Bulletin of the American Physical Society
APS March Meeting 2010
Volume 55, Number 2
Monday–Friday, March 15–19, 2010; Portland, Oregon
Session B42: Charge, Spin, and Superconductivity
11:15 AM–1:51 PM,
Monday, March 15, 2010
Sponsoring Unit: DCMP
Chair: Andrei Bernevig, Princeton University
Abstract ID: BAPS.2010.MAR.B42.9
Abstract: B42.00009 : Charge $4e$ superconductivity from pair density wave order in high temperature superconductors*
12:51 PM–1:03 PM
Preview Abstract Abstract
(Dept of Physics, University of Illinois)
(Dept. of Physics, Harvard University)
(Dept. of Physics, Stanford University)
Several spectacular experimental anomalies have recently been discovered in certain cuprates, notably LBCO and LNSCO, which exhibit unidirectional spin and charge order (known as ``stripe order''). These observations are evidence for a novel ``striped superconducting'' state, in which the superconducting order parameter is modulated in space, such that its average is precisely zero. We show that thermal melting of the striped superconducting state can lead to a number of unusual phases, of which the most novel is a charge $4e$ superconducting state, with a corresponding fractional flux quantum $hc/4e$. These are never-before observed states of matter, that cannot arise from the conventional BCS mechanism. Direct confirmation of their existence, even in a subset of the cuprates, could have much broader implications for our understanding of high temperature superconductivity. We propose experiments to observe fractional flux quantization, which thereby could confirm the existence of these states.  E. Berg, E. Fradkin and S. A. Kivelson, Nature Physics 5, 830 (2009).
*Work supported in part by NSF DMR0758462, DMR0531196, DOE DE-FG02-91ER5439 and DE-FG02-06ER46287.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.MAR.B42.9
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
1 Physics Ellipse, College Park, MD 20740-3844
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700