178 citations · 1.7k across the 57 of their papers we have counts for
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Second harmonic study of thermally oxidized mono- and few-layer 2H-MoS2
Katharina Burgholzer, Henry Volker Hübschmann, Gerhard Berth +5
A comprehensive study of second harmonic generation on thermally oxidized MoS2 flakes with thickness ranging from monolayer up to seven layers is presented. Observing the fundament…
Carrier localization and dynamics in InGaN: the impact of alloying and Si doping
Ongeziwe Mpatani, Dominik Muth, Anton Krüger +4
Alloying and doping are crucial for enhancing the electronic and optical properties of semiconductors while simultaneously introducing disorder. This report explores the effects of…
Shubnikov-de Haas Oscillations in 2D : A fermiological Charge Carrier Investigation
Julian Max Salchegger, Rajdeep Adhikari, Bogdan Faina +1
High magnetic field and low temperature transport is carried out in order to characterize the charge carriers of . In particular, the Shubnikov-de Haas oscillations…
Negative Longitudinal Magnetoresistance in the Dirac Semimetal PtSe -- Kondo Effect and Surface Spin Dynamics
Julian Max Salchegger, Rajdeep Adhikari, Bogdan Faina +2
The emergence of negative longitudinal magnetoresistance in the topologically non-trivial transition-metal dichalcogenide PtSe is studied. Low /high transport is per…
Identifying the Origin of Thermal Modulation of Exchange Bias in MnPS3/Fe3GeTe2 van der Waals Heterostructures
Aravind Puthirath Balan, Aditya Kumar, Patrick Reiser +21
The exchange bias phenomenon, inherent in exchange-coupled ferromagnetic and antiferromagnetic systems, has intrigued researchers for decades. Van der Waals materials, with their l…
Ultrafast dynamics of optically excited charge carriers in the room-temperature antiferromagnetic semiconductor -MnTe
Changqing Zhu, Patrick Pilch, Anneke Reinold +6
We report on time-resolved optical and terahertz ultrafast spectroscopy of charge-carrier dynamics in the room-temperature antiferromagnetic semiconductor -MnTe. By optically pu…
Spin-phonon interaction and short range order in
Sanja Djurdjić Mijin, Andrijana Šolajić, Jelena Pešić +6
The vibrational properties of ferrimagnetic single crystals are investigated using Raman spectroscopy and density functional theory calculations. Eighteen…
Ultrafast coherent THz lattice dynamics coupled to spins in a van der Waals antiferromagnetic flake
Fabian Mertens, David Mönkebüscher, Eugenio Coronado +8
A coherent THz optical lattice mode is triggered by femtosecond laser pulses in the antiferromagnetic van der Waals semiconductor FePS. The 380 nm thick exfoliated flake was pl…
Cross-plane thermal conductivity of GaN/AlN superlattices
Anna Spindlberger, Dmytro Kysylychyn, Lukas Thumfart +3
Heterostructures consisting of alternating GaN/AlN epitaxial layers represent the building-blocks of state-of-the-art devices employed for active cooling and energy-saving lightnin…
Unravelling the Local Crystallographic Structure of Ferromagnetic GaFeN Nanocrystals Embedded in GaN
A. Navarro-Quezada, K. Gas, A. Spindlberger +4
In the Fe-doped GaN phase-separated magnetic semiconductor GaFeN, the presence of embedded GaFeN nanocrystals determines the magnetic properties of the system. Here, th…
Low temperature and high magnetic field performance of a commercial piezo-actuator probed laser interferometry
R. Adhikari, K. Doesinger, P. Linder +2
The advances in the fields of scanning probe microscopy, scanning tunneling spectroscopy, point contact spectroscopy and point contact Andreev reflection spectroscopy to study the…
Decoupling of epitaxy related trapping effects in AlGaN/GaN metal-insulator semiconductor high electron mobility transistors
M. Huber, G. Pozzovivo, I. Daumiller +5
The decoupling of epitaxial factors influencing on the dynamic instabilities of AlGaN/GaN metal-insulator semiconductor high electron mobility transistors is investigated. Three di…
Out-of-Plane Magnetic Anisotropy in Ordered Ensembles of FeN Nanocrystals Embedded in GaN
A. Navarro-Quezada, K. Gas, T. Truglas +7
Phase-separated semiconductors containing magnetic nanostructures are relevant systems for the realization of high-density recording media. Here, the controlled strain engineering…
Families of magnetic semiconductors -- an overview
Tomasz Dietl, Alberta Bonanni, Hideo Ohno
The interplay of magnetic and semiconducting properties has been in the focus since more than a half of the century. In this introductory article we briefly review the key properti…
Magnetotransport in phase-separated (Ga,Fe)N with '-GaFeN nanocrystals
A. Navarro-Quezada, M. Aiglinger, B. Faina +6
The magnetotransport in phase-separated (Ga,Fe)N containing '-GaFeN (0\,\,y\,1) nanocrystals (NCs) is studied in the temperature range between 2\,K and 300\,K.…
Resonant excitation of infra-red emission in GaN:(Mn,Mg)
Dmytro Kysylychyn, Jan Suffczyński, Tomasz Woźniak +2
By combining experimental photoluminescence excitation spectroscopy and calculations based on density functional theory and many-body Green's functions, the most efficient excitati…
Effects of processing on the stability of molybdenum oxide ultra-thin films
Aitana Tarazaga Martín-Luengo, Harald Köstenbauer, Jörg Winkler +1
The effects of wet chemical processing conventionally employed in device fabrication standards are systematically studied on molybdenum oxide (MoOx) ultra-thin films. We have combi…
All-nitride and In-free AlGaN:Mn/GaN distributed Bragg reflectors for the near-infrared
G. Capuzzo, D. Kysylychyn, R. Adhikari +4
Since the technological breakthrough prompted by the inception of light emitting diodes based on III-nitrides, these material systems have emerged as strategic semiconductors not o…
Stretching magnetism with an electric field in a nitride semiconductor
D. Sztenkiel, M. Foltyn, G. P. Mazur +11
By direct magnetization measurements, performed employing a new detection scheme, we demonstrate an electrical control of magnetization in wurtzite (Ga,Mn)N. In this dilute magneti…
Upper bound for the s-d exchange integral in n-(Ga,Mn)N:Si from magnetotransport studies
R. Adhikari, W. Stefanowicz, B. Faina +3
A series of recent magnetooptical studies pointed to contradicting values of the s-d exchange energy N0α in Mn-doped GaAs and GaN as well as in Fe-doped GaN. Here, a strong sensiti…
Spinodal nanodecomposition in magnetically doped semiconductors
T. Dietl, K. Sato, T. Fukushima +7
This review presents the recent progress in computational materials design, experimental realization, and control methods of spinodal nanodecomposition under three- and two-dimensi…
Incorporation of Mn in AlGaN probed by x-ray absorption and emission spectroscopy, high-resolution microscopy, x-ray diffraction and first-principles calculations
Mauro Rovezzi, Wolfgang Schlögelhofer, Thibaut Devillers +5
Synchrotron radiation x-ray absorption and emission spectroscopy techniques, complemented by high-resolution transmission electron microscopy methods and density functional theory…
Mn as surfactant for the self-assembling of AlGaN/GaN layered heterostructures
Thibaut Devillers, Li Tian, Rajdeep Adhikari +2
The structural analysis of GaN and AlGaN/GaN heterostructures grown by metalorganic vapor phase epitaxy in the presence of Mn reveals how Mn affects the growth process,…
Planar array of self-assembled GaFeN nanocrystals in GaN: Magnetic anisotropy determined via ferromagnetic resonance
Andreas Grois, Thibaut Devillers, Tian Li +1
The magnetic anisotropy of a planar array of GaFeN nanocrystals (NCs) embedded in a GaN host is studied by ferromagnetic resonance. X-ray diffraction and transmission…