• HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2022-09-23 11:00 
일시 Sep. 23 (Fri.), 11:00AM 
장소 E6-2 #1323 
연사 이길호(포스텍 물리학과 교수) 
세미나 영상은 아래 링크로 확인하시기 바랍니다. (공개기한: 2023.09.22.까지)
o Date / Time : Sep. 23.  2022, 11:00 AM
o Place : Room 1323, KAIST Natural Sciences Lecture Hall(E6) (자연과학동 1323호)
o Zoom Link :   회의 ID: 864 5068 6082
Speaker : Prof. Gil-Ho Lee (Department of Physics, Pohang University)
Talk Title :  Steady Floquet–Andreev states in graphene Josephson junctions
Engineering quantum states through light-matter interaction has created a new paradigm in condensed matter physics. A representative example is the Floquet-Bloch state, which is generated by time-periodically driving the Bloch wavefunctions in crystals. Previous attempts to realise such states in condensed matter systems have been limited by the transient nature of the Floquet states produced by optical pulses, which masks the universal properties of non-equilibrium physics. Here, we report the generation of steady Floquet Andreev (F-A) states in graphene Josephson junctions by continuous microwave application and direct measurement of their spectra by superconducting tunnelling spectroscopy [1]. We present quantitative analysis of the spectral characteristics of the F-A states while varying the phase difference of superconductors, temperature, microwave frequency and power. The oscillations of the F-A state spectrum with phase difference agreed with our theoretical calculations. Moreover, we confirmed the steady nature of the F-A states by establishing a sum rule of tunnelling conductance, and analysed the spectral density of Floquet states depending on Floquet interaction strength. This study provides a basis for understanding and engineering non-equilibrium quantum states in nano-devices.
Attached: C.V
Inquiry: Prof. Se Kwon Kim( / Prof. Hee Jun Yang (
번호 날짜 장소 제목
공지 2022-11-25 11:00  E6-2 #1323  [Update 세미나영상](응집물리 세미나) DMFT+ NRG: From models to real materials, from local to nonlocal correlations
88 2014-05-28 17:00  KI Building, Matrix Hall  부품소재산업이 미래다
87 2016-04-18 15:30  KI빌딩(E4), 강의실 B501 (5F)  First Principles Approaches for Intermolecular Interactions: From Gas-Phase Dimers to Liquid Water and Molecular Crystal Polymorphism file
86 2017-01-09 16:00  Lecture Hall, College of Natural Sciences [#1501,E6-2]  Topological Defects and Phase Transitions" file
85 2016-05-19 15:00  May 19, 2016 (Thur.) 3PM,  The CERN Resonant WISP Search: Development, Results and Lesson-Learned
84 2016-09-05 16:00  Natual Scien Bldg.(E6)m #1501  Physics Colloquium : 2016 Fall file
83 2022-05-19 15:00  online  (광학분야 특별세미나)Development of a multimodal optical system for improved disease diagnosis
82 2022-05-19 15:00  online  (광학분야 특별세미나)Development of a multimodal optical system for improved disease diagnosis
81 2022-03-31 16:00  online  (광학분야 특별세미나)Ultrafast time-resolved spectroscopy in topological materials
80 2021-03-02 16:00  Online  Sensitive terahertz detection with graphene-based transistors file
79 2021-02-17 09:00  Online  석학 대중 강연 및 강의 시리즈 file
78 2020-12-23 10:00  Online  Online workshop for Quantitative Phase Imaging file
77 2020-12-11 16:00  online  Atomic and electronic reconstruction at van der Waals interface in twisted 2D materials
76 2020-12-11 14:30  online  Antisymmetric interlayer exchange coupling in magnetic multilayers
75 2020-11-20 14:30  Online  Lumpy Cooper pairs in an iron-based superconductor
74 2020-11-20 16:00  Online  Coherent control of field gradient induced quantum dot spin qubits
73 2022-06-10 11:00  Online seminar  Record-quality two-dimensional electron systems file
72 2022-06-03 09:30  Online seminar  (Quantum-&Nano-Photonics Webinar) Seeing glass in a new light: reimagine chalcogenide photonics file
71 2022-04-15 11:00  Online seminar  (응집물리 세미나) First-principles studies of polar oxides and their applications file
70 2022-03-18 11:00  Online seminar  (응집물리 세미나) Illuminating exotic states of matter: Raman spectroscopy as an experimental tool to characterize quantum spin liquids file
69 2022-05-27 11:00  Online seminar  Current Status and Future Plans of ADMX file