Event | Date | Summary |
Samo Kralj,Josef Stefan Institute in Ljubljana and University of Maribor, Slovenia, Topological defects in nematic liquid crystals: playground of fundamental physics | Mon. December 3rd, 2018 12:45 pm-1:45 pm |
Topological defects in nematic liquid crystals: playground of fundamental physics Samo Kralj
1Faculty of Natural Sciences and Mathematics, University of Maribor, Maribor, Slovenia 2Solid State Department, “Jožef Stefan” Institute, Jamova 39, Ljubljana, Slovenia
Topological defects (TDs) are an unavoidable consequence of continuous symmetry breaking phase transitions [1]. They appear at all scales of physical systems, including particle physics, condensed matter and cosmology. Due to their topological origin they display several universalities that are independent of the systems’ microscopic details. |
Maryam Ghazisaeidi, Ohio State University, High entropy alloys: mechanical properties and phase stability | Mon. November 19th, 2018 12:45 pm-1:45 pm |
High entropy alloys: mechanical properties and phase stability The term “High entropy” alloys (HEA) refers to a relatively new class of multicomponent—usually |
Joe Trodahl, Victoria University of Wellington, Rare-earth nitrides; semiconductors, spin/orbit magnetism, tunnelling MRAM, superconductivity | Mon. November 12th, 2018 12:45 pm-1:45 pm |
Rare-earth nitrides; semiconductors, spin/orbit magnetism, tunnelling MRAM, superconductivity Joe Trodahl MacDiarmid Institute for Advanced Materials and Nanotechnology Victoria University of Wellington New Zealand Controlling the flow of electronic spin in addition to the charge promises speed and power demand advantages. However, there are as yet few “spintronic” devices on the market, in part due to a lack of intrinsic ferromagnetic semiconductors that would permit full exploitation of the coupled spin/charge technology. To date the only full series of such materials are the mononitrides of the lanthanides, the 14 rare-earth elements. |
F. De Angelis, Istituto Italiano di Tecnologia, Genoa, Italy, 3D plasmonic nanostructures for biology and medicine | Mon. November 5th, 2018 12:45 pm-1:45 pm |
3D plasmonic nanostructures for biology and medicine Francesco De Angelis Istituto Italiano di Tecnologia, Genoa, Italy In this talk we will show our last achievements and future perspectives of distinct class of plasmonic devices devoted to biological and medical applications. Among them, we will introduce the concept of meta-electrodes, namely a nanostructured surface that can work as electrode, a broad band plasmonic antenna, and optimal cellular interface (see Figure 1). We show that meta-electrodes combined with commercial CMOS technology enable high quality intracellular electrical signals on the large network scale of human neuron and cardiomyocytes . |
Ezekiel Johnston-Halperin, The Ohio State University, Quantum Magnonics in V[TCNE]2 | Mon. October 29th, 2018 12:45 pm-1:45 pm |
Quantum Magnonics in V[TCNE]2
The study of quantum coherent magnonic interactions relies implicitly on the ability to excite and exploit long lived spin wave excitations in a magnetic material. That requirement has led to the nearly universal reliance on yittrium iron garnet (YIG), which for half a century has reigned as the unchallenged leader in high-Q, low loss magnetic resonance, and more recently in the exploration of coherent quantum coupling between magnonic and spin [1] or superconducting [2] degrees of freedom. Surprisingly, the organic-based ferrimagnet vanadium tetracyanoethylene (V[TCNE]2) has recently emerged as a compelling alternative to YIG. |
Mike Martens (CWRU Physics) | Thu. October 25th, 2018 4:00 pm-5:00 pm |
Conserving Helium: A story of MgB2 superconducting wire and MRI magnets The fabrication of MgB2 superconducting wire has enabled the development of novel magnet designs for MRI systems. Compared to MRI magnets in use today, which are submerged in a bath of liquid helium, the higher critical temperature (39K) of the MgB2 facilitates conduction cooling which reduces the use of liquid helium by a factor of 100 or more. In collaboration with Hyper Tech Research, a world leader in the manufacture of MgB2 wire, and the Center for Superconducting and Magnetic Materials at the Ohio State University, |
Sergey Kravchenko, Northeastern University, The latest developments in the field of the metal-insulator transition in 2D | Mon. October 15th, 2018 12:45 pm-1:45 pm |
Sergey Kravchenko, Northeastern University The latest developments in the field of the metal-insulator transition in 2D Abstract: |
Tim Linden (Ohio State University) | Mon. October 1st, 2018 12:45 pm-1:45 pm |
Michelson Postdoctoral Prize Lecture 1 Astrophysical Signatures of Dark Matter Accumulation in Neutron Stars Over the past few decades, terrestrial experiments have placed increasingly strong limits on the dark matter-nucleon scattering cross-section. However, a significant portion of the standard dark matter parameter space remains beyond our reach. Due to their extreme density and huge gravitational fields, neutron stars stand as optimal targets to probe dark matter-nucleon interactions. For example, over the last few years, the mere existence of Gyr-age neutron stars has placed strong limits on models of asymmetric dark matter. In this talk, |
Alkan Kabakcioglu, Koc University, DNA folding thermo/dynamics with a twist | Mon. September 24th, 2018 12:45 pm-1:45 pm |
DNA folding thermo/dynamics with a twist Alkan Kabakcioglu, Koc University, Istanbul DNA denaturation is possibly one of the earliest problems in biophysics that grabbed the attention of statistical physicists. The nature of the folding/melting transition has been subject to debate since 60’s until a breakthrough in the past decade mostly settled the question. We recently readdressed the problem for circular DNA (which has a topologically imposed, fixed linking number due to helicity) and found that the melting behavior is qualitatively different from that of the unconstrained DNA with freely dangling ends. Continue reading… Alkan Kabakcioglu, Koc University, DNA folding thermo/dynamics with a twist |
no seminar/faculty meeting | Mon. September 17th, 2018 12:45 pm-2:00 pm |