20201016 Nanoscale magnetic resonance detection towards nano MRI
“Nanoscale magnetic resonance detection towards nano MRI” Dr. Chulki Kim Korea Institute of Science and Technology Oct. 16 (Fri.), 02:30 PM Online seminar Abstract: Magnetic resonance imaging, with its ability to provide three dimensional, elementally selective imaging without radiation damage, has had a revolutionary impact in many fields including medicine and the neurosciences. Although challenging, its extension to the nanometer scale could provide a powerful tool for nanoscience if it…
20200911 Surface/Phase/Interface Engineering for van der Waals Heterostructures
“Surface/Phase/Interface Engineering for van der Waals Heterostructures” Dr. Gwan-Hyoung Lee Materials Science and Engineering, Seoul National University Sep. 11 (Fri.), 04:00 PM Online seminar Abstract: Van der Waals (vdW) materials and their heterostructures, weakly combined by vdW force, have attracted extensive interests because of their unique properties and large degree of freedom in the design of new materials. In the vdW materials, all properties can be dramatically changed by modifying…
20200911 Spin-to-photon quantum interface in semiconductors
“Spin-to-photon quantum interface in semiconductors” Dr. Sang-Yun Lee Department of Physics and Photon Science, GIST Sep. 11 (Fri.), 02:30 PM Online seminar Abstract: Well-isolated color centers in semiconductors act as individual atoms with excellent quantum optical behavior and outstanding spin properties. When efficient and high-fidelity transfer between photonic and spin states is possible, color centers can serve as a spin-to-photon interface which is a building block for various quantum applications…
20191101 Electron transport through weak-bonded contact metal with low dimensional nano-material
“Electron transport through weak-bonded contact metal with low dimensional nanomaterial” Dr. Ju-Jin Kim Department of Physics, Jeonbuk National University Nov. 1 (Fri.), 04:00 PM E6-2. 1st fl. #1323 Abstract: The electrical properties of low-dimensional nano-materials such as carbon nanotube, graphene, layered materials can be effectively tuned by varying the Fermi level pinning position to the metal electrode without conventional substitutional doping. By changing the work function of metal electrode widely,…
20191101 Squeezing the best out of 2D materials
“Squeezing the best out of 2D materials” Dr. YoungWook Kim Department of Emergent Materials Science, DGIST Nov. 1 (Fri.), 02:30 PM E6-2. 1st fl. #1323 Abstract: The study of two dimensional electron systems with extraordinarily low levels of disorder was for a long time the exclusive privilege of the epitaxial thin film research community. The successful isolation of graphene by mechanical exfoliation has, however, been truly disruptive. Furthermore, the assembly…
20190927 0D/1D/2D/3D III-V materials grown by MBE for Optelectronics
“0D/1D/2D/3D III-V materials grown by MBE for Optelectronics” Dr. Jindong Song Center for Opto-Electronic Convergence Systems, KIST Sep. 27 (Fri.), 04:00 PM E6-2. 1st fl. #1323 In KIST, 8 (+1) MBE systems are installed for the study of low dimensional structures. With the MBEs, we are in the middle of studying; As/P/Sb-based materials with new properties, High speed III-V 2DEGs/2DHG for physics (mesoscopic physics, Topo. Insul. etc), high speed (>…
20190927 Spin-charge conversion in topological insulators for spintronic applications
“Spin-charge conversion in topological insulators for spintronic applications” Dr. Joon Sue Lee University of Tennessee, Incoming Assistant Professor in Physics Sep. 27 (Fri.), 02:30 PM E6-2. 1st fl. #1323 Abstract: Surface states of topological insulators (TIs) are characterized by a helical spin texture in momentum space. The spin texture has been demonstrated by spin- and angle-resolve photoemission spectroscopy, and the current-induced spin polarization in the surface states has been detected…
20190910 Two-Stage Kondo Effect
“Two-Stage Kondo Effect” Dr. Mikhail Kiselev The Abdus Salam International Centre for Theoretical Physics (ICTP) Sep. 10 (Tue.), 03:00 PM E6-2. 1st fl. #1323 Abstract: We consider a quantum dot with K>1 orbital levels occupied by two electrons connected to two electric terminals. The generic model is given by a multilevel Anderson Hamiltonian. The weak-coupling theory at the particle-hole symmetric point is governed by a two-channel S=1 Kondo model characterized…
20190731 Features of ballistic superconducting graphene
“Features of ballistic superconducting graphene” Dr. Ivan Borzenets Physics Department, City University of Hong Kong Jul. 31 (Wed.), 04:00 PM E6-2. 1st fl. #1323 Abstract: Achieving superconducting contacts to ultra-clean graphene results in ballistic Josephson junctions. Such devices have opened up several possibilities in realizing novel topological states and has proposed applications in Quantum Information. Namely, under high magnetic fields, combining several superconducting edge states can result in formation of…
20190624 Topological photonic anomalies
“Topological photonic anomalies” Dr. Henning Schomerus Condensed Matter Theory, Lancaster University Jun. 24 (Mon.), 11:00 AM E6-2. 1st fl. #1323 Abstract: Quantum anomalies arise from topological states with distinct properties that typically are probed by external fields. Here I describe how such anomalous properties can be directly observed in photonic systems, including lasers [1,2,3], exciton polaritoncondensates [4] and supersymmetric discrete-time quantum walks [5]. [1] Topologically protected midgap states in complex…