237 citations · 1.2k across the 35 of their papers we have counts for
37 papers
Molecular order induced charge transfer in a C-topological insulator moiré heterostructure
Ram Prakash Pandeya, Konstantin P. Shchukin, Yannic Falke +9
We synthesize and spectroscopically investigate monolayer C on the topological insulator (TI) BiTe. This C/BiTe heterostructure is characterized by ex…
Single in situ Interface Characterization Composed of Niobium and a Selectively Grown (BiSb)Te Topological Insulator Nanoribbon
Kevin Janßen, Philipp Rüßmann, Sergej Liberda +14
With increasing attention in Majorana physics for possible quantum bit applications, a large interest has been developed to understand the properties of the interface between a …
Induced Superconductivity in Hybrid Au/YBa2Cu3O7-x Electrodes on Vicinal Substrates
Irina I. Gundareva, Jose Martinez-Castro, F. Stefan Tautz +3
Superconducting electrodes are an integral part of hybrid Josephson junctions used in many applications including quantum technologies. We report on the fabrication and characteriz…
Aharonov-Bohm interference and phase-coherent surface-state transport in topological insulator rings
Gerrit Behner, Abdur Rehman Jalil, Dennis Heffels +9
We present low-temperature magnetotransport measurements on selectively-grown SbTe-based topological insulator ring structures. These topological insulator ring geometries…
Ballistic surface channels in fully in situ defined BiTe Josephson junctions with aluminum contacts
Daniel Rosenbach, Abdur R. Jalil, Tobias W. Schmitt +5
In this letter we report on the electrical transport properties of BiTe in a Josephson junction geometry using superconducting Al electrodes with a Ti interdiffusion barrie…
Supercurrent in BiTe Topological Material-Based Three-Terminal Junctions
Jonas Kölzer, Abdur Rehman Jalil, Daniel Rosenbach +6
In an in-situ prepared three-terminal Josephson junction based on the topological insulator BiTe and the superconductor Nb the transport properties are studied. The differe…
In-plane anisotropy of electrical transport in YTbBaCuO films
M. Lyatti, I. Kraiem, T. Röper +4
We fabricate high-quality c-axis oriented epitaxial YBaCuO films with 15% of yttrium atoms replaced by terbium (YTBCO) and study their electrical properties. The Tb…
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…
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…
Gate-induced decoupling of surface and bulk state properties in selectively-deposited BiTe nanoribbons
Daniel Rosenbach, Kristof Moors, Abdur R. Jalil +9
Three-dimensional topological insulators (TIs) host helical Dirac surface states at the interface with a trivial insulator. In quasi-one-dimensional TI nanoribbon structures the wa…
In-plane magnetic field-driven symmetry breaking in topological insulator-based three-terminal junctions
Jonas Kölzer, Kristof Moors, Abur R. Jalil +9
Topological surface states of three-dimensional topological insulator nanoribbons and their distinct magnetoconductance properties are promising for topoelectronic applications and…
Integration of topological insulator Josephson junctions in superconducting qubit circuits
Tobias W. Schmitt, Malcolm R. Connolly, Michael Schleenvoigt +16
The integration of semiconductor Josephson junctions (JJs) in superconducting quantum circuits provides a versatile platform for hybrid qubits and offers a powerful way to probe ex…
Quantum transport in topological surface states of BiTe nanoribbons
Daniel Rosenbach, Nico Oellers, Abdur Rehman Jalil +8
Quasi-1D nanowires of topological insulators are emerging candidate structures in superconductor hybrid architectures for the realization of Majorana fermion based quantum computat…
Probing embedded topological modes in bulk-like GeTe-SbTe heterostructures
Hisao Nakamura, Johannes Hofmann, Nobuki Inoue +5
The interface between topological and normal insulators hosts metallic states that appear due to the change in band topology. While these topological states at a surface, i.e., a t…
Thermally activated diffusion and lattice relaxation in (Si)GeSn materials
Nils von den Driesch, Stephan Wirths, Rene Troitsch +5
Germanium-Tin (GeSn) alloys have emerged as a promising material for future optoelectronics, energy harvesting and nanoelectronics owing to their direct bandgap and compatibility w…
Capacitance-voltage measurements of (BiSb)Te field effect device
Jimin Wang, Markus Schitko, Gregor Mussler +2
Capacitance-voltage () traces in n-type-(BiSb)Te/oxide/metal capacitor structures using an AC capacitance bridge are investigated. By tuning the t…
Phase-coherent loops in selectively-grown topological insulator nanoribbons
Jonas Kölzer, Daniel Rosenbach, Christian Weyrich +9
Universal conductance fluctuations and the weak antilocalization effect are defect structure specific fingerprints in the magnetoconductance that are caused by electron interferenc…
Long-lived non-equilibrium superconductivity in a non-centrosymmetric Rashba semiconductor
V. Narayan, P. C. Verpoort, J. R. A. Dann +8
We report non-equilibrium magnetodynamics in the Rashba-superconductor GeTe, which lacks inversion symmetry in the bulk. We find that at low temperature the system exhibits a non-e…
Thickness dependence of electron-electron interactions in topological p-n junctions
Dirk Backes, Danhong Huang, Rhodri Mansell +7
Electron-electron interactions in topological p-n junctions consisting of vertically stacked topological insulators are investigated. n-type Bi2Te3 and p-type Sb2Te3 of varying rel…
Observation of spin Nernst photocurrents in topological insulators
T. Schumann, N. Meyer, G. Mussler +7
The theoretical prediction of topological insulators in 2007 triggered tremendous interest. They are of fundamental interest because of their topological twist in k-space, which co…
Infrared/Terahertz Spectra of the Photogalvanic Effect in (Bi,Sb)Te based Three Dimensional Topological Insulators
H. Plank, J. Pernul, S. Gebert +9
We report on the systematic study of infrared/terahertz spectra of photocurrents in (Bi,Sb)Te based three dimensional topological insulators. We demonstrate that in a wide range of…
Boosting Transparency in Topological Josephson Junctions via Stencil Lithography
Peter Schüffelgen, Daniel Rosenbach, Chuan Li +14
Hybrid devices comprised of topological insulator (TI) nanostructures in proximity to s-wave superconductors (SC) are expected to pave the way towards topological quantum computati…
Influence of Te-doping on self-catalyzed VS InAs nanowires
Nicholas A. Güsken, Torsten Rieger, Gregor Mussler +2
We report on growth of Te-doped self-catalyzed InAs nanowires by molecular beam epitaxy on silicon (111) substrates. Changes in the wire morphology, i.e. a decrease in length and a…
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…