visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
장소 E6 #1501 & Zoom 
일시 Jul. 14th (THU), 15:00 
연사 Dr. Sunghun Kim(Institute of Natural Science, KAIST) 

7/14(목) 물리학과 문은국 교수 연구실에서 개최하는 세미나를 안내 드립니다.

 

- Title: Pure two-dimensional quantum electron liquid and its phase transition
- Speaker: Dr. Sunghun Kim(Institute of Natural Science, KAIST)
-  Date: Jul. 14th (THU), 15:00, E6 #1501

https://us02web.zoom.us/j/87068327099?pwd=SXlyZTRkSnhEeW1GTlFjaW45SW1nUT09

회의 ID: 870 6832 7099

암호: 977538

 

Abstract: 

Pure electrons spread in two-dimensional (2D) space can have several different phases of gas, liquid, and even solid – so called Wigner crystal, determined by their kinetic and potential energies. In quantum regime, it is expected to have diverse intermediate phases between Fermi liquid and Wigner crystal phase rendered by the quantum fluctuation with exclusive electron-electron interactions. In this regard, there have been many efforts to realize pure quantum electron phases and unveil its intriguing physics. However, the requirements to realize such quantum electrons at solid systems set a huge hurdle that the most of the experimental investigations have been limited in the classical regime so far. 

 

In this talk, I present the discovery of pure 2D quantum electron liquid formed on solid 2D electride at relatively high temperature of 10 K and its phase transition. Using photoemission spectroscopy and first-principles calculation, we characterized the dense surface electrons decoupled from the top-most layer that means free from other degrees of freedom. By reducing the density of 2D electron system, we observed dynamics change to that of non-Fermi liquid along with anomalous band deformation, accompanied by conserved translational symmetry and reduced rotational symmetry, that suggests a possible phase transition to the hexatic liquid crystal phase. These results can provide further opportunities to study the role of electron-electron interaction which can drive Wigner crystal and various intermediate phases in quantum regime
번호 일시 장소 연사 제목
공지 Sep.22 2022  E6-1 #1323    2022 가을학기 응집물리 및 광학 세미나 전체 일정
415 Sep. 21(Wed.) 10:30~12:00  E6-1 #1501  Pablo Jarillo-Herrero(Department of Physics, MIT)  Distinguished Lecture 'The Magic of Moiré Quantum Matter' file
414 Sep. 30 (Fri.), 04:00 PM  E6-2. 1st fl. #1323 & Zoom  Dr. Byong-Guk Park (Materials Science and Engineering,KAIST)  Spin-orbit torque-based spintronic devices file
413 Sep. 30 (Fri.), 02:30 PM  E6-2. 1st fl. #1323 & Zoom  Dr. Sunghun Park (IBS-PCS)  Putting a spin on the Josephson effect file
412 Sep. 15th (Thu) 1 PM  E6-2, #1323  Dr.Christopher Couzens(Kyunghee University)  AdS black holes: a review
411 Sep. 21, Wed. 4:00 PM  College of Natural Science E6-2, Rm. 1323  Prof. Duk-Yong Choi (Australian National University)  Materials and Device Nanofabrication of Optical Metasurfaces file
410 Nov. 24 (Thu) 2022, 4:00PM  E6-2 #1323  유정완(기초과학연구원, Center for Theoretical Physics of Complex Systems 교수)  (광학분야 세미나) Non-Hermitian physics and non-Hermitian singularity
409 Nov. 17 (Thu), 4:00PM  E6-2 #1323  김두리(한양대학교 화학과 교수)  (광학분야 세미나) Ultrastructural and Spectroscopic Studies by Super-Resolution Fluorescence Microscopy
408 Nov. 3 (Thu), 4:00PM  E6-2 #1323  문효원(한국과학기술원연구원 박사)  (광학분야 세미나) Single-photon emission from low-dimensional materials
407 Oct. 27 (Thu), 4:00PM  E6-2 #1323  서준호(한국표준연구원 박사)  (광학분야 세미나) Cavity optomechanical systems for quantum transduction
406 Oct. 13 (Thu), 4:00PM  E6-2 #1323  김영진(KAIST 기계공학과 교수)  (광학분야 세미나) Ultrafast Optics for Ultra-Precision Metrology and Realization of Flexible/Stretchable Laser-Induced-Graphene Electronics
405 Sep. 29 (Thu), 4:00PM  E6-2 #1323  강봉주(한국화학연구원 박사)  (광학분야 세미나) Ultrafast THz Field-Induced Nonlinear Optics
404 Sep. 22 (Thu), 4:00PM  E6-2 #1323  김동하(KAIST 물리학과 박사)  (광학분야 세미나) Quasi-particle-like optical vortices in magnetic materials
403 Dec. 9 (Fri), 11:00AM  E6-2 #1323  김도헌(서울대 물리천문학부 교수)  (응집물리 세미나) Single-shot measurements of strongly-correlated artificial molecular levels in semiconductor quantum dots
402 Nov. 25 (Fri), 11:00AM  E6-2 #1323  이승섭(서울대 물리천문학부 교수)  (응집물리 세미나) DMFT+ NRG: From models to real materials, from local to nonlocal correlations
401 Nov. 11 (Fri), 11:00AM  E6-2 #1323  손창희(UNIST 물리학과 교수)  (응집물리 세미나) Honeycomb oxide heterostructures for quantum spin liquid
400 Oct. 28 (Fri), 11:00AM  E6-2 #1323  김수란(경북대 물리교육과 교수)  (응집물리 세미나) Machine-Learning-Guided Prediction models and Materials discovery for high Tc cuprates
399 Oct. 7 (Fri), 11:00AM  E6-2 #1323  김영국(성균관대 물리학과 교수)  (응집물리 세미나) Competing orders in a vanadium-based kagome metal monolayer
398 Sep. 23 (Fri.), 11:00AM  E6-2 #1323  이길호(포스텍 물리학과 교수)  (응집물리 세미나) Steady Floquet-Andreev states in graphene Josephson junctions file
397 Aug.18 (Thr), 10:00 AM  E6-1 #1323  Dr. Kyoung-Min Kim (Center for Theoretical Physics of Complex Systems, IBS)  Disorder-driven phase transition in the second-order non-Hermitian skin effect