Publications (13)
Spin Mapping of Surface and Bulk Rashba States in Ferroelectric a-GeTe(111) Films
H. J. Elmers, R. Wallauer, M. Liebmann +16
A comprehensive mapping of the spin polarization of the electronic bands in ferroelectric a-GeTe(111) films has been performed using a time-of-flight momentum microscope equipped w…
Scanning tunneling spectroscopy of a dilute two-dimensional electron system exhibiting Rashba spin splitting
S. Becker, M. Liebmann, T. Mashoff +2
Using scanning tunneling spectroscopy (STS) at 5 K in B-fields up to 7 T, we investigate the local density of states of a two-dimensional electron system (2DES) created by Cs adsor…
Mn-rich MnSb2Te4: A topological insulator with magnetic gap closing at high Curie temperatures of 45-50 K
S. Wimmer, J. Sánchez-Barriga, P. Küppers +18
Ferromagnetic topological insulators exhibit the quantum anomalous Hall effect that might be used for high precision metrology and edge channel spintronics. In conjunction with sup…
Apparent rippling with honeycomb symmetry and tunable periodicity observed by scanning tunneling microscopy on suspended graphene
A. Georgi, P. Nemes-Incze, B. Szafranek +4
Suspended graphene is difficult to image by scanning probe microscopy due to the inherent van-der-Waals and dielectric forces exerted by the tip which are not counteracted by a sub…
Electrical transport and low-temperature scanning tunneling microscopy of microsoldered graphene
V. Geringer, D. Subramaniam, A. K. Michel +7
Using the recently developed technique of microsoldering, we perform a systematic transport study of the influence of PMMA on graphene flakes revealing a doping effect of up to 3.8…
Probing electron-electron interaction in quantum Hall systems with scanning tunneling spectroscopy
S. Becker, C. Karrasch, T. Mashoff +4
Using low-temperature scanning tunneling spectroscopy applied to the Cs-induced two-dimensional electron system (2DES) on p-type InSb(110), we probe electron-electron interaction e…
Wave function mapping in graphene quantum dots with soft confinement
D. Subramaniam, F. Libisch, Y. Li +11
Using low-temperature scanning tunneling spectroscopy, we map the local density of states (LDOS) of graphene quantum dots supported on Ir(111). Due to a band gap in the projected I…
Intrinsic and extrinsic corrugation of monolayer graphene deposited on SiO2
V. Geringer, M. Liebmann, T. Echtermeyer +5
Using scanning tunneling microscopy (STM) in ultra high vacuum and atomic force microscopy, we investigate the corrugation of graphene flakes deposited by exfoliation on a Si/SiO2…
Probing the nodal structure of Landau level wave functions in real space
J. R. Bindel, J. Ulrich, M. Liebmann +1
The inversion layer of p-InSb(110) obtained by Cs adsorption of 1.8 % of a monolayer is used to probe the Landau level wave functions within smooth potential valleys by scanning tu…
Spin properties of 2D semiconductors probed by scanning tunneling microscopy
M. Morgenstern, A. Georgi, C. StraÃer +3
The interrelation between spin and charge in semiconductors leads to interesting effects, e.g., the Rashba-type spin-orbit splitting or the exchange enhancement. These properties a…
Exploring the subsurface atomic structure of the epitaxially grown phase change material GeSbTe
J. Kellner, G. Bihlmayer, V. L. Deringer +7
Scanning tunneling microscopy (STM) and spectroscopy (STS) in combination with density functional theory (DFT) calculations are employed to study the surface and subsurface propert…
Probing two topological surface bands of Sb2Te3 by spin-polarized photoemission spectroscopy
C. Pauly, G. Bihlmayer, M. Liebmann +9
Using high resolution spin- and angle-resolved photoemission spectroscopy, we map the electronic structure and spin texture of the surface states of the topological insulator Sb2Te…
Bistability and oscillatory motion of natural nano-membranes appearing within monolayer graphene on silicon dioxide
T. Mashoff, M. Pratzer, V. Geringer +4
The recently found material graphene is a truly two-dimensional crystal and exhibits, in addition, an extreme mechanical strength. This in combination with the high electron mobili…