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Spectroscopic view of ultrafast charge carrier dynamics in single- and bilayer transition metal dichalcogenide semiconductors
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- Majchrzak, Paulina (författare)
- Aarhus Univ, Interdisciplinary Nanosci Ctr, Dept Phys & Astron, DK-8000 Aarhus C, Denmark.
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- Volckaert, Klara (författare)
- Aarhus Univ, Interdisciplinary Nanosci Ctr, Dept Phys & Astron, DK-8000 Aarhus C, Denmark.
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- Grubisic-Cabo, Antonija (författare)
- KTH,Tillämpad fysik
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- Biswas, Deepnarayan (författare)
- Aarhus Univ, Interdisciplinary Nanosci Ctr, Dept Phys & Astron, DK-8000 Aarhus C, Denmark.
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- Bianchi, Marco (författare)
- Aarhus Univ, Interdisciplinary Nanosci Ctr, Dept Phys & Astron, DK-8000 Aarhus C, Denmark.
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- Mahatha, Sanjoy K. (författare)
- DESY, Ruprecht Haensel Lab, D-22607 Hamburg, Germany.
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- Dendzik, Maciej (författare)
- KTH,Material- och nanofysik
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- Andreatta, Federico (författare)
- Aarhus Univ, Interdisciplinary Nanosci Ctr, Dept Phys & Astron, DK-8000 Aarhus C, Denmark.
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- Gronborg, Signe S. (författare)
- Aarhus Univ, Interdisciplinary Nanosci Ctr, Dept Phys & Astron, DK-8000 Aarhus C, Denmark.
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- Markovic, Igor (författare)
- Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland.;Max Planck Inst Chem Phys Solids, Nothnitzer Str 40, D-01187 Dresden, Germany.
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- Riley, Jonathon M. (författare)
- Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland.
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- Johannsen, Jens C. (författare)
- Ecole Polytech Fed Lausanne EPFL, Inst Condensed Matter Phys, Lausanne, Switzerland.
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- Lizzit, Daniel (författare)
- Univ Udine, DPIA, Via Sci 206, I-33100 Udine, Italy.
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- Bignardi, Luca (författare)
- Univ Trieste, Dept Phys, Via Valerio 2, I-34127 Trieste, Italy.
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- Lizzit, Silvano (författare)
- Elettra Sincrotrone Trieste SCpA, SS 14 Km 163-5, I-34149 Trieste, Italy.
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- Cacho, Cephise (författare)
- Diamond Light Source, Didcot OX11 0DE, Oxon, England.
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- Alexander, Oliver (författare)
- STFC Rutherford Appleton Lab, Cent Laser Facil, Harwell, Berks, England.
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- Matselyukh, Dan (författare)
- STFC Rutherford Appleton Lab, Cent Laser Facil, Harwell, Berks, England.
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- Wyatt, Adam S. (författare)
- STFC Rutherford Appleton Lab, Cent Laser Facil, Harwell, Berks, England.
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- Chapman, Richard T. (författare)
- STFC Rutherford Appleton Lab, Cent Laser Facil, Harwell, Berks, England.
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- Springate, Emma (författare)
- STFC Rutherford Appleton Lab, Cent Laser Facil, Harwell, Berks, England.
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- Lauritsen, Jeppe, V (författare)
- Aarhus Univ, Interdisciplinary Nanosci Ctr, Dept Phys & Astron, DK-8000 Aarhus C, Denmark.
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- King, Phil D. C. (författare)
- Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland.
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- Sanders, Charlotte E. (författare)
- Aarhus Univ, Interdisciplinary Nanosci Ctr, Dept Phys & Astron, DK-8000 Aarhus C, Denmark.
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- Miwa, Jill A. (författare)
- Aarhus Univ, Interdisciplinary Nanosci Ctr, Dept Phys & Astron, DK-8000 Aarhus C, Denmark.
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- Hofmann, Philip (författare)
- Aarhus Univ, Interdisciplinary Nanosci Ctr, Dept Phys & Astron, DK-8000 Aarhus C, Denmark.
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- Ulstrup, Soren (författare)
- Aarhus Univ, Interdisciplinary Nanosci Ctr, Dept Phys & Astron, DK-8000 Aarhus C, Denmark.
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Aarhus Univ, Interdisciplinary Nanosci Ctr, Dept Phys & Astron, DK-8000 Aarhus C, Denmark Tillämpad fysik (creator_code:org_t)
- Elsevier BV, 2021
- 2021
- Engelska.
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Ingår i: Journal of Electron Spectroscopy and Related Phenomena. - : Elsevier BV. - 0368-2048 .- 1873-2526. ; 250
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The quasiparticle spectra of atomically thin semiconducting transition metal dichalcogenides (TMDCs) and their response to an ultrafast optical excitation critically depend on interactions with the underlying substrate. Here, we present a comparative time- and angle-resolved photoemission spectroscopy (TR-ARPES) study of the transient electronic structure and ultrafast carrier dynamics in the single- and bilayer TMDCs MoS2 and WS2 on three different substrates: Au(111), Ag(111) and graphene/SiC. The photoexcited quasiparticle bandgaps are observed to vary over the range of 1.9-2.5 eV between our systems. The transient conduction band signals decay on a sub-50 fs timescale on the metals, signifying an efficient removal of photoinduced carriers into the bulk metallic states. On graphene, we instead observe a fast timescale on the order of 170 fs, followed by a slow dynamics for the conduction band decay in MoS2. These timescales are explained by Auger recombination involving MoS2 and in-gap defect states. In bilayer TMDCs on metals we observe a complex redistribution of excited holes along the valence band that is substantially affected by interactions with the continuum of bulk metallic states.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Time-and angle-resolved photoemission spectroscopy
- Transition metal dichalcogenides
- Ultrafast carrier dynamics
- Bandgap renormalization
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Majchrzak, Pauli ...
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Volckaert, Klara
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Grubisic-Cabo, A ...
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Biswas, Deepnara ...
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Bianchi, Marco
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Mahatha, Sanjoy ...
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visa fler...
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Dendzik, Maciej
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Andreatta, Feder ...
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Gronborg, Signe ...
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Markovic, Igor
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Riley, Jonathon ...
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Johannsen, Jens ...
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Lizzit, Daniel
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Bignardi, Luca
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Lizzit, Silvano
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Cacho, Cephise
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Alexander, Olive ...
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Matselyukh, Dan
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Wyatt, Adam S.
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Chapman, Richard ...
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Springate, Emma
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Lauritsen, Jeppe ...
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King, Phil D. C.
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Sanders, Charlot ...
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Miwa, Jill A.
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Hofmann, Philip
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Ulstrup, Soren
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