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SUMMARY:Teratronics in the quantum flatland
DTSTART:20250523T151500
DTSTAMP:20260415T235735Z
UID:caf3307a8ffdf0e0f0af19981810ce0899caec7b60e4a7701d01d11e
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Denis Bandurin National University of Singapore\nSince t
 he isolation of graphene\, devices based on novel low-dimensional material
 s and their heterostructures have unlocked vast opportunities for explorin
 g new fundamental phenomena. Reduced dimensionality\, unique band structur
 es\, quantum geometry\, and strong quasiparticle interactions collectively
  shape the response of these materials to external fields\, offering a pow
 erful platform to probe novel light-matter interactions and prototype futu
 re optoelectronic technologies.\nIn the first part of my presentation\, I 
 will introduce terahertz-driven magnetotransport as a novel multi-messenge
 r probe for investigating the properties of quantum materials. We will exp
 lore how terahertz excitation in moiré superlattices can reveal deeper in
 sights into their interaction-driven and topological properties [1]. Next\
 , I will discuss the use of terahertz excitation to initiate hydrodynamic 
 electron transport\, demonstrating the emergence of viscous terahertz phot
 oconductivity—a behavior distinct from all known types of photoconductiv
 ity in conventional materials [2]. We will also discuss potential applicat
 ions of viscous terahertz bolometers. Finally\, I will present the near-fi
 eld excitation of ultra-slow Bernstein collective modes in graphene\, whos
 e diverging density of plasmonic states can lead to strong magnetoabsorpti
 on at terahertz frequencies [3]. We will discuss how these modes provide a
  tool for testing the tomographic Fermi liquid hypothesis [4].\n\n\nRefere
 nces:\n1. High-mobility compensated semimetals\, orbital magnetization\, 
 and umklapp scattering in bilayer graphene moiré superlattices\, A. L. Sh
 ilov\, M. A. Kashchenko\, P. A. Pantaleón\, M. Kravtsov\, A. Kudriashov\,
  Z. Zhan\, T. Taniguchi\, K. Watanabe\, S. Slizovskiy\, K. S. Novoselov\, 
 V. I. Fal'ko\, F. Guinea\, D. A. Bandurin\; ACS Nano 18\, 18\, 11769–117
 77 (2024).\n2. Viscous Terahertz Photoconductivity of Hydrodynamic Electr
 ons in Graphene\, M. Kravtsov\, A. L. Shilov\, Y. Yang\, T. Pryadilin\, M.
  A. Kashchenko\, O. Popova\, M. Titova\, D. Voropaev\, Y. Wang\, K. Shein\
 , I. Gayduchenko\, G. N. Goltsman\, M. Lukianov\, A. Kudriashov\, T. Tanig
 uchi\, K. Watanabe\, D. A. Svintsov\, K. S. Novoselov\, S. Adam\, A. Princ
 ipi\, D. A. Bandurin\; Nature Nanotechnology in press (2024).\n3. Cyclotr
 on resonance overtones and near-field magnetoabsorption via terahertz Bern
 stein modes in graphene\; D. A. Bandurin\, E. Moench\, K. Kapralov\, I. Y.
  Phinney\, K. Lindner\, S. Liu\, J. H. Edgar\, I. A. Dmitriev\, P. Jarillo
 -Herrero\, D. Svintsov\, S. D. Ganichev\, Nature Physics 18\, 462–467 (2
 022).\n\n4. Testing the tomographic Fermi liquid hypothesis with high-ord
 er cyclotron resonance\; I. Moiseenko\, E. Mönch\, K. Kapralov\, D.A. Ban
 durin\, S. Ganichev\, D. Svintsov\, arXiv:2409.05147 (2024). \n\n 
LOCATION:PH L1 503 https://plan.epfl.ch/?room==PH%20L1%20503 https://epfl.
 zoom.us/j/69823646374?pwd=mYUfXk7hNOyXYh238nfzg8CTbqjaQO.1
STATUS:CONFIRMED
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