106 citations · 952 across the 23 of their papers we have counts for
23 papers
Self-Consistent Model for Gate Control of Narrow-, Broken-, and Inverted-Gap (Topological) Heterostructures
Maximilian Hofer, Christopher Fuchs, Moritz Siebert +8
Even small electrostatic potentials can dramatically influence the band structure of narrow-, broken-, and inverted-gap materials. A quantitative understanding often necessitates a…
Zero external magnetic field quantum standard of resistance at the 10-9 level
D. K. Patel, K. M. Fijalkowski, M. Kruskopf +10
The quantum anomalous Hall effect holds promise as a disruptive innovation in condensed matter physics and metrology, as it gives access to Hall resistance quantization in terms of…
Balanced Quantum Hall Resistor
Kajetan M. Fijalkowski, Nan Liu, Martin Klement +4
The quantum anomalous Hall effect in magnetic topological insulators has been recognized as a promising platform for applications in quantum metrology. The primary reason for this…
Molecular Beam Epitaxy of a Half-Heusler Topological Superconductor Candidate YPtBi
Jiwoong Kim, Kajetan M. Fijalkowski, Johannes Kleinlein +6
The search for topological superconductivity has motivated investigations into materials that combine topological and superconducting properties. The half-Heusler compound YPtBi ap…
Milliwatt terahertz harmonic generation from topological insulator metamaterials
Klaas-Jan Tielrooij, Alessandro Principi, David Saleta Reig +16
Achieving efficient, high-power harmonic generation in the terahertz spectral domain has technological applications, for example in sixth generation (6G) communication networks. Ma…
Quantum transport and mobility spectrum of topological carriers in (001) SnTe/PbTe heterojunctions
D. Śnieżek, Jarosław Wróbel, M. Kojdecki +6
Measurements of magnetotransport in SnTe/PbTe heterojunctions grown by the MBE technique on (001) undoped CdTe substrates were performed. At low magnetic fields, quantum correction…
Macroscopic Quantum Tunneling of a Topological Ferromagnet
Kajetan M. Fijalkowski, Nan Liu, Pankaj Mandal +4
The recent advent of topological states of matter spawned many significant discoveries. The quantum anomalous Hall effect[1-3] is a prime example due to its potential for applicati…
Antiferromagnetic order in MnBi2Te4 films grown on Si(111) by molecular beam epitaxy
N. Liu, S. Schreyeck, K. M. Fijalkowski +4
MnBi2Te4 has recently been predicted and shown to be a magnetic topological insulator with intrinsic antiferromagnetic order. However, it remains a challenge to grow stoichiometric…
Quantum anomalous Hall edge channels survive up to the Curie temperature
Kajetan M. Fijalkowski, Nan Liu, Pankaj Mandal +4
Achieving metrological precision of quantum anomalous Hall resistance quantization at zero magnetic field so far remains limited to temperatures of the order of 20 mK, while the Cu…
Any Axion Insulator Must be a Bulk Three-Dimensional Topological Insulator
K. M. Fijalkowski, N. Liu, M. Hartl +11
In recent attempts to observe axion electrodynamics, much effort has focused on trilayer heterostructures of magnetic topological insulators, and in particular on the examination o…
Ubiquitous impact of localised impurity states on the exchange coupling mechanism in magnetic topological insulators
Thiago R. F. Peixoto, Hendrik Bentmann, Philipp Rüßmann +27
Since the discovery of the quantum anomalous Hall effect in the magnetically doped topological insulators (MTI) Cr:(Bi,Sb)Te and V:(Bi,Sb)Te, the search for the exc…
Coexistence of surface and bulk ferromagnetism mimics skyrmion Hall effect in a topological insulator
Kajetan M. Fijalkowski, Matthias Hartl, Martin Winnerlein +5
Here we report the investigation of the anomalous Hall effect in the magnetically doped topological insulator (V,Bi,Sb)2Te3. We find it contains two contributions of opposite sign.…
Breaking crystalline symmetry of epitaxial SnTe films by strain
Steffen Schreyeck, Karl Brunner, Laurens W. Molenkamp +7
SnTe belongs to the recently discovered class of topological crystalline insulators. Here we study the formation of line defects which break crystalline symmetry by strain in thin…
Zero-field quantum anomalous Hall metrology as a step towards a universal quantum standard unit system
Martin Goetz, Kajetan M. Fijalkowski, Eckart Pesel +9
In the quantum anomalous Hall effect, the edge states of a ferromagnetically doped topological insulator exhibit quantized Hall resistance and dissipationless transport at zero mag…
Scaling of the Quantum Anomalous Hall Effect as an Indicator of Axion Electrodynamics
S. Grauer, K. M. Fijalkowski, S. Schreyeck +5
We report on the scaling behavior of V-doped (Bi,Sb)Te samples in the quantum anomalous Hall regime for samples of various thickness. While previous quantum anomalous Hall…
Epitaxy and Structural Properties of (V,Bi,Sb)Te Layers Exhibiting the Quantum Anomalous Hall Effect
M. Winnerlein, S. Schreyeck, S. Grauer +5
The influence of Sb content, substrate type and cap layers on the quantum anomalous Hall effect observed in V-doped (Bi,Sb)Te magnetic topological insulators is investigate…
Anisotropic and strong negative magneto-resistance in the three-dimensional topological insulator Bi2Se3
S. Wiedmann, A. Jost, B. Fauque +10
We report on high-field angle-dependent magneto-transport measurements on epitaxial thin films of Bi2Se3, a three-dimensional topological insulator. At low temperature, we observe…
Impurity states in the magnetic topological insulator V:(Bi,Sb)Te
Thiago R. F. Peixoto, Hendrik Bentmann, Steffen Schreyeck +12
The ferromagnetic topological insulator V:(Bi,Sb)Te has been recently reported as a quantum anomalous Hall (QAH) system. Yet the microscopic origins of the QAH effect and t…
Kinetic limitation of chemical ordering in BiTeSe layers grown by molecular beam epitaxy
S. Schreyeck, K. Brunner, A. Kirchner +7
We study the chemical ordering in BiTeSe grown by molecular beam epitaxy on Si substrates. We produce films in the full composition range from x = 0 to 3, and deter…
Coincidence of Superparamagnetism and perfect quantization in the Quantum Anomalous Hall state
S. Grauer, S. Schreyeck, M. Winnerlein +3
Topological insulators doped with transition metals have recently been found to host a strong ferromagnetic state with perpendicular to plane anisotropy as well as support a quantu…
Magneto-optics of massive Dirac fermions in bulk Bi2Se3
M. Orlita, B. A. Piot, G. Martinez +13
We report on magneto-optical studies of Bi2Se3, a representative member of the 3D topological insulator family. Its electronic states in bulk are shown to be well described by a si…
Suppressing twin formation in Bi2Se3 thin films
N. V. Tarakina, S. Schreyeck, M. Luysberg +8
The microstructure of Bi2Se3 topological-insulator thin films grown by molecular beam epitaxy on InP(111)A and InP(111)B substrates that have different surface roughnesses has been…
Molecular beam epitaxy of high structural quality Bi2Se3 on lattice matched InP(111) substrates
S. Schreyeck, N. V. Tarakina, G. Karczewski +7
Epitaxial layers of the topological insulator Bi2Se3 have been grown by molecular beam epitaxy on laterally lattice-matched InP(111)B substrates. High resolution X-ray diffraction…