Dr. Ivan A. Troyan [Shubnikov Institute of Crystallography, Russian Academy of Sciences, Moscow]

Title: Observation of superconductivity in H2S by nuclear resonant scattering

Time: 3:00 - 4:00 PM, Thursday, May 12, 2016

Place: Auditorium Room 410, Building 6, HPSTAR (Shanghai)

Host: Dr. Xiaojia Chen

Abstract:

The Meissner effect is used as a proof of the superconducting nature of a material and typically demonstrated by the levitation of a magnet as the material reaches its superconducting state. A new approach was needed to study a superconductor created inside a high-pressure cell. We have used synchrotron Mössbauer spectroscopy to monitor the expulsion of the magnetic field by superconducting hydrogen sulfide at 150 GPa using 119Sn as a sensor.

Biography of the Speaker:

Ivan A. Troyan was awarded combined BSc and MSc degrees in physics from Moscow Institute of Physics and Technology, Russia in 1987. After that, he moved to Institute for High Pressure Physics, Russian Academy of Science as a junior researcher and researcher till 2006. He obtained his Ph.D in Physics and Mathematics in this institute in 2003. He is now a senior scientist at Shubnikov Institute of Crystallography, Russian Academy of Sciences. He had held visiting scholar and research scientist positions in Max-Planck Institut fuer Chemie of Germany and Clarendon laboratory, Oxford University, UK during 1995-2015. His recent works on hydrogen and hydrogen sulfide, published in Nature Materials, Nature, and Science, led to the major breakthrough in high-pressure physics. He was awarded Royal Society Fellowship in 1993-1998 and A.V.Shubnikov prize of Russian Academy of Sciences in 2003.