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  Band structure dynamics in indium wires

Chavez Cervantes, M., Krause, R., Aeschlimann, S., & Gierz, I. (2018). Band structure dynamics in indium wires. Phys. Rev. B, 97(20): 201401(R). doi:10.1103/PhysRevB.97.201401.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-DBA3-C Version Permalink: http://hdl.handle.net/21.11116/0000-0006-CF47-2
Genre: Journal Article

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PhysRevB.97.201401.pdf (Publisher version), 4MB
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SupMat_ChavezCervantes_resubmission2.pdf (Supplementary material), 3MB
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The Supplemental Material contains further information about sample growth, tr-ARPES setup, data analysis, and more tr-ARPES data including three figures.
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https://dx.doi.org/10.1103/PhysRevB.97.201401 (Publisher version)
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https://arxiv.org/abs/1803.05189 (Preprint)
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 Creators:
Chavez Cervantes, M.1, 2, 3, Author              
Krause, R.2, 3, Author
Aeschlimann, S.2, 3, Author
Gierz, I.2, 3, Author
Affiliations:
1International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266714              
2Ultrafast Electron Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_persistent22              
3Center for Free Electron Laser Science, ou_persistent22              

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 Abstract: One-dimensional indium wires grown on Si(111) substrates, which are metallic at high temperatures, become insulating below ∼100 K due to the formation of a charge density wave (CDW). The physics of this transition is not conventional and involves a multiband Peierls instability with strong interband coupling. This CDW ground state is readily destroyed with femtosecond laser pulses resulting in a light-induced insulator-to-metal phase transition. The current understanding of this transition remains incomplete, requiring measurements of the transient electronic structure to complement previous investigations of the lattice dynamics. Time- and angle-resolved photoemission spectroscopy with extreme ultraviolet radiation is applied to this end. We find that the transition from the insulating to the metallic band structure occurs within ∼660 fs, which is a fraction of the amplitude mode period. The long lifetime of the transient state (>100 ps) is attributed to trapping in a metastable state in accordance with previous work.

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Language(s): eng - English
 Dates: 2018-04-192017-08-222018-05-032018-05-15
 Publication Status: Published in print
 Pages: -
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 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevB.97.201401
arXiv: 1803.05189
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Title: Phys. Rev. B
Source Genre: Journal
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Publ. Info: American Physical Society
Pages: - Volume / Issue: 97 (20) Sequence Number: 201401(R) Start / End Page: - Identifier: -