44 citations · 133 across the 26 of their papers we have counts for
26 papers
Device contacts as spin-state selectors for silicon vacancies in 4H-SiC
Aurora Teien, Maria Mendes Martins, Andreas Gottscholl +11
Optically addressable defect spins in semiconductors are promising building blocks for scalable quantum technologies. Yet, the consequences of conventional contact schemes used in…
Doping dependence of local moments in infinite layer nickelates
Martin Gonzalez, Andreas Suter, Michal Kiaba +5
The infinite layer nickelates are notable for their lack of long-range antiferromagnetic ordering, in contrast to the parent compounds of the superconducting cuprates. Instead, the…
Modernization and Statistical Validation of a Multilayer TRIM.SP Code for Low-Energy Muon and Ion Implantation
Zaher Salman, Ryan M. L. McFadden, Thomas Prokscha
We describe the staged modernization of a local multilayer TRIM.SP implementation, denoted TRIM.SP-NL. The work included behavior-preserving refactoring, correction of localized bo…
Muonium dynamics as a probe for depth-resolved properties of 4H-SiC
Maria Mendes Martins, Piyush Kumar, Marianne E. Bathen +5
This study establishes a baseline for muonium (Mu) charge-exchange dynamics in n-type 4H-SiC through a detailed low-energy muon spin rotation (LE-uSR) investigation. Epitaxially gr…
Secondary electron yield from aluminium-coated foils for muon tagging and beam monitoring up to 60 MeV/c
Gianluca Janka, Michael W. Heiss, Maxime Lamotte +2
The feasibility of foil-based muon tagging is investigated in the momentum range below 60 MeV/c, with particular focus on its applicability to the low-momentum range spanning appro…
A comparison of simulation tools for Muon-Induced X-ray Emission (MIXE) in thin films: a study case with lithium batteries
Maxime Lamotte, Michael W. Heiss, Thomas Prokscha +1
We present a comparative study of three Monte Carlo simulation frameworks -SRIM, GEANT4, and PHITS- for modeling the transport, stopping, and atomic cascade of negative muons in mi…
Net Magnetization and Inhomogeneous Magnetic Order in a High-Tc Nickelate Superconductor
Alexander J. Grutter, Nurul Fitriyah, Brian B. Maranville +10
High-temperature and high-magnetic-field-induced re-entrant superconductivity has been discovered in the infinite-layer nickelate (SECNO). In…
Niobium's intrinsic coherence length and penetration depth revisited using low-energy muon spin spectroscopy and secondary-ion mass spectrometry
Ryan M. L. McFadden, Jonathan W. Angle, Eric M. Lechner +7
We report direct, simultaneous measurements of the London penetration depth () and Bardeen-Cooper-Schrieffer (BCS) coherence length () in oxygen-doped niobium, with impur…
Cu-spin Correlation in the Electron-overdoped High-Tc Cuprate Thin Films of La_2-x_Ce_x_CuO_4_ Probed by Low-energy Muons
S. E. Park, Y. Kawai, A. Suter +7
We investigated the Cu-spin correlation in the overdoped regime of the electron-doped high-Tc cuprate thin films of La_2-x_Ce_x_CuO_4_, changing the reduction condition from muon s…
Surface-Localized Magnetic Order in RuO2 Thin Films Revealed by Low-Energy Muon Probes
Akashdeep Akashdeep, Sachin Krishnia, Jae-Hyun Ha +12
Ruthenium dioxide (RuO2) has recently emerged as a candidate altermagnet, yet its intrinsic magnetic ground state, particularly in thin films, remains debated. This study aims to c…
Microwave Spectroscopy of the Muonium Fine Structure Interval
Philipp Blumer, Gianluca Janka, Svenja Geissmann +8
We report a microwave spectroscopy measurement of the muonium fine structure transition, yielding a transition frequency of , in ag…
Implantation studies of low-energy positive muons in niobium thin films
Ryan M. L. McFadden, Andreas Suter, Leon Ruf +5
Here we study the range of keV positive muons implanted in NbO( nm)/Nb( nm)/SiO(300 nm)/Si [ = 3.6 nm, 3.3 nm; = 42.0 nm, 60.1 nm] thin films using l…
Unconventional polaronic ground state in superconducting LiTiO
Zubia Hasan, Grace A. Pan, Harrison LaBollita +23
Geometrically frustrated lattices can display a range of correlated phenomena, ranging from spin frustration and charge order to dispersionless flat bands due to quantum interferen…
New Frontiers in Muon-Spin Spectroscopy Using Si-Pixel Detectors
Heiko Augustin, Niklaus Berger, Andrin Doll +9
The study of novel quantum materials relies on muon-spin rotation, relaxation, or resonance (\mSR) measurements. Yet, a fundamental limitation persists: many of these materials can…
Coherent microwave control of coupled electron-muon centers
Andrin Doll, Chennan Wang, Thomas Prokscha +2
Coherent control by means of tailored excitation is a key to versatile experimental schemes for spectroscopic investigation and technological utilization of quantum systems. Here w…
Complex Magnetic Ordering in Candidate Topological Superconductors
Purnima P. Balakrishnan, Hemian Yi, Zi-Jie Yan +13
The search for chiral topological superconductivity in magnetic topological insulator (TI)-FeTe heterostructures is a key frontier in condensed matter physics, with potential appli…
Advanced muon-spin spectroscopy with high lateral resolution using Si-pixel detectors
Lukas Mandok, Pascal Isenring, Heiko Augustin +7
Muon-spin spectroscopy at continuous sources has stagnated at a stopped muons rate of ~40 kHz for the last few decades. The major limiting factor is the requirement of a single muo…
Monitoring the tagging efficiency of the Low-Energy Muon beamline through background analysis: Insights into the long-term performance of ultrathin carbon foils
Gianluca Janka, Herman Ishchenko, Zaher Salman +2
The efficient tagging of individual muons, along with the stability of the involved ultrathin carbon foil, is critical for ensuring fast, reliable and reproducible low-energy muon…
Observation and manipulation of charge carrier distribution at the SiO/Si interface
Maria M. Martins, Piyush Kumar, Marianne E. Bathen +3
Using low-energy muons, we map the charge carrier concentration as a function of depth and electric field across the \SiOSi interface up to a depth of \SI{100}{\nano\meter} in Si-b…
Improving the low-energy muon beam quality of the LEM beamline at PSI: Characterisation of ultra-thin carbon foils
Gianluca Janka, Maria Mendes Martins, Xiaojie Ni +3
The Low-Energy Muon beamline (LEM) at the Paul Scherrer Institute currently stands as the world's only facility providing a continuous beam of low-energy muons with keV energies fo…
Small sample measurements at the low energy muon facility of Paul Scherrer Institute
X. Ni, L. Zhou, M. M. Martins +3
The low energy muon spin rotation spectroscopy (LE-SR) is primarily used to investigate thin films, surfaces, and interfaces of materials, which has matured at the Paul Scherrer…
Direct observation of hole carrier density profiles and their light induced manipulation at the surface of Ge
T. Prokscha, K. H. Chow, Z. Salman +2
We demonstrate that, by using low-energy positive muon () spin spectroscopy as a local probe technique, the profiles of free charge carriers can be directly determined in the…
Suppression of magnetic excitations near the surface of the topological Kondo insulator SmB6
P. K. Biswas, M. Legner, G. Balakrishnan +8
We present a detailed investigation of the temperature and depth dependence of the magnetic properties of 3D topological Kondo insulator SmB6 , in particular near its surface. We f…
Strong Meissner screening change in superconducting radio frequency cavities due to mild baking
A. Romanenko, A. Grassellino, F. Barkov +3
We investigate "hot" regions with anomalous high field dissipation in bulk niobium superconducting radio frequency cavities for particle accelerators by using low energy muon spin…