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Observation of ultrafast interfacial Meitner-Auger energy transfer in a Van der Waals heterostructure

Dong, Shuo (author)
Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany; Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
Beaulieu, Samuel (author)
Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany; Université de Bordeaux - CNRS - CEA, CELIA, UMR5107, F33405, Talence, France
Selig, Malte (author)
Nichtlineare Optik und Quantenelektronik, Institut für Theoretische Physik, Technische Universität Berlin, 10623, Berlin, Germany
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Rosenzweig, Philipp (author)
Max Planck Institute for Solid State Research, 70569, Stuttgart, Germany
Christiansen, Dominik (author)
Nichtlineare Optik und Quantenelektronik, Institut für Theoretische Physik, Technische Universität Berlin, 10623, Berlin, Germany
Pincelli, Tommaso (author)
Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
Dendzik, Maciej (author)
KTH,Material- och nanofysik,Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
Ziegler, Jonas D. (author)
Institute of Applied Physics and Würzburg-Dresden Cluster of Excellence ct.qmat, Technische Universität Dresden, 01062, Dresden, Germany; Photonics Laboratory, ETH Zürich, 8093, Zürich, Switzerland
Maklar, Julian (author)
Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
Xian, R. Patrick (author)
Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany; Department of Statistical Sciences, University of Toronto, 700 University Avenue, Toronto, ON, M5G 1Z5, Canada
Neef, Alexander (author)
Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
Mohammed, Avaise (author)
Max Planck Institute for Solid State Research, 70569, Stuttgart, Germany
Schulz, Armin (author)
Max Planck Institute for Solid State Research, 70569, Stuttgart, Germany
Stadler, Mona (author)
Institute of Semiconductor Optics and Functional Interfaces, Research Center SCoPE and IQST, University of Stuttgart, 70569, Stuttgart, Germany
Jetter, Michael (author)
Institute of Semiconductor Optics and Functional Interfaces, Research Center SCoPE and IQST, University of Stuttgart, 70569, Stuttgart, Germany
Michler, Peter (author)
Institute of Semiconductor Optics and Functional Interfaces, Research Center SCoPE and IQST, University of Stuttgart, 70569, Stuttgart, Germany
Taniguchi, Takashi (author)
International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan
Watanabe, Kenji (author)
Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan
Takagi, Hidenori (author)
Max Planck Institute for Solid State Research, 70569, Stuttgart, Germany; Department of Physics, University of Tokyo, 113-0033, Tokyo, Japan; Institute for Functional Matter and Quantum Technologies, University of Stuttgart, 70569, Stuttgart, Germany
Starke, Ulrich (author)
Max Planck Institute for Solid State Research, 70569, Stuttgart, Germany
Chernikov, Alexey (author)
Institute of Applied Physics and Würzburg-Dresden Cluster of Excellence ct.qmat, Technische Universität Dresden, 01062, Dresden, Germany
Wolf, Martin (author)
Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
Nakamura, Hiro (author)
Max Planck Institute for Solid State Research, 70569, Stuttgart, Germany; Department of Physics, University of Arkansas, Fayetteville, AR, 72701, USA
Knorr, Andreas (author)
Nichtlineare Optik und Quantenelektronik, Institut für Theoretische Physik, Technische Universität Berlin, 10623, Berlin, Germany
Rettig, Laurenz (author)
Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
Ernstorfer, Ralph (author)
Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany; Institut für Optik und Atomare Physik, Technische Universität Berlin, 10623, Berlin, Germany
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Springer Nature, 2023
2023
English.
In: Nature Communications. - : Springer Nature. - 2041-1723. ; 14:1
Related links:
https://doi.org/10.1...
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https://urn.kb.se/re...
https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Atomically thin layered van der Waals heterostructures feature exotic and emergent optoelectronic properties. With growing interest in these novel quantum materials, the microscopic understanding of fundamental interfacial coupling mechanisms is of capital importance. Here, using multidimensional photoemission spectroscopy, we provide a layer- and momentum-resolved view on ultrafast interlayer electron and energy transfer in a monolayer-WSe2/graphene heterostructure. Depending on the nature of the optically prepared state, we find the different dominating transfer mechanisms: while electron injection from graphene to WSe2 is observed after photoexcitation of quasi-free hot carriers in the graphene layer, we establish an interfacial Meitner-Auger energy transfer process following the excitation of excitons in WSe2. By analysing the time-energy-momentum distributions of excited-state carriers with a rate-equation model, we distinguish these two types of interfacial dynamics and identify the ultrafast conversion of excitons in WSe2 to valence band transitions in graphene. Microscopic calculations find interfacial dipole-monopole coupling underlying the Meitner-Auger energy transfer to dominate over conventional Förster- and Dexter-type interactions, in agreement with the experimental observations. The energy transfer mechanism revealed here might enable new hot-carrier-based device concepts with van der Waals heterostructures.

Subject headings

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)

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