20211203 Topological Spin Textures: Skyrmions and Beyond
“Topological Spin Textures: Skyrmions and Beyond” Dr. Soong-Geun Je Department of Physics, Chonnam National University Dec. 3 (Fri.), 02:30 PM https://kaist.zoom.us/j/85193398774 회의 ID: 851 9339 8774 암호: 867451 Abstract: Magnetic skyrmions have intensively been investigated since the discovery a decade ago. The discovery makes skyrmions potentially interesting for future applications and sparked great interest in exploring rich physics which arise from their topological properties. In this talk, we present recent…
20211029 Manipulation of atomic defect and interlayer configuration in hexagonal boron nitride heterostructures
“Manipulation of atomic defect and interlayer configuration in hexagonal boron nitride heterostructures” Dr. Young Duck Kim Department of Physics, Kyung Hee University Oct. 29 (Fri.), 04:00 PM https://kaist.zoom.us/j/85881284991 회의 ID: 858 8128 4991 암호: 884772 Abstract: Two-dimensional (2D) van der Waals materials including graphene, hexagonal boron nitride (hBN), and transition metal dichalcogenides (TMDCs) have great potential for exploring the exotic quantum behaviors and realization of advanced optoelectronics devices. After the…
20211029 Electron quantum transport characteristics in twisted multi-layers of graphene
“Electron quantum transport characteristics in twisted multi-layers of graphene” Dr. Minsoo Kim Department of Applied Physics, Kyung Hee University Oct. 29 (Fri.), 02:30 PM E6-2. 1st fl. #1323 https://kaist.zoom.us/j/85881284991 회의 ID: 858 8128 4991 암호: 884772 Abstract: Twisted heterostructure of graphene multilayers offers a facile route for the study of topological properties and highly correlated phenomena, such as superconductivity, ferromagnetism, and correlated insulating states. At very small twist angles of…
20210924 Emergence of Majorana bound states in low-dimensional superconductor-magnet hybrid systems
“Emergence of Majorana bound states in low-dimensional superconductor-magnet hybrid systems” Dr. Howon Kim Department of Physics, University of Hamburg Sep. 24 (Fri.), 04:00 PM Online seminar https://kaist.zoom.us/j/88224188486 회의 ID: 882 2418 8486 암호: 080840 Abstract: Realizing Majorana bound states (MBS) in condensed matter systems is a key challenge on the way towards future topological quantum computing. As a promising platform, one-dimensional (1D) magnetic chains on conventional s-wave superconductors were theoretically…
20210924 Coulomb interaction effects in topological materials
“Coulomb interaction effects in topological materials” Dr. Sang Jun Jeon Department of Physics, Chung-Ang University Sep. 24 (Fri.), 02:30 PM Online seminar https://kaist.zoom.us/j/88224188486 회의 ID: 882 2418 8486 암호: 080840 Abstract: Topological materials can be classified into partially gapped (Dirac or Weyl semimetals) or fully gapped (topological insulators) systems. So far, the electronic band structure of the topological materials is based on the symmetry that the material possesses. However, Coulomb…
20210812 Large magnetotransport responses of topological van der Waals magnets
“Large magnetotransport responses of topological van der Waals magnets” Dr. Jun Sung Kim Department of Physics, POSTECH Aug. 12 (Thu.), 09:30 AM Online seminar https://kaist.zoom.us/j/85087535578 회의 ID: 850 8753 5578 암호: 177566 Abstract: Topological semimetals, whose low energy electronic structure possesses several band contact points or lines, are generally expected to exhibit novel transport responses. Particularly, when combined with magnetism, topological band degeneracy is intimately coupled with spin configurations or…
20210811 Ferromagnet-Induced Spin-Orbit Torques
“Ferromagnet-Induced Spin-Orbit Torques” Dr. Kyung-Jin Lee Department of Physics, KAIST Aug. 11 (Wed.), 09:30 AM Online seminar https://kaist.zoom.us/j/85087535578 회의 ID: 850 8753 5578 암호: 177566 Abstract: Spin-orbit torque (SOT), which is considered as a write scheme for next-generation MRAMs, arises from the charge-to-spin conversion via spin-orbit coupling (SOC). For commercialization of SOT-MRAMs, it is of critical importance to enhance the charge-to-spin conversion efficiency, which requires a detailed understanding of various…
20210611 Pseudogap in surface-doped black phosphorus
“Pseudogap in surface-doped black phosphorus” Dr. Keun Su Kim Department of Physics, Yonsei University Jun. 11 (Fri.), 04:00 PM E6-2. 1st fl. #1323 https://kaist.zoom.us/j/89283252628 회의 ID: 892 8325 2628 암호: 916514 Abstract: Many of the interesting quantum phenomena arise at the interface between a crystalline insulator and disordered dopants. In this kind of the interface between black phosphorus and alkali metals, we have studied the tunable band gap1, topological phase…
20210611 Engineering sound waves and vibrations in multi-mode nanomechanical systems
“Engineering sound waves and vibrations in multi-mode nanomechanical systems” Dr. Jin Woong Cha Quantum Technology Institute, KRISS Jun. 11 (Fri.), 02:30 PM Online seminar https://kaist.zoom.us/j/89283252628 회의 ID: 892 8325 2628 암호: 916514 Abstract: Nanoscale mechanical systems provide versatile physical interfaces with their ability to interact with various physical states, for example, electromagnetic fields (e.g., microwaves and optical light) and quantum states (e.g., spins and electrons). Therefore, engineering nanoscale sound waves…
20210514 Spatial and temporal separation of environmental dephasing sources from solid-state quantum emitters
“Spatial and temporal separation of environmental dephasing sources from solid-state quantum emitters” Dr. Je-Hyung Kim Department of Physics and School of Natural Science, UNIST May. 14 (Fri.), 04:00 PM Online seminar https://kaist.zoom.us/j/87512814606 회의 ID: 875 1281 4606 암호: 816956 Abstract: Recent advances in quantum materials enable us to generate and control photonic and spin qubits in solid-state quantum systems. However, environmental noises such as phonon interaction and charge fluctuations inevitably…