visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Optical Response in the multilayer thin films

2023.05.09 15:55

admin 조회 수:130

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
153 2018-04-06 10:00  #2502, E6  Entanglement and thermalization in many-body systems: recent progress file
152 2018-03-16 16:00  E6-2. 1st fl. #1323  Van der Waals Heterostructures from Quantum Transport to Ultrafast Optoelectronics file
151 2018-03-16 14:30  E6-2. 1st fl. #1323  산화물 다층박막에서의 다양한 물리현상 file
150 2018-02-12 15:00  #C303, (Creation Hall 3F, KAIST Munji Campus)  The recent result of XMASS Experiment
149 2017-12-15 09:20  E6-2, Lecture Room #1323  Workshop on Magnetism in Unconventional Superconductors 개최 file
148 2017-12-14 15:00  Seminar Room (C303), Creation Hall (3F), KAIST Munji Campus  Exploring the Universe via GWs in the era of multi-messenger astronomy
147 2017-12-13 13:30  자연과학동 대형강의실 (1501호)  KAIST-KIAS Joint Workshop in Theoretical Sciences 개최 file
146 2017-11-28 16:00  #1323 (E6-2. 1st fl.)  Physics after the lab and the desk: Your work in PRL file
145 2017-11-08 13:00  #5318 (E6-2. 5th fl.)  “Emergent exotic quasiparticles in quantum spin liquids” file
144 2017-11-03 16:00  #1323 (1st fl., E6-2.)  Expedition to the Kitaev Quantum Spin Liquid: Hunting for Majorana fermions file
143 2017-11-03 14:30  #1323 (1st fl., E6-2.)  Quantum Resistor-Capacitor Circuit with Majorana Edge States file
142 2017-10-10 16:00  E6-2 #1323  Discovery of New 2D Materials with Diverse Physical Properties
141 2017-09-26 11:00  #1323 (E6-2. 1st fl.)  Time-resolved ARPES study of Dirac and topological materials
140 2017-09-22 16:00  E6-2. 1st fl. #1323  Unexpected Electron-Pairing in Integer Quantum Hall Effect file
139 2017-09-22 14:30  E6-2. 1st fl. #1323  Quantum Electronic Transport in Graphene Hybrid Nanostructures file
138 2017-09-22 13:00  E6-2. 1st fl. #1323  Superconductor-metal-insulator transition in thin Tantalum films file
137 2017-09-13 16:00  #1323 (E6-2. 1st fl.)  An Introduction to Quantum Spin Liquids file
136 2017-09-12 16:00  #1323 (E6-2. 1st fl.)  Exact Solution for the Interacting Kitaev Chain at Symmetric Point file
135 2017-08-31 14:00  #5318(E6-2. 5th fl.)  “Berry phase and nonlinear response: photocurrent in noncentrosymmetric insulators and Weyl semimetals” file
134 2017-08-16 16:00  #1322 (E6-2. 1st fl.)  Phonon-driven spin-Floquet valleytro-magnetism file