Libor Šmejkal
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View article: Spin and pair density waves in two-dimensional altermagnetic metals
Spin and pair density waves in two-dimensional altermagnetic metals Open
Altermagnetism, a recently proposed and experimentally confirmed class of magnetic order, features collinear compensated magnetism with unconventional spin-split bands. Here, we show that in a metallic 2D d -wave altermagnet with [ C …
View article: Spin polarization engineering in $d$-wave altermagnets
Spin polarization engineering in $d$-wave altermagnets Open
Altermagnets host unconventional spin-polarized bands despite zero net magnetization, but controlling their spin structure remains challenging. We propose a multi-field approach to engineer spin polarization in $d$-wave altermagnets using …
View article: Quantization of spin circular photogalvanic effect in altermagnetic Weyl semimetals
Quantization of spin circular photogalvanic effect in altermagnetic Weyl semimetals Open
We theoretically predict a spin-current analog of the quantized circular photogalvanic effect in Weyl semimetals. This phenomenon is forbidden in antiferromagnets by symmetry but uniquely allowed in altermagnets, highlighting a novel and i…
View article: Highly efficient non-relativistic Edelstein effect in nodal p-wave magnets
Highly efficient non-relativistic Edelstein effect in nodal p-wave magnets Open
The origin and efficiency of charge-to-spin conversion, known as the Edelstein effect (EE), has been typically linked to spin-orbit coupling mechanisms, which require materials with heavy elements within a non-centrosymmetric environment. …
View article: Quantum-impurity sensing of altermagnetic order
Quantum-impurity sensing of altermagnetic order Open
Quantum sensing with individual spin defects has emerged as a versatile platform to probe microscopic properties of condensed matter systems. Here we demonstrate that quantum relaxometry with nitrogen-vacancy (NV) centers in diamond can re…
View article: Observation of the anomalous Nernst effect in altermagnetic candidate Mn5Si3
Observation of the anomalous Nernst effect in altermagnetic candidate Mn5Si3 Open
The anomalous Nernst effect generates a voltage transverse to an applied thermal gradient in some magnetically ordered systems. While the effect was considered excluded in compensated magnetic materials with collinear ordering, in the rece…
View article: Revealing the Altermagnetism in Hematite via XMCD Imaging and Anomalous Hall Electrical Transport
Revealing the Altermagnetism in Hematite via XMCD Imaging and Anomalous Hall Electrical Transport Open
Altermagnets are a class of magnetic materials that exhibit unconventional transport properties, such as an anomalous Hall effect (AHE), despite having compensated sublattice magnetic moments. In this study, fundamental experimental eviden…
View article: Optical signatures of bulk g-wave altermagnetism in MnTe
Optical signatures of bulk g-wave altermagnetism in MnTe Open
In planar altermagnets, optical excitation by linearly polarized ultrashort pulses can induce spin polarizations in the electronic excited states in a controlled fashion, even though the material is magnetically compensated. Here, we theor…
View article: Even-in-magnetic field part of transverse resistivity as a probe of magnetic transitions
Even-in-magnetic field part of transverse resistivity as a probe of magnetic transitions Open
The component of the resistivity tensor ρij corresponding to voltage transverse to both an applied current and a magnetic field can be separated into odd and even parts with respect to the applied magnetic field. The former contains inform…
View article: Ultrafast electron-phonon scattering in an antiferromagnetic Dirac semimetal
Ultrafast electron-phonon scattering in an antiferromagnetic Dirac semimetal Open
Topological antiferromagnetic systems, which exhibit anisotropic band structures combined with complex relativistic spin structures in momentum space, have shown strong magnetoresistance effects driven by Dirac fermion characteristics. Whi…
View article: Atomic Altermagnetism
Atomic Altermagnetism Open
Altermagnetism has been recently experimentally verified by photoemission mapping of the spin order in momentum space in MnTe and CrSb, which feature two anisotropic sublattices with antiparallel magnetic dipole moments. In this work, we e…
View article: Spin and pair density waves in 2D altermagnetic metals
Spin and pair density waves in 2D altermagnetic metals Open
Altermagnetism, a recently proposed and experimentally confirmed class of magnetic order, features collinear compensated magnetism with unconventional d-, g-, or i-wave spin order. Here, we show that in a metallic 2D d-wave altermagnet wit…
View article: Origin of the anomalous Hall effect in Cr-doped <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>RuO</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>
Origin of the anomalous Hall effect in Cr-doped Open
RuO2 is one of the most highlighted candidates for altermagnetism. However, the most recent muon spin spectroscopy and neutron studies demonstrated the absence of magnetic order in this system. The electronic structure of RuO2 hints at a p…
View article: Spin Hall magnetoresistance at the altermagnetic insulator/Pt interface
Spin Hall magnetoresistance at the altermagnetic insulator/Pt interface Open
The resistance of a heavy metal can be modulated by an adjacent magnetic material through the combined effects of the spin Hall effect, inverse spin Hall effect, and dissipation of the spin accumulation at the interface. This phenomenon is…
View article: Spontaneous crystal thermal Hall effect in insulating altermagnets
Spontaneous crystal thermal Hall effect in insulating altermagnets Open
Data repository for the article 'Spontaneous crystal thermal Hall effect in insulating altermagnets' If you use these data, please cite the peer-reviewed article that describes this work: R. Hoyer, R. Jaeschke-Ubiergo, K. H. Ahn, L. Šmejk…
View article: Transport theory and spin-transfer physics in d-wave altermagnets
Transport theory and spin-transfer physics in d-wave altermagnets Open
We develop a mesoscale transport theory for the charge and spin degrees of freedom of itinerant carriers in a $d$-wave altermagnet. Our effective Lagrangian description is built upon the slave-boson formulation of the microscopic $t-J$ mod…
View article: Highly Efficient Non-relativistic Edelstein effect in p-wave magnets
Highly Efficient Non-relativistic Edelstein effect in p-wave magnets Open
The origin and efficiency of charge-to-spin conversion, known as the Edelstein effect (EE), has been typically linked to spin-orbit coupling mechanisms, which require materials with heavy elements within a non-centrosymmetric environment. …
View article: Ultrafast electron dynamics in altermagnetic materials
Ultrafast electron dynamics in altermagnetic materials Open
Altermagnets constitute a new class of magnetic materials that combine properties previously thought to be exclusive to either antiferromagnets or ferromagnets, and have unique properties of their own. In particular, a combination of symme…
View article: Altermagnetism: an unconventional spin-ordered phase of matter
Altermagnetism: an unconventional spin-ordered phase of matter Open
The Pauli exclusion principle combined with interactions between fermions is a basic mechanism across condensed-matter systems giving rise to a spontaneous breaking of the spin-space rotation symmetry of spin-ordered phases. Ferromagnetism…
View article: Altermagnetic variants in thin films of Mn5Si3
Altermagnetic variants in thin films of Mn5Si3 Open
The altermagnet candidate Mn5Si3 has attracted wide attention in the context of non-relativistic spin physics, due to its composition of light elements. However, the presumed structure of the altermagnetic phase had yet to be demonstrated.…
View article: Altermagnetism: Exploring New Frontiers in Magnetism and Spintronics
Altermagnetism: Exploring New Frontiers in Magnetism and Spintronics Open
Recent developments have introduced a groundbreaking form of collinear magnetism known as “altermagnetism”. This emerging magnetic phase is characterized by robust time‐reversal symmetry breaking, antiparallel magnetic order, and alternati…
View article: Altermagnets and beyond: Nodal magnetically-ordered phases
Altermagnets and beyond: Nodal magnetically-ordered phases Open
The recent discovery of altermagnets has opened new perspectives in the field of ordered phases in condensed matter. In strongly-correlated superfluids, the nodal p-wave and d-wave ordered phases of $^{3}$He and cuprates play a prominent r…
View article: Spin and orbital magnetism by light in rutile altermagnets
Spin and orbital magnetism by light in rutile altermagnets Open
While the understanding of altermagnetism is still at a very early stage, it is expected to play a role in various fields of condensed matter research, for example spintronics, caloritronics and superconductivity. In the field of optical m…
View article: Anomalous Nernst effect in the noncollinear antiferromagnet Mn5Si3
Anomalous Nernst effect in the noncollinear antiferromagnet Mn5Si3 Open
Investigating the off-diagonal components of the conductivity and thermoelectric tensor of materials hosting complex antiferromagnetic structures has become a viable method to reveal the effects of topology and chirality on the electronic …
View article: All optical excitation of spin polarization in d-wave altermagnets
All optical excitation of spin polarization in d-wave altermagnets Open
The recently discovered altermagnets exhibit collinear magnetic order with zero net magnetization but with unconventional spin-polarized d/g/i-wave band structures, expanding the known paradigms of ferromagnets and antiferromagnets. In add…
View article: Codebase release r1.0 for amcheck
Codebase release r1.0 for amcheck Open
Altermagnets (AM) is a recently discovered class of collinear magnets that share some properties (anomalous transport, etc) with ferromagnets, some (zero net magnetization) with antiferromagnets, while also exhibiting unique properties (sp…