visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Optical Response in the multilayer thin films

2023.05.09 15:55

admin 조회 수:145

날짜 2023-05-17 14:00 
일시 May (Wed) 17th, 2pm 
장소 E6 #1323 
연사 YOSHII MAO (Applied physics department, University of Tokyo) 
물리학과 이성빈 교수 연구실에서 세미나를 아래와 같이 안내 드리오니
관심있는 분의 많은 참석 바랍니다.
 
Date: 2pm, 17th May (Wed)
 
Place: E6 #1323
 
Speaker: YOSHII MAO ( Ph.D. student, Applied physics department, University of Tokyo)
 
Title: Optical Response in the multilayer thin films
 
Abstract: 

After the fabrication of the graphene sheet at the beginning of this century, multilayer thin films are attracting huge attention. Since we can control the property by stacking and deforming the layers, these systems are regarded as a new platform for material design. 

In contrast to the interest, these systems lack periodicity in general. As solid state physics today relies heavily on translational symmetry, this hinders us from using the conventional picture in the wave number space and makes the theoretical analysis difficult. However, in the multilayer system, we can also use the wave number space as an approximation. When we stack layers, the layers are coupled through the Van der Waals interaction. As this interaction is very weak and we can treat it as a perturbation for the periodic systems. Through this approximation, we can construct a moiré Hamiltonian and use the wave number space.
 In this talk, I begin with a review of the moiré Hamiltonian approach, and after that, explain the analysis of the second-order optical response[1-2].

 

[1] T. Akamatsu, T. Ideue, S. Kitamura, M. Yoshii, T. Morimoto, Y. Iwasa, et al., Science372, 6537, pp. 68-72 (2021)

[2] Y. Dong, M. M. Yang, M. Yoshii, Y. Iwasa, et al., Nature Nanotechnology (2022)
 
번호 날짜 장소 제목
160 2022-05-30 16:00  E6, #1501  Light manipulation using 2D layered semiconductors
159 2022-06-03 09:30  Online seminar  (Quantum-&Nano-Photonics Webinar) Seeing glass in a new light: reimagine chalcogenide photonics file
158 2022-06-03 11:00  E6-2 #1323  (응집물리 세미나) Theoretical Investigation of Exotic Quantum States in Low-dimensional Materials
157 2022-06-10 11:00  Online seminar  Record-quality two-dimensional electron systems file
156 2022-06-10 14:30  E6-2. 1st fl. #1323  Combinatorial strategy for condensed matter physics: study on rare earth hexaborides thin films file
155 2022-06-10 16:00  E6-2. 1st fl. #1323  Fe5GeTe2의 나선형 자성특성과 자기저항의 전류밀도 의존성 연구 file
154 2022-06-23 11:00  E6 Room(#1322)  JILA’s search for the electron’s Electric Dipole Moment (eEDM) to probe physics beyond the standard model file
153 2022-07-14 13:30  E6 #1501 & Zoom  Electronic structure and anomalous transport properties of topological materials by first principle calculation
152 2022-07-14 14:15  E6 #1501 & Zoom  Hund and electronic correlations in ruthenium-based systems
151 2022-07-14 15:00  E6 #1501 & Zoom  Pure two-dimensional quantum electron liquid and its phase transition
150 2022-07-21 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  Quintessential axions file
149 2022-08-01 10:00  E6 #1501 & Zoom  [Update 세미나 영상] James Webb Space Telescope & OTE Commissioning
148 2022-08-08 14:00  E6-2 #2502  Classical Shadow Tomography for Analog Quantum Simulators
147 2022-08-09 14:00  KI building (E4), Lecture Room Red (B501)  Quantum biology in fluorescent protein: a new model system to study quantum effects in biology file
146 2022-08-12 10:00  E6-1 #1323  Twisted Bilayer Magnets file
145 2022-08-12 10:00  E6-1 #1323  Twisted Bilayer Magnets file
144 2022-08-17 11:00  E6-6 #118호  Robust Hamiltonian Engineering of Large Quantum Systems (큰 양자시스템의 견고한 해밀토니안 엔지니어링)
143 2022-08-18 10:00  E6-1 #1323  Disorder-driven phase transition in the second-order non-Hermitian skin effect
142 2022-09-15 13:00  E6-2, #1323  AdS black holes: a review
141 2022-09-21 10:30  E6-1 #1501  [Update 세미나 영상] Distinguished Lecture 'The Magic of Moiré Quantum Matter' Prof. Pablo Jarillo-Herrero(Department of Physics, MIT) file