Calendar of Physics Talks Vienna

Correlation Effects on Topological Insulators
Speaker:Norio Kawakami ( Kyoto University)
Abstract:Topological insulators have attracted much attention as a new research platform in condensed matter physics. We discuss the correlation effects on topological insulators by applying dynamical mean field theory to a generalized Bernevig-Hughes-Zhang model (i.e. a correlated two-band model with spin-orbit interaction). We discuss (i) an interaction-driven phase transition between the topological and Mott insulators, (ii) a topologically non-trivial antiferromagnetic insulator and (iii) a new exotic phase "spin-selective topological Kondo insulator", where a topological Kondo insulator is embedded in a ferromagnetic metal.
Date: Mon, 16.09.2013
Time: 15:00
Duration: 60 min
Location:Freihaus HS 138C, TU Vienna

Ferroelectricity in ferroelastic twin boundaries (& tweed) and their dynamics
Speaker:Prof. Ekhard Salje (Cambridge University/U.K.)
Abstract:A new approach to generate functional materials and to investigate the dynamics of jamming avalanches is to engineer functional interfaces. I will discuss the special case of functional twin boundaries which were superconducting in an insulating matrix or ferroelectric in a paraelectric bulk. Functionalities and their origins will be discussed.
Date: Tue, 17.09.2013
Time: 16:00
Location:Technische Universität Wien, Institut für Angewandte Physik, Seminarraum 134A, Turm B (gelbe Leitfarbe), 5. OG, 1040 Wien, Wiedner Hauptstraße 8-10
Contact:Univ.Prof. Dr. Ulrike Diebold

From transition-metal to carbon-based superconductors --- a theoretical outlook
Speaker:Prof. Hideo Aoki (University of Tokyo)
Date: Thu, 19.09.2013
Time: 16:00
Duration: 60 min
Location:Freihaus HS 138C

Search for Muon to Electron Conversion at J-PARC - COMET experiment
Speaker:Yoshitaka KUNO (Osaka)
Abstract:Muon to electron conversion in a muonic atom is a process of charged lepton flavor violation (CLFV). The COMET experiment aims to search for muon to electron conversion at J-PARC with single-event sensitivity of 3x10-17. which is about 10,000 improvement over the current limit. Recently the COMET experiment has taken a staged approach. COMET Phase-I. as the first phase, aims at a single-event sensitivity of 3x10-15 with a partial part of the full muon beam line and a Phase-I dedicated detector in the order of about 10^6 sec. The funds for COMET Phase-I has been approved as the supplemental budget, and the construction will start in 2013. The physics run is expected to start in 2016 or so. The COMET Phase-II will follow immediately. In this talk, I will describe physics motivation of CLFV, and the details of COMET Phase-I / Phase-II, with the present status of Phase-I.
Date: Fri, 20.09.2013
Time: 17:00
Duration: 60 min
Location:Seminar room, Boltzmanngasse 3, Room 2.08
Contact:Ken Suzuki