Excitonic Effects in Two-Dimensional Materials

Presentations

• Observation of a many-body excitonic complex in WSe₂ beyond the oxciton

  ORAL

  March 20, 2025, 3:00 PM – March 20, 2025, 3:12 PM

  Presenters

  • Alain Dijkstra

    • Walter Schottky Institute TU Munich

  Authors

  • Alain Dijkstra

    • Walter Schottky Institute TU Munich

  • Amine Ben Mhenni

    • Walter Schottky Institute, TU Munich

  • Dinh Van Tuan

    • University of Rochester

  • Nathan P Wilson

    • Walter Schottky Institute, Technical University of Munich

  • Hanan Dery

    • University of Rochester

  • Jonathan J Finley

    • Walter Schottky Institute, TU Munich

  View abstract →

• Exciton trapping in periodic potentials in monolayer transition metal dichalcogenide crystals as defined by in-plane electric fields

  ORAL

  March 20, 2025, 3:12 PM – March 20, 2025, 3:24 PM

  Presenters

  • Xueqi Chen

    • Stanford University

  Authors

  • Xueqi Chen

    • Stanford University

  • Jierong Wang

    • Stanford University
    • Nanjing Univ

  • Jenny Hu

    • Stanford University

  • Kenji Watanabe

    • National Institute for Materials Science
    • NIMS
    • Research Center for Functional Materials, National Institute for Materials Science
    • Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • Research Center for Functional Materials, National Institute of Material Science, Tsukuba, Japan
    • National Institute of Materials Science
    • Advanced Materials Laboratory, National Institute for Materials Science

  • Takashi Taniguchi

    • National Institute for Materials Science
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • International Center for Materials Nanoarchitectonics, National Institute of Material Science, Tsukuba, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science

  • Thibault Chervy

    • NTT Research, Inc.

  • Tony F Heinz

    • Stanford University

  View abstract →

• Observation of gate-tunable excitonic emissions in suspended MoS₂

  ORAL

  March 20, 2025, 3:24 PM – March 20, 2025, 3:36 PM

  Presenters

  • Thy Doan Mai Le

    • Georgetown University

  Authors

  • Thy Doan Mai Le

    • Georgetown University

  • Shehan de Silva

    • Georgetown University

  • Yijing Liu

    • Georgetown University

  • Ibrahim Boulares

    • US Army Res Dev & Eng Command

  • Charles C Rong

    • US Army Res Dev & Eng Command

  • Edward Richard Van Keuren

    • Georgetown University

  • Sina Najmaei

    • US Army Res Dev & Eng Command

  • Paola Barbara

    • Georgetown University

  View abstract →

• Electrically Tunable Quantum Control for Interlayer Exciton Superlattices with Nanoelectrodes

  ORAL

  March 20, 2025, 3:36 PM – March 20, 2025, 3:48 PM

  Presenters

  • Qitong Li

    • Stanford University

  Authors

  • Qitong Li

    • Stanford University

  • Helen Yao

    • Stanford University

  • Xueqi Chen

    • Stanford University

  • Jiuru Chen

    • Peking University
    • Stanford University

  • Tony F Heinz

    • Stanford University

  View abstract →

• Optical signatures of interlayer electron coherence in a bilayer semiconductor

  ORAL

  March 20, 2025, 3:48 PM – March 20, 2025, 4:00 PM

  Publication: X. Liu, N. Leisgang, P. Dolgirev, A. Zibrov, J. Sung, J. Wang, T. Taniguchi, K. Watanabe, V. Walther, H. Park, et al., Optical signatures of interlayer electron coherence in a bilayer semiconductor, arXiv: 2409.08329 (2024).

  Presenters

  • Xiaoling Liu

    • Harvard University

  Authors

  • Xiaoling Liu

    • Harvard University

  • Nadine Leisgang

    • Harvard University

  • Pavel Dolgirev

    • Harvard University

  • Alexander Zibrov

    • Harvard University

  • Jiho Sung

    • Harvard University

  • Jue Wang

    • Harvard University

  • Valentin Walther

    • Harvard - Smithsonian Center for Astrophysics
    • Purdue University

  • Hongkun Park

    • Harvard University

  • Eugene Demler

    • ETH Zurich

  • Philip Kim

    • Harvard University

  • Mikhail D Lukin

    • Harvard University

  View abstract →

• Stark Effects of Rydberg Excitons in a Monolayer WSe₂ P-N Junction

  ORAL

  March 20, 2025, 4:00 PM – March 20, 2025, 4:12 PM

  Publication: Stark Effects of Rydberg Excitons in a Monolayer WSe2 P–N Junction, Nano Lett. 2024, 24, 16, 4843–4848

  Presenters

  • Lei Ma

    • Rensselaer Polytechnic Institute
    • Carnegie Mellon University / Rensselaer Polytechnic Institute

  Authors

  • Lei Ma

    • Rensselaer Polytechnic Institute
    • Carnegie Mellon University / Rensselaer Polytechnic Institute

  • Zhen Lian

    • Rensselaer Polytechnic Institute

  • Yun-Mei Li

    • Department of Physics, School of Physical Science and Technology, Xiamen University

  • Li Yan

    • Rensselaer Polytechnic Institute
    • Carnegie Mellon University / Rensselaer Polytechnic Institute

  • Dongxue Chen

    • Rensselaer Polytechnic Institute

  • Takashi Taniguchi

    • National Institute for Materials Science
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • International Center for Materials Nanoarchitectonics, National Institute of Material Science, Tsukuba, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science

  • Kenji Watanabe

    • National Institute for Materials Science
    • NIMS
    • Research Center for Functional Materials, National Institute for Materials Science
    • Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • Research Center for Functional Materials, National Institute of Material Science, Tsukuba, Japan
    • National Institute of Materials Science
    • Advanced Materials Laboratory, National Institute for Materials Science

  • Chuanwei Zhang

    • Washington University, St. Louis

  • Sufei Shi

    • Rensselaer Polytechnic Institute
    • Carnegie Mellon University

  View abstract →

• Hybridization of intralayer excitons in transition-metal dichalcogenide heterostructures with excited interlayer excitons

  ORAL

  March 20, 2025, 4:12 PM – March 20, 2025, 4:24 PM

  Presenters

  • Helen Yao

    • Stanford University

  Authors

  • Helen Yao

    • Stanford University

  • Jierong Wang

    • Stanford University
    • Nanjing Univ

  • Emily Yan Chen

    • Stanford University

  • Jonah B Haber

    • Stanford University

  • Ouri Karni

    • Stanford University

  • Kenji Watanabe

    • National Institute for Materials Science
    • NIMS
    • Research Center for Functional Materials, National Institute for Materials Science
    • Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • Research Center for Functional Materials, National Institute of Material Science, Tsukuba, Japan
    • National Institute of Materials Science
    • Advanced Materials Laboratory, National Institute for Materials Science

  • Takashi Taniguchi

    • National Institute for Materials Science
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • International Center for Materials Nanoarchitectonics, National Institute of Material Science, Tsukuba, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science

  • Felipe H da Jornada

    • Stanford University

  • Tony F Heinz

    • Stanford University

  View abstract →

• Temperature-Dependent Excitonic Behavior of Mechanically Exfoliated 2D Tetracene Crystals

  ORAL

  March 20, 2025, 4:24 PM – March 20, 2025, 4:36 PM

  Publication: 1. Kim, D.; Lee, S.; Park, J.; Lee, J.; Choi, H. C.; Kim, K.; Ryu, S. In-plane and out-of-plane excitonic coupling in 2D molecular crystals. Nature communications 2023, 14 (1), 2736.
  2. Koo, S.; Park, I.; Watanabe, K.; Taniguchi, T.; Shim, J. H.; Ryu, S. Extraordinary photostability and davydov splitting in BN-sandwiched single-layer tetracene molecular crystals. Nano Letters 2021, 21 (15), 6600-6608.
  3. Kasha, M. Energy transfer mechanisms and the molecular exciton model for molecular aggregates. Radiation research 1963, 20 (1), 55-70.
  4. Burdett, J. J.; Gosztola, D.; Bardeen, C. J. The dependence of singlet exciton relaxation on excitation density and temperature in polycrystalline tetracene thin films: kinetic evidence for a dark intermediate state and implications for singlet fission. J Chem Phys 2011, 135 (21), 214508.
  5. Hestand, N. J.; Spano, F. C. Expanded theory of H-and J-molecular aggregates: the effects of vibronic coupling and intermolecular charge transfer. Chemical reviews 2018, 118 (15), 7069-7163.

  Presenters

  • SangJin Han

    • Postech

  Authors

  • SangJin Han

    • Postech

  View abstract →

• Electrically tunable ultrafast dynamics and interactions of hybrid excitons in semiconducting bilayers

  ORAL

  March 20, 2025, 4:36 PM – March 20, 2025, 4:48 PM

  Publication: Planned paper title: Electrically tunable ultrafast dynamics and interactions of hybrid excitons in semiconducting bilayers

  Presenters

  • Edoardo Lopriore

    • Ecole Polytechnique Federale de Lausanne

  Authors

  • Edoardo Lopriore

    • Ecole Polytechnique Federale de Lausanne

  • Charalambos Louca

    • Politecnico di Milano

  • Armando Genco

    • Politecnico di Milano

  • Irantzu Landa Garcia

    • Politecnico di Milano

  • Daniel Erkensten

    • Philipps-Universität Marburg

  • Charles Sayers

    • Politecnico di Milano

  • Samuel Brem

    • Philipps-Universität Marburg

  • Raul Perea-Causin

    • Stockholm University

  • Kenji Watanabe

    • National Institute for Materials Science
    • NIMS
    • Research Center for Functional Materials, National Institute for Materials Science
    • Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • Research Center for Functional Materials, National Institute of Material Science, Tsukuba, Japan
    • National Institute of Materials Science
    • Advanced Materials Laboratory, National Institute for Materials Science

  • Takashi Taniguchi

    • National Institute for Materials Science
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • International Center for Materials Nanoarchitectonics, National Institute of Material Science, Tsukuba, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science

  • Christoph Gadermaier

    • Politecnico di Milano

  • Ermin Malic

    • University of Marburg

  • Giulio Cerullo

    • Politecnico di Milano

  • Stefano Dal Conte

    • Politecnico di Milano

  • Andras Kis

    • Ecole Polytechnique Federale de Lausanne
    • École Polytechnique Fédérale de Lausanne

  View abstract →

• 2D Material Fabrication Strategies for The Study of Doubly Charged Exciton Complexes

  ORAL

  March 20, 2025, 4:48 PM – March 20, 2025, 5:00 PM

  Publication: Manuscript in preparation

  Presenters

  • Daniel Vaz

    • University of Pittsburgh

  Authors

  • Daniel Vaz

    • University of Pittsburgh

  View abstract →

• Definitive Evidence of Excitonic Charged Bosons in a bilayer system

  ORAL

  March 20, 2025, 5:00 PM – March 20, 2025, 5:12 PM

  Publication: [1] Barbone, Matteo, et al. Nature Communications 9.1 (2018): 3721.
  [2] Zheng Sun, et al., Nano letters 21 7669 (2021).

  Presenters

  • Qiaochu Wan

    • University of Pittsburgh

  Authors

  • Qiaochu Wan

    • University of Pittsburgh

  • Daniel Vaz

    • University of Pittsburgh

  • Li Xiang

    • Florida State University

  • Anshul Ramavath

    • University of Pittsburgh

  • Anshul Ramavath

    • University of Pittsburgh

  • Juntong Ye

    • University of Pittsburgh

  • Jonathan C Beaumariage

    • University of Pittsburgh

  • Kenji Watanabe

    • National Institute for Materials Science
    • NIMS
    • Research Center for Functional Materials, National Institute for Materials Science
    • Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • Research Center for Functional Materials, National Institute of Material Science, Tsukuba, Japan
    • National Institute of Materials Science
    • Advanced Materials Laboratory, National Institute for Materials Science

  • Takashi Taniguchi

    • National Institute for Materials Science
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • International Center for Materials Nanoarchitectonics, National Institute of Material Science, Tsukuba, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science

  • Zheng Sun

    • East China Normal University

  • Dmitry Smirnov

    • National High Magnetic Field Laboratory

  • Nathan Youngblood

    • University of Pittsburgh

  • Igor V Bondarev

    • North Carolina Central University

  • David W Snoke

    • University of Pittsburgh

  View abstract →

• Magnetic field effect on quaternion excitonic complexes in bilayer structures near metals

  ORAL

  March 20, 2025, 5:12 PM – March 20, 2025, 5:24 PM

  Publication: manuscript in preparation

  Presenters

  • Igor V Bondarev

    • North Carolina Central University

  Authors

  • Igor V Bondarev

    • North Carolina Central University

  • Qiaochu Wan

    • University of Pittsburgh

  • David W Snoke

    • University of Pittsburgh

  View abstract →

• Spatial confinement of excitons in van-der-Waals monolayers induced by electric fields from an adjacent ferroelectric material

  ORAL

  March 20, 2025, 5:24 PM – March 20, 2025, 5:36 PM

  Presenters

  • Jierong Wang

    • Stanford University
    • Nanjing Univ

  Authors

  • Jierong Wang

    • Stanford University
    • Nanjing Univ

  • Jiuru Chen

    • Stanford University

  • Jenny Hu

    • Stanford University

  • Kenji Watanabe

    • National Institute for Materials Science
    • NIMS
    • Research Center for Functional Materials, National Institute for Materials Science
    • Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • Research Center for Functional Materials, National Institute of Material Science, Tsukuba, Japan
    • National Institute of Materials Science
    • Advanced Materials Laboratory, National Institute for Materials Science

  • Takashi Taniguchi

    • National Institute for Materials Science
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • International Center for Materials Nanoarchitectonics, National Institute of Material Science, Tsukuba, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science

  • Tony F Heinz

    • Stanford University

  View abstract →

• Abstract Withdrawn

  ORAL · Withdrawn

  March 20, 2025, 5:36 PM – March 20, 2025, 5:48 PM

  View abstract →

• Layer-dependent exciton formation in two-dimensional crystals of perylene derivatives

  ORAL

  March 20, 2025, 5:48 PM – March 20, 2025, 6:00 PM

  Publication: [1] Engels, B.; Engel, V. The dimer-approach to characterize opto-electronic properties of and exciton trapping and diffusion in organic semiconductor aggregates and crystals. Phys. Chem. Chem. Phys. 2017, 19 (20), 12604-12619.
  [2] Kim, D.; Lee, S.; Park, J.; Lee, J.; Choi, H. C.; Kim, K.; Ryu, S. In-plane and out-of-plane excitonic coupling in 2D molecular crystals. Nat. Commun. 2023, 14 (1), 2736.

  Presenters

  • Seung Il Ahn

    • Pohang University of Science and Technology

  Authors

  • Seung Il Ahn

    • Pohang University of Science and Technology

  • Sunmin Ryu

    • Pohang Univ of Sci & Tech

  View abstract →