Tc superconducting dome." Proceedings of the National Academy of Sciences of the United States of America vol. 107,14 (2010): 6175-9. doi: https://doi.org/10.1073/pnas.0913711107
Sebastian SE, Harrison N, Altarawneh MM, Mielke CH, Liang R, Bonn DA, Hardy WN, Lonzarich GG. Metal-insulator quantum critical point beneath the high Tc superconducting dome. Proc Natl Acad Sci U S A. 2010 Apr 06;107(14):6175-9. doi: 10.1073/pnas.0913711107. Epub 2010 Mar 19. PMID: 20304800; PMCID: PMC2851994.
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Proc Natl Acad Sci U S A. 2010 Apr 06;107(14):6175-9. doi: 10.1073/pnas.0913711107. Epub 2010 Mar 19.

Metal-insulator quantum critical point beneath the high Tc superconducting dome.

Proceedings of the National Academy of Sciences of the United States of America

Suchitra E Sebastian, N Harrison, M M Altarawneh, C H Mielke, Ruixing Liang, D A Bonn, W N Hardy, G G Lonzarich

Affiliations

  1. Cavendish Laboratory, JJ Thomson Avenue, University of Cambridge, Cambridge CB3 OHE, UK. [email protected]

PMID: 20304800 PMCID: PMC2851994 DOI: 10.1073/pnas.0913711107

Abstract

An enduring question in correlated systems concerns whether superconductivity is favored at a quantum critical point (QCP) characterized by a divergent quasiparticle effective mass. Despite such a scenario being widely postulated in high T(c) cuprates and invoked to explain non-Fermi liquid transport signatures, experimental evidence is lacking for a critical divergence under the superconducting dome. We use ultrastrong magnetic fields to measure quantum oscillations in underdoped YBa(2)Cu(3)O(6+x), revealing a dramatic doping-dependent upturn in quasiparticle effective mass at a critical metal-insulator transition beneath the superconducting dome. Given the location of this QCP under a plateau in T(c) in addition to a postulated QCP at optimal doping, we discuss the intriguing possibility of two intersecting superconducting subdomes, each centered at a critical Fermi surface instability.

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