visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Optical Response in the multilayer thin films

2023.05.09 15:55

admin 조회 수:2818

날짜 2023-05-17 14:00 
연사  
장소 E6 #1323 
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 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
553 2016-04-08 13:30    Theoretical Overview of Iron-based superconductors and its future
552 2016-04-08 16:00    Spectroscopic studies of iron-based superconductors : what have we learned?
551 2016-04-12 16:00    Confinement of Superconducting Vortices in Magnetic Force Microscopy
550 2016-04-18 15:30    First Principles Approaches for Intermolecular Interactions: From Gas-Phase Dimers to Liquid Water and Molecular Crystal Polymorphism file
549 2016-04-19 14:00    Nonlocal collisional electron transport in partially ionized plasma generation, structure, and stability
548 2016-04-26 16:00    Transport spectroscopy for electronic bands in carbon-based nanomaterials with weak-bond contacts
547 2016-04-28 15:00    Lattice/Spin/Charge Coupling in 5d Pyrochlore Cd2Os2O7
546 2016-05-11 16:00    The quest for novel high-temperature superconductors---Prospects and progress in iridates
545 2016-05-13 13:30    Aperiodic crystals in low dimensions
544 2016-05-13 16:00    Graphene analogue in (111)- BaBiO3 bilayer heterostructures for topological electronics
543 2016-05-16 16:00    Tuning microwave cavities with biased nonlinear dielectrics for axion searches
542 2016-05-17 11:00    The CERN Resonant WISP Search: Development, Results and Lesson-Learned
541 2016-05-19 15:00    The CERN Resonant WISP Search: Development, Results and Lesson-Learned
540 2016-05-19 16:00    Nonlinear/quantum optical effect in silicon nano-photonics
539 2016-05-24 16:00    Electronic and magnetic properties of 2D transition-metal thiophosphates and tunability of magnetic order with carrier density
538 2016-05-31 16:00    Understanding 3D tokamak physics towards advanced control of toroidal plasma
537 2016-06-01 10:30    Welcome to Nature Photonics
536 2016-06-01 16:00    Laboratory experiments relevant to mesospheric clouds, Saturn’s rings & astrophysical jets
535 2016-06-14 15:00    No-Insulation High Temperature Superconductor Magnet Technology for Compact, Reliable, and Low-Cost High Field DC Magnets
534 2016-06-14 16:00    Photonic quantum network based on multimode squeezed vacuums and single-photon subtraction