86 citations · 534 across the 22 of their papers we have counts for
22 papers
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…
Phase purity and surface morphology of high-Jc superconducting Bi2Sr2Ca1Cu2O8+δ thin films
Sandra Keppert, Bernd Aichner, Rajdeep Adhikari +3
Bi2Sr2Ca1Cu2O8+d (Bi-2212) thin films with thicknesses less than 50 nm (<20 unit cells) are grown by pulsed laser deposition (PLD) onto (001) LaAlO3 (LAO) single crystal substrates…
Effect of impurity scattering on percolation of bosonic islands and reentrant superconductivity in Fe implanted NbN thin films
Rajdeep Adhikari, Bogdan Faina, Verena Ney +4
A reentrant temperature dependence of the thermoresistivity between an onset local superconducting ordering temperature and a g…
Positive magnetoresistance and chiral anomaly in exfoliated type-II Weyl semimetal -WTe
R. Adhikari, S. Adhikari, B. Faina +5
Layered van der Waals semimetallic -WTe, exhibiting intriguing properties which include non-saturating extreme positive magnetoresistance (MR) and tunable chira…
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…
Ferromagnetic phase transition in topological crystalline insulator thin films: interplay of anomalous Hall angle and magnetic anisotropy
R. Adhikari, V. V. Volobuev, B. Faina +2
In magnetic topological phases of matter, the quantum anomalous Hall (QAH) effect is an emergent phenomenon driven by ferromagnetic doping, magnetic proximity effects and strain en…
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.…
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…
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…
Experimental determination of Rashba spin-orbit coupling in wurtzite -GaN:Si
W. Stefanowicz, R. Adhikari, T. Andrearczyk +5
Millikelvin magnetotransport studies are carried out on heavily -doped wurtzite GaN:Si films grown on semi-insulating GaN:Mn buffer layers by metal-organic vapor phase epitaxy.…
Manipulating Mn--Mg cation complexes to control the charge- and spin-state of Mn in GaN
Thibaut Devillers, Mauro Rovezzi, Nevill Gonzalez Szwacki +15
Owing to the variety of possible charge and spin states and to the different ways of coupling to the environment, paramagnetic centres in wide band-gap semiconductors and insulator…
Magnetooptical properties of (Ga,Fe)N layers
J. Papierska, J. -G. Rousset, W. Pacuski +13
Magnetooptical properties of (Ga,Mn)N layers containing various concentrations of Fe-rich nanocrystals embedded in paramagnetic (Ga,Fe)N layers are reported. Previous studies of su…
Relation between exciton splittings, magnetic circular dichroism, and magnetization in wurtzite (Ga,Fe)N
J. -G. Rousset, J. Papierska, W. Pacuski +12
The question of the correlation between magnetization, band splittings, and magnetic circular dichroism (MCD) in the fundamental gap region of dilute magnetic semiconductors is exa…
Origin of low-temperature magnetic ordering in Ga1-xMnxN
M. Sawicki, T. Devillers, S. Gałȩski +9
By employing highly sensitive millikelvin SQUID magnetometry, the magnitude of the Curie temperature as a function of the Mn concentration x is determined for thoroughly characteri…
The Fe-Mg interplay and the effect of deposition mode in (Ga,Fe)N doped with Mg
A. Navarro-Quezada, N. Gonzalez Szwacki, W. Stefanowicz +9
The effect of Mg codoping and its deposition mode on the Fe distribution in (Ga,Fe)N layers grown by metalorganic vapor phase epitaxy is investigated. Both homogeneously- and digit…
Effects of s,p - d and s - p exchange interactions probed by exciton magnetospectroscopy in (Ga,Mn)N
J. Suffczynski, A. Grois, W. Pacuski +6
Near band-gap photoluminescence and reflectivity in magnetic field are employed to determine the exchange-induced splitting of free exciton states in paramagnetic wurtzite Ga1-xMnx…
Element specific characterization of heterogeneous magnetism in (Ga,Fe)N films
I. A. Kowalik, A. Persson, M. Á. Niño +5
We employ x-ray spectroscopy to characterize the distribution and magnetism of particular alloy constituents in (Ga,Fe)N films grown by metal organic vapor phase epitaxy. Furthermo…
Experimental probing of exchange interactions between localized spins in the dilute magnetic insulator (Ga,Mn)N
A. Bonanni, M. Sawicki, T. Devillers +16
The sign, magnitude, and range of the exchange couplings between pairs of Mn ions is determined for (Ga,Mn)N and (Ga,Mn)N:Si with x < 3%. The samples have been grown by metalorgani…
Embedded magnetic phases in (Ga,Fe)N: the key role of growth temperature
A. Navarro-Quezada, W. Stefanowicz, Tian Li +9
The local chemistry, structure, and magnetism of (Ga,Fe)N nanocomposites grown by metal organic vapor phase epitaxy is studied by high resolution synchrotron x-ray diffraction and…
Structural and paramagnetic properties of dilute Ga1-xMnxN
Wiktor Stefanowicz, Dariusz Sztenkiel, Bogdan Faina +10
Systematic investigations of the structural and magnetic properties of single crystal (Ga,Mn)N films grown by metal organic vapor phase epitaxy are presented. High resolution trans…
Local structure of (Ga,Fe)N and (Ga,Fe)N:Si investigated by x-ray absorption fine structure spectroscopy
Mauro Rovezzi, Francesco D'Acapito, Andrea Navarro-Quezada +6
X-ray absorption fine-structure (XAFS) measurements supported by {\em ab initio} computations within the density functional theory (DFT) are employed to systematically characterize…