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Vortices in superconductors: All the physics in a single grip

Date: 2017-11-27
Time: 14:00
Venue: M236会议室
Speaker: Valerii Vinokur教授

Argonne National Laboratory, Argonne, IL 60439, USA

We discuss physics of Abrikosov vortices in type II superconductors. Abrikosov vortices, which are the topological excitations of the superconducting order parameter, exhibit a wealth of fascinating properties and phenomena. An interplay of vortex-vortex interactions, thermal fluctuations, and disorder leads to a rich phase diagram and novel phases: Bose and vortex glasses and vortex Mott state. In a glassy state, vortices exhibit nonlinear glassy dynamics, vortex creep. The correspondence between the quantum mechanics and statistical physics makes vortex systems a perfect and unique laboratory for studying many-body quantum strongly correlated systems, in particular out-of-equilibrium Mott transition which is hardly available by other means. In two dimensions vortices mediate Berezinskii-Kosterlitz-Thouless transition bringing a new paradigm, topological phase transition. The duality between vortices and Cooper pairs in two dimensions results in novel superinsulating and Bose-metal states. Finally, vortices became a platform for new development in physics: a non-Hermitian Hamiltonian theory of out of equilibrium phase transitions.

Prof. Vinokur obtained his Ph.D. from the Institute for Solid State Physics Ac. Sci. USSR in Moscow District in 1979. He was a Staff Researcher at the Institute for Solid State Physics from 1972 to 1990 and then joined Argonne National Laboratory as a Scientist. Now he is an Argonne Distinguished Fellow at Argonne National Laboratory and a Senior Fellow at the Computational Institute of the University of Chicago. Prof. Vinokur has made many seminal contributions to condensed matter physics. He pioneered fundamental concepts and models in superconductivity, quantum phase transitions and a theory of out-of-equilibrium processes. Examples include the vortex creep, fundamental nonlinear glass dynamics, thermal depinning, dynamic melting, vortex Bose glass and vortex Mott state, novel superinsulating state, non-Hermitian Hamiltonian theory of out-of-equilibrium phase transitions and many other. His publications have been cited about 20000 times and his H-index is 62. Prof. Vinokur was elected a Fellow of the American Physical Society in 1998 awarded International John Bardeen Prize in 2003, received Alexander von Humboldt Research Awards in 2003 and 2015, elected a Member of the Norwegian National Academy of Science and Letters in 2013, and received an International Abrikosov Prize in 2017.

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