Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Kirchhof, Jan N"'
Autor:
Yücel, Oguzhan, Yagodkin, Denis, Kirchhof, Jan N., Kumar, Abhijeet, Dewambrechies, Adrian, Kovalchuk, Sviatoslav, Yu, Yufeng, Bolotin, Kirill I.
We explore strain-activated emission centers formed by atomic force microscopy (AFM) indentation in monolayer \ce{WSe2} on a flexible polymer substrate. In the indented areas, we observe sharp new photoluminescence (PL) peaks characterized by subline
Externí odkaz:
http://arxiv.org/abs/2402.11128
Autor:
Kumar, Abhijeet, Yagodkin, Denis, Rosati, Roberto, Bock, Douglas J, Schattauer, Christoph, Tobisch, Sarah, Hagel, Joakim, Höfer, Bianca, Kirchhof, Jan N, López, Pablo Hernández, Burfeindt, Kenneth, Heeg, Sebastian, Gahl, Cornelius, Libisch, Florian, Malic, Ermin, Bolotin, Kirill I
Momentum-indirect excitons composed of electrons and holes in different valleys define optoelectronic properties of many semiconductors, but are challenging to detect due to their weak coupling to light. The identification of an excitons' valley char
Externí odkaz:
http://arxiv.org/abs/2312.07332
Autor:
Yu, Yuefeng, Kirchhof, Jan N., Tsarapkin, Aleksei, Deinhart, Victor, Yucel, Oguzhan, Höfer, Bianca, Höflich, Katja, Bolotin, Kirill I.
Phononic crystals (PnCs) are artificially patterned media exhibiting bands of allowed and forbidden zones for phonons. Many emerging applications of PnCs from solid-state simulators to quantum memories could benefit from the on-demand tunability of t
Externí odkaz:
http://arxiv.org/abs/2305.09577
Autor:
Kirchhof, Jan N., Yu, Yuefeng, Yagodkin, Denis, Stetzuhn, Nele, de Araújo, Daniel B., Kanellopulos, Kostas, Manas-Valero, Samuel, Coronado, Eugenio, van der Zant, Herre, Reich, Stephanie, Schmid, Silvan, Bolotin, Kirill I.
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:
http://arxiv.org/abs/2301.12211
Autor:
López, Pablo Hernández, Heeg, Sebastian, Schattauer, Christoph, Kovalchuk, Sviatoslav, Kumar, Abhijeet, Bock, Douglas J., Kirchhof, Jan N., Hoefer, Bianca, Greben, Kyrylo, Libisch, Florian, Bolotin, Kirill I.
Mechanical strain is a powerful tuning knob for excitons, Coulomb-bound electron-hole complexes dominating optical properties of two-dimensional semiconductors. While the strain response of bright free excitons is broadly understood, the behavior of
Externí odkaz:
http://arxiv.org/abs/2207.11037
Autor:
Kirchhof, Jan N., Bolotin, Kirill I.
We present a tunable phononic crystal which undergoes a phase transition from mechanically insulating to mechanically transmissive (metallic). Specifically, in our simulations for a phononic lattice under biaxial tension ($\sigma_{xx} =\sigma_{yy}$ =
Externí odkaz:
http://arxiv.org/abs/2206.11774
Autor:
Kirchhof, Jan N., Yu, Yuefeng, Antheaume, Gabriel, Gordeev, Georgy, Yagodkin, Denis, Elliott, Peter, de Araújo, Daniel B., Sharma, Sangeeta, Reich, Stephanie, Bolotin, Kirill I.
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:
http://arxiv.org/abs/2203.07025
Autor:
Gueckstock, Oliver, Seeger, Rafael L., Seifert, Tom S., Auffret, Stephane, Gambarelli, Serge, Kirchhof, Jan N., Bolotin, Kirill I., Baltz, Vincent, Kampfrath, Tobias, Nádvorník, Lukáš
Publikováno v:
Appl. Phys. Lett. 120, 062408 (2022)
Control over spin transport in antiferromagnetic systems is essential for future spintronic applications with operational speeds extending to ultrafast time scales. Here, we study the transition from the gigahertz (GHz) to terahertz (THz) regime of s
Externí odkaz:
http://arxiv.org/abs/2111.04191
Publikováno v:
Nature Communications 13, 6601 (2022)
We demonstrate a new type of dual gate transistor to induce record electric fields through two-dimensional materials (2DMs). At the heart of this device is a 2DM suspended between two volumes of ionic liquid (IL) with independently controlled potenti
Externí odkaz:
http://arxiv.org/abs/2108.05797
Autor:
Kirchhof, Jan N., Weinel, Kristina, Heeg, Sebastian, Deinhart, Victor, Kovalchuk, Sviatoslav, Hoeflich, Katja, Bolotin, Kirill I.
In the field of phononics, periodic patterning controls vibrations and thereby the flow of heat and sound in matter. Bandgaps arising in such phononic crystals realize low-dissipation vibrational modes and enable applications towards mechanical qubit
Externí odkaz:
http://arxiv.org/abs/2011.14707