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Akademický článek

Energy dissipation from a correlated system driven out of equilibrium

Autor: J. D. Rameau, S. Freutel, A. F. Kemper, M. A. Sentef, J. K. Freericks, I. Avigo, M. Ligges, L. Rettig, Y. Yoshida, H. Eisaki, J. Schneeloch, R. D. Zhong, Z. J. Xu, G. D. Gu, P. D. Johnson, U. Bovensiepen

Publikováno v: Nature Communications, Vol 7, Iss 1, Pp 1-9 (2016)

Differentiation of quantum interactions in correlated materials is ambiguous in measurements of the single particle self-energy. Here, Rameau et al. employ a combined theoretical and experimental time domain treatment to separate electron-boson inter

Externí odkaz: https://doaj.org/article/e22c35742c724c8590043d4166ddd150

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Akademický článek

Decelerated lattice excitation and absence of bulk phonon modes at surfaces: Ultra-fast electron diffraction from Bi(111) surface upon fs-laser excitation

Autor: V. Tinnemann, C. Streubühr, B. Hafke, T. Witte, A. Kalus, A. Hanisch-Blicharski, M. Ligges, P. Zhou, D. von der Linde, U. Bovensiepen, M. Horn-von Hoegen

Publikováno v: Structural Dynamics, Vol 6, Iss 6, Pp 065101-065101-5 (2019)

Ultrafast reflection high-energy electron diffraction is employed to follow the lattice excitation of a Bi(111) surface upon irradiation with a femtosecond laser pulse. The thermal motion of the atoms is analyzed through the Debye–Waller effect. Wh

Externí odkaz: https://doaj.org/article/8817398fa60a494b9c0b8b6aa128cc07

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Akademický článek

Ultrafast electron diffraction from a Bi(111) surface: Impulsive lattice excitation and Debye–Waller analysis at large momentum transfer

Autor: V. Tinnemann, C. Streubühr, B. Hafke, A. Kalus, A. Hanisch-Blicharski, M. Ligges, P. Zhou, D. von der Linde, U. Bovensiepen, M. Horn-von Hoegen

Publikováno v: Structural Dynamics, Vol 6, Iss 3, Pp 035101-035101-9 (2019)

The lattice response of a Bi(111) surface upon impulsive femtosecond laser excitation is studied with time-resolved reflection high-energy electron diffraction. We employ a Debye–Waller analysis at large momentum transfer of 9.3 Å−1 ≤ Δ k ≤

Externí odkaz: https://doaj.org/article/ba790007fdf94476a73c45b5be73b31b

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Akademický článek

Doublon bottleneck in the ultrafast relaxation dynamics of hot electrons in 1T-TaS_{2}

Autor: I. Avigo, F. Queisser, P. Zhou, M. Ligges, K. Rossnagel, R. Schützhold, U. Bovensiepen

Publikováno v: Physical Review Research, Vol 2, Iss 2, p 022046 (2020)

Employing time-resolved photoelectron spectroscopy we analyze the relaxation dynamics of hot electrons in the charge density wave/Mott material 1T-TaS_{2}. At 1.2 eV above the Fermi level we observe a hot electron lifetime of 12±5 fs in the metallic

Externí odkaz: https://doaj.org/article/1b19dd85b067468c80da19a2012ce97f

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Akademický článek

Electron-lattice energy relaxation in laser-excited thin-film Au-insulator heterostructures studied by ultrafast MeV electron diffraction

Autor: K. Sokolowski-Tinten, X. Shen, Q. Zheng, T. Chase, R. Coffee, M. Jerman, R. K. Li, M. Ligges, I. Makasyuk, M. Mo, A. H. Reid, B. Rethfeld, T. Vecchione, S. P. Weathersby, H. A. Dürr, X. J. Wang

Publikováno v: Structural Dynamics, Vol 4, Iss 5, Pp 054501-054501-8 (2017)

We apply time-resolved MeV electron diffraction to study the electron-lattice energy relaxation in thin film Au-insulator heterostructures. Through precise measurements of the transient Debye-Waller-factor, the mean-square atomic displacement is dire

Externí odkaz: https://doaj.org/article/3c832d2e2b7f4b689b53b62132575bdc

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High-Q Photonic Crystal Resonator with Large Hole for Microfluidic Integration for Biosensing

Autor: Jan C. Balzer, Yixiong Zhao, M. Ligges, G. vom Bogel, J. Buchholz, Karsten Seidl

In this work, we demonstrate a photonic crystal (PC) resonator with a large hole in the center for biosensing in the terahertz (THz) regime. The design has the potential to be integrated with a microfluidic channel for automated pathogen detection. T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cec74a91d0be6fba4a9a6fac2cc61863
https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&origin=inward&scp=85125302515

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Akademický článek

Doping dependence and electron–boson coupling in the ultrafast relaxation of hot electron populations in Ba(Fe1–xCox)2As2

Autor: I Avigo, S Thirupathaiah, M Ligges, T Wolf, J Fink, U Bovensiepen

Publikováno v: New Journal of Physics, Vol 18, Iss 9, p 093028 (2016)

Using femtosecond time- and angle-resolved photoemission spectroscopy we investigate the effect of electron doping on the electron dynamics in $\mathrm{Ba}{({\mathrm{Fe}}_{1-x}{\mathrm{Co}}_{x})}_{2}{\mathrm{As}}_{2}$ in a range of $0\leqslant x\lt 0

Externí odkaz: https://doaj.org/article/be43053a26a241d59916230f55ef3668

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Akademický článek

Thickness-dependent electron–lattice equilibration in laser-excited thin bismuth films

Publikováno v: New Journal of Physics, Vol 17, Iss 11, p 113047 (2015)

Electron–phonon coupling processes determine electronic transport properties of materials and are responsible for the transfer of electronic excess energy to the lattice. With decreasing device dimensions an understanding of these processes in nano

Externí odkaz: https://doaj.org/article/0b110471d09448478ef653fdf40ff992

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