Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Jan N Kirchhof"'
Autor:
Abhijeet M. Kumar, Denis Yagodkin, Roberto Rosati, Douglas J. Bock, Christoph Schattauer, Sarah Tobisch, Joakim Hagel, Bianca Höfer, Jan N. Kirchhof, Pablo Hernández López, Kenneth Burfeindt, Sebastian Heeg, Cornelius Gahl, Florian Libisch, Ermin Malic, Kirill I. Bolotin
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-8 (2024)
Abstract Intervalley excitons with electron and hole wavefunctions residing in different valleys determine the long-range transport and dynamics observed in many semiconductors. However, these excitons with vanishing oscillator strength do not direct
Externí odkaz:
https://doaj.org/article/8bdb511c5a7748e3bcc5df43a7866d52
Autor:
Jan N. Kirchhof, Kirill I. Bolotin
Publikováno v:
npj 2D Materials and Applications, Vol 8, Iss 1, Pp 1-1 (2024)
Externí odkaz:
https://doaj.org/article/3f0a75b7e35e4739a2d399e44175a2c6
Autor:
Jan N. Kirchhof, Kirill I. Bolotin
Publikováno v:
npj 2D Materials and Applications, Vol 7, Iss 1, Pp 1-7 (2023)
Abstract We present a tunable phononic crystal which can be switched from a mechanically insulating to a mechanically conductive (transmissive) state. Specifically, in our simulations for a phononic lattice under biaxial tension (σ xx = σ yy = 0.01
Externí odkaz:
https://doaj.org/article/8dff95262f304866b949faf72cc0d45b
Autor:
Pablo Hernández López, Sebastian Heeg, Christoph Schattauer, Sviatoslav Kovalchuk, Abhijeet Kumar, Douglas J. Bock, Jan N. Kirchhof, Bianca Höfer, Kyrylo Greben, Denis Yagodkin, Lukas Linhart, Florian Libisch, Kirill I. Bolotin
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-9 (2022)
Mechanical strain is a powerful tuning knob for excitons in two-dimensional semiconductors. Here, the authors find that under the application of strain, dark and localized excitons in monolayer WSe2 are brought into energetic resonance, forming a new
Externí odkaz:
https://doaj.org/article/e0d2854796d04ac8829185d361ea9b87
Autor:
Benjamin I. Weintrub, Yu-Ling Hsieh, Sviatoslav Kovalchuk, Jan N. Kirchhof, Kyrylo Greben, Kirill I. Bolotin
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-6 (2022)
The application of electric fields >1 V/nm in solid state devices could provide access to unexplored phenomena, but it is currently difficult to implement. Here, the authors develop a double-sided ionic liquid gating technique to generate electric fi
Externí odkaz:
https://doaj.org/article/ff671dd51c724785b49519c043bb5261
Autor:
Victor Deinhart, Lisa-Marie Kern, Jan N. Kirchhof, Sabrina Juergensen, Joris Sturm, Enno Krauss, Thorsten Feichtner, Sviatoslav Kovalchuk, Michael Schneider, Dieter Engel, Bastian Pfau, Bert Hecht, Kirill I. Bolotin, Stephanie Reich, Katja Höflich
Publikováno v:
Beilstein Journal of Nanotechnology, Vol 12, Iss 1, Pp 304-318 (2021)
Focused beams of helium ions are a powerful tool for high-fidelity machining with spatial precision below 5 nm. Achieving such a high patterning precision over large areas and for different materials in a reproducible manner, however, is not trivial.
Externí odkaz:
https://doaj.org/article/453fcdf5c0624203b0db4315c367c47e
Autor:
Jan N Kirchhof, Yuefeng Yu, Denis Yagodkin, Nele Stetzuhn, Daniel B de Araújo, Kostas Kanellopulos, Samuel Manas-Valero, Eugenio Coronado, Herre van der Zant, Stephanie Reich, Silvan Schmid, Kirill I Bolotin
Publikováno v:
2D Materials, 10(3)
Nanomechanical spectroscopy (NMS) is a recently developed approach to determine optical absorption spectra of nanoscale materials via mechanical measurements. It is based on measuring changes in the resonance frequency of a membrane resonator vs. the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6646aab6ea4fbeb571d8029101f1b472
https://doi.org/10.1088/2053-1583/acd0bf
https://doi.org/10.1088/2053-1583/acd0bf
Publikováno v:
Nature Photonics
We investigate the transport of excitons and trions in monolayer semiconductor WS$_2$ subjected to controlled non-uniform mechanical strain. We actively control and tune the strain profiles with an AFM-based setup in which the monolayer is indented b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce56d435f0adc204e4fafade63e16199
https://doi.org/10.1038/s41566-019-0581-5
https://doi.org/10.1038/s41566-019-0581-5
Autor:
Jan N. Kirchhof, Yuefeng Yu, Gabriel Antheaume, Georgy Gordeev, Denis Yagodkin, Peter Elliott, Daniel B. de Araújo, Sangeeta Sharma, Stephanie Reich, Kirill I. Bolotin
We introduce a nanomechanical platform for fast and sensitive measurements of the spectrally-resolved optical dielectric function of 2D materials. At the heart of our approach is a suspended 2D material integrated into a nanomechanical resonator illu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5918d12aa1ab479c36dbbd034d54488
https://refubium.fu-berlin.de/handle/fub188/38045
https://refubium.fu-berlin.de/handle/fub188/38045
Autor:
Benjamin I. Weintrub, Yu-Ling Hsieh, Sviatoslav Kovalchuk, Jan N. Kirchhof, Kyrylo Greben, Kirill I. Bolotin
The application of an electric field through two-dimensional materials (2DMs) modifies their properties. For example, a bandgap opens in semimetallic bilayer graphene while the bandgap shrinks in few-layer 2D semiconductors. The maximum electric fiel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2147b92a8f4e81a4d69ad6804e19d3be
http://arxiv.org/abs/2108.05797
http://arxiv.org/abs/2108.05797