Bulletin of the American Physical Society
APS March Meeting 2013
Volume 58, Number 1
Monday–Friday, March 18–22, 2013; Baltimore, Maryland
Session R37: Focus Session: Fe-based Superconductors: Nematicity and Related Phenomena
2:30 PM–5:30 PM,
Wednesday, March 20, 2013
Room: 345/346
Sponsoring
Units:
DMP DCOMP
Chair: Andrey Chubukov, University of Wisconsin
Abstract ID: BAPS.2013.MAR.R37.7
Abstract: R37.00007 : Nematic transition and hidden quantum critical point in iron-pnictide superconductors
3:42 PM–4:18 PM
Preview Abstract
Abstract
Author:
Shigeru Kasahara
(Kyoto University)
A central issue in the physics of iron-based superconductivity concerns the origin of the pairing interaction, in which the importance of the spin and orbital degrees of freedoms has been discussed. Clarifying the anomalies inherent to this system and unveiling their connections to the high-temperature superconductivity are of primary importance. Here, we report our investigations on clean single crystals of BaFe$_2$(As$_{1-x}$P$_x$)$_2$ [1]. The observed quantum critical point (QCP) behaviors as represented by non-Fermi liquid transport [1], effective mass enhancement [2], and a sharp peak in the zero-temperature magnetic penetration depth [3] at a critical doping are discussed. In addition, we discuss the development of electronic nematicity, a unidirectional self organized state which breaks the underlying crystal lattice symmetry. Our highly sensitive magnetic anisotropy measurements, together with high resolution synchrotron X-ray diffraction experiments, indicate that electronic nematicity develops in the normal state, far above the magneto-structural and superconducting transitions, resulting in a new phase diagram of iron-based superconductors. The development of electronic nematicity appears to help the emergence of superconductivity whilst the QCP provides the highest superconducting transition temperature.\\[4pt] [1] S. Kasahara et al., Phys. Rev. B {\bf 81}, 184519 (2010).\\[0pt] [2] H. Shishido et al., Phys. Rev. Lett. {\bf 104}, 057008 (2010).\\[0pt] [3] K. Hashimoto et al., Science {\bf 336}, 1554-1557 (2012).\\[0pt] [4] S. Kasahara, et al., Nature {\bf 486}, 382-385 (2012).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2013.MAR.R37.7
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2018 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
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