Quantum Critical Point Shifts under Superconductivity: the Pnictides and the Cuprates

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Quantum Critical Point Shifts under Superconductivity: the Pnictides and the Cuprates

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dc.contributor.author Moon, Eun
dc.contributor.author Sachdev, Subir
dc.date.accessioned 2012-01-12T16:15:19Z
dc.date.issued 2010
dc.identifier.citation Moon, Eun, and Subir Sachdev. 2010. Quantum critical point shifts under superconductivity: the pnictides and the cuprates. Physical Review B 82(10): 104516. en_US
dc.identifier.issn 1550-235X en_US
dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:7615608
dc.description.abstract We compare the position of an ordering transition in a metal to that in a superconductor. For the spin-density wave (SDW) transition, we find that the quantum critical point shifts by order \(\mid\Delta\mid\), where \(\Delta\) is pairing amplitude so that the region of SDW order is smaller in the superconductor than in the metal. This shift is larger than the \(\sim\mid\Delta\mid\) shift predicted by theories of competing orders which ignore Fermi-surface effects. For Ising-nematic order, the shift from Fermi-surface effects remains of order \(\mid\Delta\mid 2\). We discuss implications of these results for the phase diagrams of the cuprates and the pnictides. We conclude that recent observations imply that the Ising-nematic order is tied to the square of the SDW order in the pnictides but not in the cuprates. en_US
dc.description.sponsorship Physics en_US
dc.language.iso en_US en_US
dc.publisher American Physical Society en_US
dc.relation.isversionof doi://10.1103/PhysRevB.82.104516 en_US
dc.relation.hasversion http://arxiv.org/abs/1005.3312v4 en_US
dash.license OAP
dc.subject superconductivity en_US
dc.subject strongly correlated electrons en_US
dc.title Quantum Critical Point Shifts under Superconductivity: the Pnictides and the Cuprates en_US
dc.type Journal Article en_US
dc.description.version Author's Original en_US
dc.relation.journal Physical Review B en_US
dash.depositing.author Sachdev, Subir
dc.date.available 2012-01-12T16:15:19Z

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  • FAS Scholarly Articles [7078]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University

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