Zobrazeno 1 - 10
of 1 618
pro vyhledávání: '"Knupfer M"'
Autor:
Schultz, J., Lubk, A., Jerzembeck, F., Kikugawa, N., Knupfer, M., Wolf, D., Büchner, B., Fink, J.
We use momentum-dependent electron energy-loss spectroscopy in transmission to study collective charge excitations in the layer metal Sr$_2$RuO$_4$. This metal has a transition from a perfect Fermi liquid below $T\approx30\,$K into a "strange" metal
Externí odkaz:
http://arxiv.org/abs/2401.05880
Autor:
Maksimchuk, P.O., Hubenko, K.O., Knupfer, M., Seminko, V.V., Klochkov, V.K., Sorokin, O.V., Demchenko, L.D., Yefimova, S.L.
Publikováno v:
In Journal of Molecular Liquids 15 April 2024 400
Autor:
Koitzsch, A., Habenicht, C., Mueller, E., Knupfer, M., Buechner, B., Kretschmer, S., Richter, M., Brink, J. van den, Boerrnert, F., Nowak, D., Isaeva, A., Doert, Th.
Publikováno v:
Phys. Rev. Materials 1, 052001(R) (2017)
A quantum spin-liquid might be realized in $\alpha$-RuCl$_{3}$, a honeycomb-lattice magnetic material with substantial spin-orbit coupling. Moreover, $\alpha$-RuCl$_{3}$ is a Mott insulator, which implies the possibility that novel exotic phases occu
Externí odkaz:
http://arxiv.org/abs/1709.05176
Publikováno v:
Phys. Rev. B 97, 041201 (2018)
We combine electron energy-loss spectroscopy and first-principles calculations based on density-functional theory (DFT) to identify the lowest indirect exciton state in the in-plane charge response of hexagonal boron nitride (h-BN) single crystals. T
Externí odkaz:
http://arxiv.org/abs/1706.04806
We present electron energy-loss spectroscopic measurements of potassium (K) intercalated tungsten diselenide (WSe2). After exposure of pristine WSe2 films to potassium, we observe a charge carrier plasmon excitation at about 0.97 eV, which indicates
Externí odkaz:
http://arxiv.org/abs/1701.06293
Publikováno v:
Phys. Rev. B 94, 085201 (2016)
We combine electron energy-loss spectroscopy (EELS) and density functional theory (DFT) calculations to study the dispersion and effective mass of excitons in the bulk of WSe$_2$. Our EELS data suggest substantial deviations from the generic quadrati
Externí odkaz:
http://arxiv.org/abs/1604.01895
Autor:
Koitzsch, A., Habenicht, C., Mueller, E., Knupfer, M., Buechner, B., Kandpal, H., Brink, J. van den, Nowak, D., Isaeva, A., Doert, Th.
Publikováno v:
Phys. Rev. Lett. 117, 126403 (2016)
Novel ground states might be realized in honeycomb lattices with strong spin-orbit coupling. Here we study the electronic structure of ${\alpha}$-RuCl$_3$, in which the Ru ions are in a d5 configuration and form a honeycomb lattice, by angle-resolved
Externí odkaz:
http://arxiv.org/abs/1603.05507
Autor:
Heming, N., Treske, U., Knupfer, M., Büchner, B., Inosov, D. S., Shitsevalova, N. Y., Filipov, V. B., Krause, S., Koitzsch, A.
Publikováno v:
Phys. Rev. B 90, (2014), 195128
We have investigated the properties of cleaved SmB$_6$ single crystals by x-ray photoelectron spectroscopy. At low temperatures and freshly cleaved samples a surface core level shift is observed which vanishes when the temperature is increased. A Sm
Externí odkaz:
http://arxiv.org/abs/1503.02813
We report about the energy and momentum resolved optical response of black phosphorus (BP) in its bulk form. Along the armchair direction of the puckered layers we find a highly dispersive mode that is trongly suppressed in the perpendicular (zig-zag
Externí odkaz:
http://arxiv.org/abs/1503.02549
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