Lecture Andres Cano
|13 September 2012||FWN-Building 5114.0004, Nijenborgh 4, 9747 AG, Groningen|
|Speaker:||Dr. Andres Cano|
|Affiliation:||European Synchrotron Radiation Facility (ESRF), Grenoble, France|
|Title:||Magnetoelastic coupling in iron-based superconductors|
|Date:||Thu Sep 13, 2012|
|Telephone:||+31 50 363 3419|
The surprising discovery of superconductivity in fluorine-doped arsenic-oxide LaO1-xFxFeAs  has established a new class of high-temperature superconductors . The normal state of these systems displays an intriguing interplay between structural and magnetic transitions that persists in the superconducting region of the phase diagram. In this talk I will discuss how this interplay is largely dominated by symmetry-specific magnetoelastic couplings . I will show, in particular, how these couplings are behind some recent experimental findings such as i) the existence of tricritical points in the generic phase diagram of these systems  and ii) the variations of transition temperatures induced by uniaxial pressure .
 Y. Kamihara et al., J. Am. Chem. Soc. 130, 3296 (2008).
 For reviews, see e.g. D.C. Johnston, Advances in Physics 59, 803 (2010) ; P. J. Hirschfeld et al., Rep. Prog. Phys. 74, 124508 (2011).
 A. Cano, M. Civelli, I. Eremin, and I. Paul, Phys. Rev. B, 82, 020408(R) (2010); I. Paul, A. Cano and K. Sengupta, ibid. 83, 115109 (2011); A. Cano and I. Paul, ibid. 85, 155133 (2012).
 Kim et al. Phys. Rev. B 83, 134522 (2011).
 Dhital et al., Phys. Rev. Lett. 108, 087001 (2012)
|Last modified:||22 October 2012 2.31 p.m.|