Zobrazeno 1 - 10
of 229
pro vyhledávání: '"Libisch, Florian"'
Autor:
Dolleman, Robin J., Rothstein, Alexander, Fischer, Ammon, Klebl, Lennart, Waldecker, Lutz, Watanabe, Kenji, Taniguchi, Takashi, Kennes, Dante M., Libisch, Florian, Beschoten, Bernd, Stampfer, Christoph
We report on the observation of negative electronic compressibility in twisted bilayer graphene for Fermi energies close to insulating states. To observe this negative compressibility, we take advantage of naturally occurring twist angle domains that
Externí odkaz:
http://arxiv.org/abs/2403.17840
Autor:
Rothstein, Alexander, Schattauer, Christoph, Dolleman, Robin J., Trellenkamp, Stefan, Lentz, Florian, Watanabe, Kenji, Taniguchi, Takashi, Kennes, Dante M., Beschoten, Bernd, Stampfer, Christoph, Libisch, Florian
Publikováno v:
Phys. Rev. B 109, 155139 (2024)
We report on the investigation of periodic superstructures in twisted bilayer graphene (tBLG) van-der-Waals heterostructures, where one of the graphene layers is aligned to hexagonal boron nitride (hBN). Our theoretical simulations reveal that if the
Externí odkaz:
http://arxiv.org/abs/2403.14393
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:
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
Publikováno v:
Phys. Rev. B 106, 165412 (2022)
The moir\'e potential of graphene on hexagonal boron nitride (hBN) generates a supercell sufficiently large as to thread a full magnetic flux quantum $\Phi_0$ for experimentally accessible magnetic field strengths. Close to rational fractions of $\Ph
Externí odkaz:
http://arxiv.org/abs/2111.01755
Publikováno v:
J. Chem. Phys. 154, 011101 (2021)
We present an embedding approach to treat local electron correlation effects in periodic environments. In a single, consistent framework, our plane-wave based scheme embeds a local high-level correlation calculation (here Coupled Cluster Theory, CC),
Externí odkaz:
http://arxiv.org/abs/2012.06165
Autor:
Banszerus, Luca, Libisch, Florian, Ceruti, Andrea, Blien, Stefan, Watanabe, Kenji, Taniguchi, Takashi, Hüttel, Andreas K., Beschoten, Bernd, Hassler, Fabian, Stampfer, Christoph
A finite-size normal conductor, proximity-coupled to a superconductor has been predicted to exhibit a so-called minigap, in which quasiparticle excitations are prohibited. Here, we report on the direct observation of such a minigap in ballistic graph
Externí odkaz:
http://arxiv.org/abs/2011.11471
Publikováno v:
Phys. Rev. B 104, 035139 (2021)
We construct a continuum model of twisted trilayer graphene using {\it ab initio} density-functional-theory calculations, and apply it to address twisted trilayer electronic structure. Our model accounts for moir\'e variation in site energies, hoppin
Externí odkaz:
http://arxiv.org/abs/2010.05787
We calculate the time evolution of the transient reflection signal in an MoS$_2$ monolayer on a SiO$_2$/Si substrate using first-principles out-of-equilibrium real-time methods. Our simulations provide a simple and intuitive physical picture for the
Externí odkaz:
http://arxiv.org/abs/2010.02758
Autor:
Quan, Jiamin, Linhart, Lukas, Lin, Miao-Ling, Lee, Daehun, Zhu, Jihang, Wang, Chun-Yuan, Hsu, Wei-Ting, Choi, Junho, Embley, Jacob, Young, Carter, Taniguchi, Takashi, Watanabe, Kenji, Shih, Chih-Kang, Lai, Keji, MacDonald, Allan H., Tan, Ping-Heng, Libisch, Florian, Li, Xiaoqin
In moir\'e crystals formed by stacking van der Waals (vdW) materials, surprisingly diverse correlated electronic phases and optical properties can be realized by a subtle change in the twist angle. Here, we discover that phonon spectra are also renor
Externí odkaz:
http://arxiv.org/abs/2009.10650