50 citations · 207 across the 14 of their papers we have counts for
14 papers
A miniature evaporator for in-operando deposition of isolated atoms in a low-temperature scanning tunneling microscope
Jeongmin Oh, Hermann Osterhage, Vasily Cherepanov +5
Depositing dilute atomic ensembles onto cold samples is challenging in low-temperature scanning tunneling microscopes (STM) because radiation shields and restricted internal geomet…
Imaging the transition from diffusive to Landauer resistivity dipoles
Serhii Kovalchuk, David Kämpfer, Jonathan K. Hofmann +6
A point-like defect in a uniform current-carrying conductor induces a dipole in the electrochemical potential, which counteracts the original transport field. If the mean free path…
Probing edge state conductance in ultra-thin topological insulator films
Arthur Leis, Michael Schleenvoigt, Kristof Moors +8
Quantum spin Hall (QSH) insulators have unique electronic properties, comprising a band gap in their two-dimensional interior and one-dimensional spin-polarized edge states in whic…
Nanoscale tip positioning with a multi-tip scanning tunneling microscope using topography images
A. Leis, V. Cherepanov, B. Voigtländer +1
Multi-tip scanning tunneling microscopy (STM) is a powerful method to perform charge transport measurements at the nanoscale. With four STM tips positioned on the surface of a samp…
Lifting the spin-momentum locking in ultra-thin topological insulator films
Arthur Leis, Michael Schleenvoigt, Vasily Cherepanov +6
Three-dimensional (3D) topological insulators (TIs) are known to carry 2D Dirac-like topological surface states in which spin-momentum locking prohibits backscattering. When thinne…
A millikelvin scanning tunneling microscope in ultra-high vacuum with adiabatic demagnetization refrigeration
Taner Esat, Peter Borgens, Xiaosheng Yang +5
We present the design and performance of an ultra-high vacuum (UHV) scanning tunneling microscope (STM) that uses adiabatic demagnetization of electron magnetic moments for control…
Parasitic conduction channels in topological insulator thin films
Sven Just, Felix Lüpke, Vasily Cherepanov +2
Thin films of topological insulators (TI) usually exhibit multiple parallel conduction channels for the transport of electrical current. Beside the topologically protected surface…
Surface structures of tellurium on Si(111)-(7x7) studied by low-energy electron diffraction and scanning tunneling microscopy
Felix Lüpke, Jiří Doležal, Vasily Cherepanov +3
The Te-covered Si(111) surface has received recent interest as a template for the epitaxy of van der Waals (vdW) materials, e.g. BiTe. Here, we report the formation of a Te…
Low Vibration Laboratory with a Single-Stage Vibration Isolation for Microscopy Applications
Bert Voigtländer, Peter Coenen, Vasily Cherepanov +3
The construction and the vibrational performance of a low vibration laboratory for microscopy applications comprising a 100 ton floating foundation supported by passive pneumatic i…
Four-point probe measurements using current probes with voltage feedback to measure electric potentials
F. Lüpke, D. Cuma, S. Korte +2
We present a four-point probe resistance measurement technique which uses four equivalent current measuring units, resulting in minimal hardware requirements and corresponding sour…
Electrical resistance of individual defects at a topological insulator surface
Felix Lüpke, Markus Eschbach, Tristan Heider +10
Three-dimensional topological insulators host surface states with linear dispersion, which manifest as a Dirac cone. Nanoscale transport measurements provide direct access to the t…
Surface Conductivity of Si(100) and Ge(100) Surfaces Determined from Four-Point Transport Measurements Using an Analytical N-Layer Conductance Model
Sven Just, Helmut Soltner, Stefan Korte +2
An analytical N-layer model for charge transport close to a surface is derived from the solution of Poisson's equation and used to describe distance-dependent electrical four-point…
Scanning tunneling potentiometry implemented into a multi-tip setup by software
F. Lüpke, S. Korte, V. Cherepanov +1
We present a multi-tip scanning tunneling potentiometry technique that can be implemented into existing multi-tip scanning tunneling microscopes without hardware changes. The resul…
Surface and Step Conductivities on Si(111) Surfaces
Sven Just, Marcus Blab, Stefan Korte +3
Four-point measurements using a multi-tip scanning tunneling microscope (STM) are carried out in order to determine surface and step conductivities on Si(111) surfaces. In a first…