Zobrazeno 1 - 10
of 283
pro vyhledávání: '"Schliemann, J."'
Autor:
Stauber, T., Wackerl, M., Wenk, P., Margetis, D., González, J., Gómez-Santos, G., Schliemann, J.
Publikováno v:
Small Science 3, 2200080 (2023)
We discuss the full optical response of twisted bilayer graphene at the neutrality point close to the magic angle within the continuum model (CM). Firstly, we identify three different channels consistent with the underlying $D_3$ symmetry, yielding t
Externí odkaz:
http://arxiv.org/abs/2209.00958
Autor:
Akay, D., Schliemann, J.
We study the effect of circularly polarized electromagnetic radiation on optical polarons in monolayer \b{eta}-borophene. We focus on the off-resonant regime of large driving frequencies, which allows to set up an effectively time-independent Hamilto
Externí odkaz:
http://arxiv.org/abs/2207.11949
Publikováno v:
Phys. Rev. Lett. 118, 266801 (2017)
We have developed a Hartree-Fock theory for electrons on a honeycomb lattice aiming to solve a long-standing problem of the Fermi velocity renormalization in graphene. Our model employs no fitting parameters (like an unknown band cutoff) but relies o
Externí odkaz:
http://arxiv.org/abs/1704.03747
Publikováno v:
Sci. Rep. 6, 22672 (2016)
We introduce an effective tight-binding model to discuss penta-graphene and present an analytical solution. This model only involves the $\pi$-orbitals of the sp$^2$-hybridized carbon atoms and reproduces the two highest valence bands. By introducing
Externí odkaz:
http://arxiv.org/abs/1509.08651
Publikováno v:
Phys. Rev. B 91, 115407 (2015)
We discuss the optical conductivity of several non-interacting two-dimensional (2D) semiconducting systems focusing on gapped Dirac and Schr\"odinger fermions as well as on a system mixing these two types. Close to the band-gap, we can define a unive
Externí odkaz:
http://arxiv.org/abs/1412.5835
Autor:
Echtermeyer, T. J., Nene, P. S., Trushin, M., Gorbachev, R. V., Eiden, A. L., Milana, S., Sun, Z., Schliemann, J., Lidorikis, E., Novoselov, K. S., Ferrari, A. C.
Publikováno v:
Nano Lett. 14, 3733 (2014)
Graphene's high mobility and Fermi velocity, combined with its constant light absorption in the visible to far-infrared range, make it an ideal material to fabricate high-speed and ultra-broadband photodetectors. However, the precise mechanism of pho
Externí odkaz:
http://arxiv.org/abs/1402.1266
Publikováno v:
Eur. Phys. J. B. (2013) 86:366
We analyze the role of ac-driven Rashba spin-orbit coupling in monolayer graphene including a spin-dependent mass term. Using the Magnus expansion as a semi-analytical approximation scheme a full account of the quasienergie spectrum of spin states is
Externí odkaz:
http://arxiv.org/abs/1305.3140
Publikováno v:
Phys. Rev. B 85, 205428 (2012)
We study the role of periodically driven time-dependent Rashba spin-orbit coupling (RSOC) on a monolayer graphene sample. After recasting the originally $4\times 4$ system of dynamical equations as two time-reversal related two-level problems, the qu
Externí odkaz:
http://arxiv.org/abs/1204.0404
Autor:
Sun, Z. Z., Schliemann, J.
Publikováno v:
Chin. Phys. B 27, 067501 (2018)
We investigate magnetization reversal of two-body uniaxial Stoner particles, by injecting spin-polarized current through a spin-valve structure. The two-body Stoner particles perform synchronized dynamics and can act as an information bit in computer
Externí odkaz:
http://arxiv.org/abs/1106.3454
Autor:
Erbe, B., Schliemann, J.
Publikováno v:
Phys. Rev. Lett. 105, 177602 (2010)
We investigate the relation between integrability and decoherence in central spin models with more than one central spin. We show that there is a transition between integrability ensured by the Bethe ansatz and integrability ensured by complete sets
Externí odkaz:
http://arxiv.org/abs/1006.4983