Publications (25)
Strain-induced nonsymmorphic symmetry breaking and removal of Dirac semimetallic nodal line in an orthoperovskite iridate
Jian Liu, D. Kriegner, L. Horak +10
By using a combination of heteroepitaxial growth, structure refinement based on synchrotron x-ray diffraction and first-principles calculations, we show that the symmetry-protected…
Spontaneous lattice distortion and crystal field effects in HoB4
S. Goswami, D. I. Gorbunov, D. Kriegner +9
The tetraboride HoB4 crystallizes in a tetragonal structure (space group P4/mbm), with the Ho atoms realizing a Shastry-Sutherland lattice. It orders antiferromagnetically at TN1 =…
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…
Tuning the electronic properties of J_eff=1/2 correlated semimetal in epitaxial perovskite SrIrO3
Jian Liu, J. -H. Chu, C. Rayan Serrao +11
We investigated the electronic properties of epitaxially stabilized perovskite SrIrO3 and demonstrated the effective strain-control on its electronic structure. Comprehensive trans…
Electrically induced and detected Néel vector reversal in a collinear antiferromagnet
J. Godinho, H. Reichlova, D. Kriegner +11
Electrical detection of the 180 deg spin reversal, which is the basis of the operation of ferromagnetic memories, is among the outstanding challenges in the research of antiferroma…
Temperature Dependence of Relativistic Valence Band Splitting Induced by an Altermagnetic Phase Transition
M. Hajlaoui, S. W. D'Souza, L. Å mejkal +13
Altermagnetic (AM) materials exhibit non-relativistic, momentum-dependent spin-split states, ushering in new opportunities for spin electronic devices. While the characteristics of…
Magnetic anisotropy in antiferromagnetic hexagonal MnTe
D. Kriegner, H. Reichlova, J. Grenzer +12
Antiferromagnetic hexagonal MnTe is a promising material for spintronic devices relying on the control of antiferromagnetic domain orientations. Here we report on neutron diffracti…
Surface versus bulk contributions to the giant Rashba splitting in the ferroelectric α-GeTe(111) semiconductor
J. Krempaský, H. Volfová, S. Muff +14
In systems with broken inversion symmetry spin-orbit coupling (SOC) yields a Rashba-type spin splitting of electronic states, manifested in a k-dependent splitting of the bands. Wh…
Spin flop and crystalline anisotropic magnetoresistance in CuMnAs
M. Wang, C. Andrews, S. Reimers +20
Recent research works have shown that the magnetic order in some antiferromagnetic materials can be manipulated and detected electrically, due to two physical mechanisms: Neel-orde…
Altermagnetism imaged and controlled down to the nanoscale
O. J. Amin, A. Dal Din, E. Golias +17
Nanoscale detection and control of the magnetic order underpins a broad spectrum of fundamental research and practical device applications. The key principle involved is the breaki…
Tetragonal phase of epitaxial room-temperature antiferromagnet CuMnAs
P. Wadley, V. Novák, R. P. Campion +20
Recent studies have demonstrated the potential of antiferromagnets as the active component in spintronic devices. This is in contrast to their current passive role as pinning layer…
X-ray Magnetic Circular Dichroism in Altermagnetic -MnTe
A. Hariki, A. Dal Din, O. J. Amin +14
Altermagnetism is a recently identified magnetic symmetry class combining characteristics of conventional collinear ferromagnets and antiferromagnets, that were regarded as mutuall…
Altermagnetic spintronics
T. Jungwirth, J. Sinova, P. Wadley +5
The research landscape of magnetism has been recently enriched by the discovery of altermagnetism. It is an unconventional phase of matter characterized by a d-wave (or higher even…
Lattice distortion in TmCo: a poly- and single- crystal study
J. Å ebesta, D. Kriegner, J. Prchal
Within the RCo family of compounds, a structural distortion linked with the onset of magnetic ordering around the critical temperature can be observed. One of the less explored…
Giant quadratic magneto-optical response of thin YIG films for sensitive magnetometric experiments
E. Schmoranzerová, T. Ostatnický, J. Kimák +10
We report on observation of a magneto-optical effect quadratic in magnetization (Cotton-Mouton effect) in 50 nm thick layer of Yttrium-Iron Garnet (YIG). By a combined theoretical…
Band structure of CuMnAs probed by optical and photoemission spectroscopy
M. Veis, J. Minar, G. Steciuk +19
Tetragonal phase of CuMnAs progressively appears as one of the key materials for antiferromagnetic spintronics due to efficient current-induced spin-orbit torques whose existence c…
Superconductivity in epitaxial PtSb(0001) thin films
C. Müller, S. P. Bommanaboyena, A. Badura +12
We report superconductivity in epitaxial PtSb(0001) thin films grown on SrF2(111). Electrical transport measurements reveal a superconducting transition at K.…
Two-dimensional = 1/2 antiferromagnetic insulator unraveled from interlayer exchange coupling in artificial perovskite iridate superlattices
L. Hao, D. Meyers, C. Frederick +11
We report an experimental investigation of the two-dimensional = 1/2 antiferromagnetic Mott insulator by varying the interlayer exchange coupling in [(SrIrO)$_1…
Spontaneous anomalous Hall effect arising from an unconventional compensated magnetic phase in a semiconductor
R. D. Gonzalez Betancourt, J. ZubáÄ, R. J. Gonzalez-Hernandez +12
The anomalous Hall effect, commonly observed in metallic magnets, has been established to originate from the time-reversal symmetry breaking by an internal macroscopic magnetizatio…
Semiconductor quantum dots with light-hole exciton ground state: fabrication and fine structure
Y. H. Huo, B. J. Witek, S. Kumar +11
Quantum dots (QDs) can act as convenient hosts of two-level quantum szstems, such as single electron spins, hole spins or excitons (bound electron-hole pairs). Due to quantum confi…
Altermagnetic lifting of Kramers spin degeneracy
J. Krempaský, L. Šmejkal, S. W. D'Souza +20
Lifted Kramers spin-degeneracy has been among the central topics of condensed-matter physics since the dawn of the band theory of solids. It underpins established practical applica…
Thermally induced all-optical ferromagnetic resonance in thin YIG films
E. Schmoranzerová, J. Kimák, R. Schlitz +10
All-optical ferromagnetic resonance (AO-FMR) is a powerful tool for local detection of micromagnetic parameters, such as magnetic anisotropy, Gilbert damping or spin stiffness. In…
Giant enhancement of the skyrmion stability in a chemically strained helimagnet
A. S. Sukhanov, Praveen Vir, A. Heinemann +6
We employed small-angle neutron scattering to demonstrate that the magnetic skyrmion lattice can be realized in bulk chiral magnets as a thermodynamically stable state at temperatu…
Multiple-stable anisotropic magnetoresistance memory in antiferromagnetic MnTe
D. Kriegner, K. Vyborny, K. Olejnik +10
A common perception assumes that magnetic memories require ferromagnetic materials with a non-zero net magnetic moment. However, it has been recently proposed that compensated anti…
Current induced torques in structures with ultra-thin IrMn antiferromagnet
H. Reichlová, D. Kriegner, V. Holý +8
Relativistic current induced torques and devices utilizing antiferromagnets have been independently considered as two promising new directions in spintronics research. Here we repo…