64 citations · 264 across the 15 of their papers we have counts for
15 papers
Unconventional relativistic spin polarization of electronic bands in an altermagnet
A. Dal Din, D. A. Usanov, L. Šmejkal +22
Altermagnetism is a recently identified phase with a d, g or i-wave spin symmetry of magnetic ordering. Its discovery opens new research fronts at intersections of magnetism and sp…
Reexamining Circular Dichroism in Photoemission From a Topological Insulator
Ittai Sidilkover, Yun Yen, Sunil Wilfred D'Souza +10
The orbital angular momentum (OAM) of electron states is an essential ingredient for topological and quantum geometric quantities in solids. For example, Dirac surface states with…
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…
Observation of time-reversal symmetry breaking in the band structure of altermagnetic RuO
O. Fedchenko, J. Minar, A. Akashdeep +20
Altermagnets are an emerging third elementary class of magnets. Unlike ferromagnets, their distinct crystal symmetries inhibit magnetization while, unlike antiferromagnets, they pr…
Collective topological spin dynamics in a correlated spin glass
Juraj Krempaský, Gunther Springholz, Sunil Wilfred D'Souza +12
The interplay between spin-orbit interaction (SOI) and magnetic order is currently one of the most active research fields in condensed matter physics and leading the search for mat…
Chiral magnons in altermagnetic RuO2
Libor Šmejkal, Alberto Marmodoro, Kyo-Hoon Ahn +8
Magnons in ferromagnets have one chirality, and typically are in the GHz range and have a quadratic dispersion near the zero wavevector. In contrast, magnons in antiferromagnets ar…
Single crystal studies and electronic structure investigation of a room-temperature semiconductor NaMnAs
J. Volny, V. Holy, K. Charvatova +11
We report synthesis of single crystalline NaMnAs, confirm its antiferromagnetic order and characterise the sample by photoemission spectroscopy. The electronic structure was studie…
Role of chemical disorder in tuning the Weyl points in vanadium doped CoTiSn
Payal Chaudhary, Krishna Kant Dubey, Gaurav K. Shukla +8
The lack of time-reversal symmetry and Weyl fermions give exotic transport properties to Co-based Heusler alloys. In the present study, we have investigated the role of chemical di…
Influence of anti-site disorder and electron-electron correlations on the electronic structure of CeMnNi
Pampa Sadhukhan, Sunil Wilfred D'Souza, Vipin Kumar Singh +7
CeMnNi exhibits an unusually large spin polarization, but its origin has baffled researchers for more than a decade. We use bulk sensitive hard x-ray photoelectron spectroscopy…
Robust Bain distortion in the premartensite phase of platinum substituted Ni2MnGa magnetic shape memory alloy
Sanjay Singh, B. Dutta, S. W. DSouza +7
The premartensite phase of shape memory and magnetic shape memory alloys (MSMAs) is believed to be a precursor state of the martensite phase with preserved austenite phase symmetry…
Room temperature tetragonal noncollinear antiferromagnet PtMnGa
S. Singh, S. W. D'Souza, E. Suard +7
Here we present the tetragonal stoichiometric Heusler compound PtMnGa with the noncollinear AFM order stable up to 350 K. It is resolved by the neutron diffraction as a helical…
Resonant impurity states in chemically disordered half-Heusler Dirac semimetals
J. Kiss, S. W. D'Souza, L. Wollmann +6
We address the electron transport characteristics in bulk half-Heusler alloys with their compositions tuned to the borderline between topologically nontrivial semi-metallic and tri…
Chemical disorder as engineering tool for spin-polarizationin Mn3Ga-based Heusler systems
Stanislav Chadov, Sunil Wilfred D'Souza, Lukas Wollmann +3
Our study highlights spin-polarization mechanisms in metals, by focusing on the mobilities of conducting electrons with different spins instead of their quantities. Here, we engine…
Magnetic properties and electronic structure of Mn-Ni-Ga magnetic shape memory alloys
Sunil Wilfred D'Souza, Tufan Roy, Sudipta Roy Barman +1
Influence of disorder, antisite defects, martensite transition and compositional variation on the magnetic properties and electronic structure of MnNiGa and MnNi$_{2-x}…
Antiferromagnetic Exchange Interactions in NiMnIn ferromagnetic Heusler alloy
K. R. Priolkar, P. A. Bhobe, D. N. Lobo +4
Magnetism in Ni-Mn-Z (Z = Ga,In,Sn,Sb) Heusler alloys has so far been predominantly attributed to Rudermann-Kittel-Kasuya-Yoshida type interactions between Mn atoms. We investigate…