170922 Unexpected Electron-Pairing in Integer Quantum Hall Effect
“Unexpected Electron-Pairing in Integer Quantum Hall Effect” Dr. HyungKook Choi Department of Physics, Chonbuk National University Sep. 22 (Fri.), 04:00 PM E6-2. 1st fl. #1323 Abstract: Electronic interferometry has played a significant role in investigating some of the most fundamental and subtle issues of quantum physics, such as decoherence, entanglement and complementarity etc. Recently, we report on a novel phenomenon observed in an electronic Fabry-Perot Interferometer (eFPI) operating in the…
170922 Quantum Electronic Transport in Graphene Hybrid Nanostructures
“Quantum Electronic Transport in Graphene Hybrid Nanostructures” Dr. GilHo Lee Department of Physics, POSTECH Sep. 22 (Fri.), 02:30 PM E6-2. 1st fl. #1323 Abstract: Ever since discovered, graphene has brought in high-energy relativistic quantum mechanics to low-energy condensed matter system. Exploiting its unique relativistic characters and electrostatic tunability, ballistic graphene has a great potential leading us to novel electronic optical quantum devices. When electrons tunnel p-n barriers, that is termed…
170922 Superconductor-metal-insulator transition in thin Tantalum films
“Superconductor-metal-insulator transition in thin Tantalum films” Dr. EunSeong Kim Department of Physics, KAIST Sep. 22 (Fri.), 01:00 PM E6-2. 1st fl. #1323 Abstract: The superconductor–insulator (SI) transition in two-dimensional Ta thin films is investigated by controlling both film thickness and magnetic field. An intriguing metallic phase appears between a superconducting and an insulating phase within a range of film thickness and magnetic field. In order to understand the nature of…
170602 Maxwell’s demon in quantum wonderland
“Maxwell’s demon in quantum wonderland” Dr. Sang Wook Kim Dept of Physics Education, Pusan National University Jun. 2 (Fri.), 04:00 PM E6-2. 1st fl. #1323 Abstract: In this talk we will discuss the quantum mechanical nature of Maxwell’s demon both in dynamical and in information point of view and how to exorcise it. The Szilard engine (SZE) is the quintessence of Maxwell’s demon, which can extract the work from a…
170602 Quasiparticle Interference and Fourier transform scanning tunneling spectroscopy in WTe2 (Weyl semimetal)
“Quasiparticle Interference and Fourier transform scanning tunneling spectroscopy in WTe2 (Weyl semimetal)” Dr. Euyheon Hwang SAINT and Department of Nanoscience and Technology, Sungkyunkwan University Jun. 2 (Fri.), 02:30 PM E6-2. 1st fl. #1323 Abstract: The effect of quasiparticle interference (QPI) on the spatial variations of the local density of states in topological Weyl semimetal will be presented. We consider the QPI on WTe2 which are known as the type II…
170428 Carbon nanotubes coupled to superconducting impedance matching circuits
“Carbon nanotubes coupled to superconducting impedance matching circuits” Dr. Minkyung Jung Research Institute, DGIST Apr. 28 (Fri.), 04:00 PM E6-2. 1st fl. #1323 Abstract: Coupling carbon nanotube devices to microwave circuits offers a significant increase in bandwidth and signal-to-noise ratio. These facilitate fast non-invasive readouts important for quantum optics, shot noise and correlation measurements. Here, we successfully couple a carbon nanotube (CNT) double quantum dot to a GHz superconducting matching…
170428 Hot electron generation at surfaces and its impact to catalysis and renewable energy conversion
“Hot electron generation at surfaces and its impact to catalysis and renewable energy conversion” Dr. JeongYoung Park Graduate School of EEWS, KAIST Apr. 28 (Fri.), 02:30 PM E6-2. 1st fl. #1323 Abstract: A pulse of high kinetic energy electrons (1–3 eV) in metals can be generated after surface exposure to external energy, such as the absorption of light or exothermic chemical processes. These energetic electrons are not at thermal equilibrium…
170324 Graphene based nano electronics and nano electromechanics; focusing on precise control of nano structures for studying accurate physical properties
“Graphene based nano electronics and nano electromechanics; focusing on precise control of nano structures for studying accurate physical properties” Dr. SangWook Lee Department of Physics, Ewha Womans University Mar. 24 (Fri.), 16:00 PM E6-2. 1st fl. #1323 Abstract: In this presentation, we will present our recent progress on the fabrication and characterization of graphene based nano electronic and electromechanical devices. Mirco contact transfer method have been utilized for controlling the…
170324 Topological Dynamics
“Topological Dynamics” Dr. MahnSoo Choi Department of Physics, Korea University Mar. 24 (Fri.), 14:30 PM E6-2. 1st fl. #1323 Abstract: The topological materials such as topological insulators and Weyl semimetals are inherently characterized by the non-vanishing topological quantum numbers, which are discrete and hence do not permit differential equation for their dynamics. It raises a fundamental issue concerning a possible theoretical framework to describe the dynamics of the topological order.…
170201 Quantum electron optics using flying electrons
“Quantum electron optics using flying electrons” Dr. Michihisa Yamamoto Department of Applied Physics, The University of Tokyo Feb. 1 (Wed.), 14:00 PM E6-2. 1st fl. #1323 Abstract: Quantum electron optics is a field in which one manipulates quantum states of propagating electrons. Combined with technologies for confining and manipulating single electrons, it allows us to investigate the scattering and interference of electrons in a unit of a single electron. The…