52 citations · 320 across the 19 of their papers we have counts for
20 papers
High-temperature growth of ultra thin NbTiN films on lithium niobate for integrated single photon detection
Sjoerd Telkamp, Odiel Hooybergs, Myriam Rihani +9
Lithium niobate-on-insulator (LNOI) is an emerging photonic platform with high potential for scalable quantum information processing due to its strong second-order nonlinearity. Ho…
Single-crystalline CrSb(0001) thin films grown by dc magnetron co-sputtering
S. P. Bommanaboyena, C. Müller, M. Jarošová +15
The recent discovery of altermagnetism has sparked renewed interest in the growth of epitaxial films of the NiAs-phase polymorph of CrSb. This paper describes the magnetron sputter…
Exploring the energy spectrum of a four-terminal Josephson junction: Towards topological Andreev band structures
Tommaso Antonelli, Marco Coraiola, David Christian Ohnmacht +10
Hybrid multiterminal Josephson junctions (JJs) are expected to harbor a novel class of Andreev bound states (ABSs), including topologically nontrivial states in four-terminal devic…
Spin polarization of Quantum Hall states for filling factors 1 < v < 2 measured with microcavity polaritons
Odysseas Williams, Stefan Faelt, Filip Krizek +1
Spin polarization measurements were performed in three 2D Electron Gases in GaAs with densities n = 9.1, 7.2 and 6.5 x10^10 cm-2, in the quantum Hall regime. Full spin polarization…
Development of a Nb-based semiconductor-superconductor hybrid platform
Sjoerd Telkamp, Tommaso Antonelli, Clemens Todt +12
Semiconductor-superconductor hybrid materials are used as a platform to realise Andreev bound states, which hold great promise for quantum applications. These states require transp…
The effect of niobium thin film structure on losses in superconducting circuits
Maxwell Drimmer, Sjoerd Telkamp, Felix L. Fischer +7
The performance of superconducting microwave circuits is strongly influenced by the material properties of the superconducting film and substrate. While progress has been made in u…
Flux-Tunable Josephson Diode Effect in a Hybrid Four-Terminal Josephson Junction
M. Coraiola, A. E. Svetogorov, D. Z. Haxell +10
We investigate the direction-dependent switching current in a flux-tunable four-terminal Josephson junction defined in an InAs/Al two-dimensional heterostructure. The device exhibi…
Flip-chip-based fast inductive parity readout of a planar superconducting island
M. Hinderling, S. C. ten Kate, D. Z. Haxell +8
Properties of superconducting devices depend sensitively on the parity (even or odd) of the quasiparticles they contain. Encoding quantum information in the parity degree of freedo…
Spin-degeneracy breaking and parity transitions in three-terminal Josephson junctions
M. Coraiola, D. Z. Haxell, D. Sabonis +7
Harnessing spin and parity degrees of freedom is of fundamental importance for the realization of emergent quantum devices. Nanostructures embedded in superconductor--semiconductor…
Demonstration of nonlocal Josephson effect in Andreev molecules
D. Z. Haxell, M. Coraiola, M. Hinderling +9
We perform switching current measurements of planar Josephson junctions (JJs) coupled by a common superconducting electrode, with independent control over the two superconducting p…
Zeeman and Orbital Driven Phase Transitions in Planar Josephson Junctions
D. Z. Haxell, M. Coraiola, D. Sabonis +7
We perform supercurrent and tunneling spectroscopy measurements on gate-tunable InAs/Al Josephson junctions (JJs) in an in-plane magnetic field, and report on phase shifts in the c…
Development of Nb-GaAs based superconductor semiconductor hybrid platform by combining in-situ dc magnetron sputtering and molecular beam epitaxy
Clemens Todt, Sjoerd Telkamp, Filip Krizek +10
We present Nb thin films deposited in-situ on GaAs by combining molecular beam epitaxy and magnetron sputtering within an ultra-high vacuum cluster. Nb films deposited at varying p…
Phase-engineering the Andreev band structure of a three-terminal Josephson junction
M. Coraiola, D. Z. Haxell, D. Sabonis +11
In hybrid Josephson junctions with three or more superconducting terminals coupled to a semiconducting region, Andreev bound states may form unconventional energy band structures,…
Control over epitaxy and the role of the InAs/Al interface in hybrid two-dimensional electron gas systems
E. Cheah, D. Z. Haxell, R. Schott +12
In-situ synthesised semiconductor/superconductor hybrid structures became an important material platform in condensed matter physics. Their development enabled a plethora of novel…
Flip-chip-based microwave spectroscopy of Andreev bound states in a planar Josephson junction
M. Hinderling, D. Sabonis, S. Paredes +8
We demonstrate a flip-chip-based approach to microwave measurements of Andreev bound states in a gate-tunable planar Josephson junction using inductively-coupled superconducting lo…
Microwave-induced conductance replicas in hybrid Josephson junctions without Floquet-Andreev states
D. Z. Haxell, M. Coraiola, D. Sabonis +9
Light-matter interaction enables engineering of non-equilibrium quantum systems. In condensed matter, spatially and temporally cyclic Hamiltonians are expected to generate energy-p…
Gate-defined Two-dimensional Hole and Electron Systems in an Undoped InSb Quantum Well
Zijin Lei, Erik Cheah, Filip Krizek +7
Quantum transport measurements are performed in gate-defined, high-quality, two-dimensional hole and electron systems in an undoped InSb quantum well. For both polarities, the carr…
Measurements of Phase Dynamics in Planar Josephson Junctions and SQUIDs
D. Z. Haxell, E. Cheah, F. Křížek +8
We experimentally investigate the stochastic phase dynamics of planar Josephson junctions (JJs) and superconducting quantum interference devices (SQUIDs) defined in epitaxial InAs/…
Atomically sharp domain walls in an antiferromagnet
Filip Krizek, Sonka Reimers, Zdeněk Kašpar +18
The interest in understanding scaling limits of magnetic textures such as domain walls spans the entire field of magnetism from its relativistic quantum fundamentals to application…
Molecular beam epitaxy of CuMnAs
Filip Krizek, Zdeněk Kašpar, Aliaksei Vetushka +13
We present a detailed study of the growth of the tetragonal polymorph of antiferromagnetic CuMnAs by the molecular beam epitaxy technique. We explore the parameter space of growth…