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Journal Article

Band structure dynamics in indium wires

MPS-Authors
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Chavez Cervantes,  M.
Ultrafast Electron Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free Electron Laser Science;

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Krause,  R.
Ultrafast Electron Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free Electron Laser Science;

/persons/resource/persons180731

Aeschlimann,  S.
Ultrafast Electron Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free Electron Laser Science;

/persons/resource/persons133795

Gierz,  I.
Ultrafast Electron Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free Electron Laser Science;

External Resource
Fulltext (public)

PhysRevB.97.201401.pdf
(Publisher version), 4MB

Supplementary Material (public)

SupMat_ChavezCervantes_resubmission2.pdf
(Supplementary material), 3MB

Citation

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.


Cite as: http://hdl.handle.net/21.11116/0000-0001-458E-2
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.