Dr. Mahmoud Abdel-Hafiez [HPSTAR, China]

Title: Unconventional superconductivity in strongly correlated materials

Time: 2:00 - 3:00 PM, Friday, January 15, 2016

Place: Conference Room 201, HPSTAR (Shanghai)

Host: Dr. Xiaojia Chen

Abstract:

One of the major themes in the physics of condensed matter is unconventional superconductivity in correlated electronic systems. Superconductivity remains mostly unsolved and emerges when the spin-density wave / charge density wave order is suppressed by doping, intercalation, or by external pressure Although great efforts have been made in all known quasi-two dimensional superconductors, including transition metal dichalcogenides (TMD) to high-Tc cuprates and iron based superconductors, the origin and exact boundary of the electronic orderings and superconductivity are still interesting but controversial problems and therefore require further study. Our research is focused on the unconventional superconductivity in several strongly correlated materials. We investigated the doping evolution of the superconducting gap and provide an understanding to the pairing mechanism of Fe based superconductors. We investigated various fundamental problems for instance, the coexistence and competition between different phases; pairing symmetry and mechanism by transport, upper critical field, and thermodynamic measurements. Our results shed light to the understanding of the nature of unconventional superconductivity in quasi-two dimensional superconductors. Additionally, our findings will support to understand the link of CDW in high-Tc cuprates and other systems.

Biography of the Speaker:

Dr. Mahmoud Abdel-Hafiez was awarded PhD degree in physics from Institute of solid state physics, Dresden University, Germany in 2012. He worked as Postdoc researcher at the IFW Institute in Dresden from 2012 to 2013. Then he joined the group of Prof. Moshchalkov and Prof. Silhanek at the Universities of Leuven and Liege in Belgium from 03/2013 to 03/2014. From March 2014 he works as Postdoc researcher at the HPSTAR in Shanghai. His research is focused on the study of unconventional superconductivity in strongly correlated material. Mahmoud has published over 39 high-profile peer-reviewed papers including Nature Materials, Physical Review B, Inorganic Chemistry, etc.