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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/21.11116/0000-0001-458E-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-CF49-0
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, Author              
Krause, R.1, 2, Author              
Aeschlimann, S.1, 2, Author              
Gierz, I.1, 2, Author              
Affiliations:
1Ultrafast Electron Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938295              
2Center 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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 Dates: 2018-04-192017-08-222018-05-032018-05-15
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevB.97.201401
arXiv: 1803.05189
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Project name : We thank H. Bromberger for technical support and A. Cavalleri for careful reading of the manuscript and many valuable comments. This work received financial support from the German Science Foundation via the SFB 925 “Light induced dynamics and control of correlated quantum systems”.
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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: -