168 citations · 1.7k across the 34 of their papers we have counts for
36 papers
Gate-tunable magnetic damping in van der Waals Heterostructures
Lukas Cvitkovich, Klaus Zollner, Jaroslav Fabian
Active control of magnetic damping is a crucial capability for the development of low-power, tunable spintronic devices. In this work, we demonstrate that the intrinsic magnetic da…
Resonant magnetic proximity hot spots in Co/hBN/graphene
Klaus Zollner, Lukas Cvitkovich, Riccardo Silvioli +2
Magnetic proximity effects in Co/hBN/graphene heterostructures are systematically analyzed via first-principles calculations, demonstrating a pronounced localized spatial variation…
Radial Rashba spin-orbit fields in commensurate twisted transition-metal dichalcogenide bilayers
Thomas Naimer, Paulo E. Faria Junior, Klaus Zollner +1
In commensurate twisted homobilayers, purely radial Rashba spin-orbit fields can emerge. We employ first-principles calculations to investigate the band structures and the spin-orb…
Machine Learning Prediction of Magnetic Proximity Effect in van der Waals Heterostructures: From Atoms to Moiré
Lukas Cvitkovich, Klaus Zollner, Jaroslav Fabian
We introduce a machine learning framework that efficiently predicts large-scale proximity-induced magnetism in van der Waals heterostructures, overcoming the high computational cos…
Spin injection and detection in all-van der Waals 2D devices
Jan Bärenfänger, Klaus Zollner, Lukas Cvitkovich +7
In this work we report efficient out-of-plane spin injection and detection in an all-van der Waals based heterostructure using only exfoliated 2D materials. We demonstrate spin inj…
Layer-selective spin-orbit coupling and strong correlation in bilayer graphene
Anna M. Seiler, Yaroslav Zhumagulov, Klaus Zollner +8
Spin-orbit coupling (SOC) and electron-electron interaction can mutually influence each other and give rise to a plethora of intriguing phenomena in condensed matter systems. In pr…
Emergence of radial Rashba spin-orbit fields in twisted van der Waals heterostructures
Tobias Frank, Paulo E. Faria Junior, Klaus Zollner +1
Rashba spin-orbit coupling is a quintessential spin interaction appearing in virtually any electronic heterostructure. Its paradigmatic spin texture in the momentum space forms a t…
Spin-orbit torque in single-molecule junctions from ab initio
María Camarasa-Gómez, Daniel Hernangómez-Pérez, Ferdinand Evers
The use of electric fields applied across magnetic heterojunctions that lack spatial inversion symmetry has been previously proposed as a non-magnetic mean of controlling localized…
Quantum Spin Hall Effect in Magnetic Graphene
Talieh S. Ghiasi, Davit Petrosyan, Josep Ingla-Aynés +9
A promising approach to attain long-distance coherent spin propagation is accessing topological spin-polarized edge states in graphene. Achieving this without external magnetic fie…
Twist- and gate-tunable proximity spin-orbit coupling, spin relaxation anisotropy, and charge-to-spin conversion in heterostructures of graphene and transition-metal dichalcogenides
Klaus Zollner, Simão M. João, Branislav K. Nikolić +1
We present a DFT-based investigation of the twist-angle dependent proximity spin-orbit coupling (SOC) in graphene/TMDC structures. We find that for Mo-based TMDCs the proximity val…
Charge transfer and asymmetric coupling of MoSe valleys to the magnetic order of CrSBr
C. Serati de Brito, P. E. Faria Junior, T. S. Ghiasi +13
Van der Waals (vdW) heterostructures composed of two-dimensional (2D) transition metal dichalcogenides (TMD) and vdW magnetic materials offer an intriguing platform to functionaliz…
Electronic and Spin-Orbit Properties of hBN Encapsulated Bilayer Graphene
Klaus Zollner, Eike Icking, Jaroslav Fabian
Van der Waals (vdW) heterostructures consisting of Bernal bilayer graphene (BLG) and hexagonal boron nitride (hBN) are investigated. By performing first-principles calculations we…
Low-scaling GW algorithm applied to twisted transition-metal dichalcogenide heterobilayers
Maximilian Graml, Klaus Zollner, Daniel Hernangómez-Pérez +2
The method is widely used for calculating the electronic band structure of materials. The high computational cost of algorithms prohibits their application to many system…
Strong manipulation of the valley splitting upon twisting and gating in MoSe/CrI and WSe/CrI van der Waals heterostructures
Klaus Zollner, Paulo E. Faria Junior, Jaroslav Fabian
We investigate the twist-angle and gate dependence of the proximity-induced exchange coupling in the monolayer transition-metal dichalcogenides (TMDCs) MoSe and WSe due to…
Proximity effects in graphene on monolayers of transition-metal phosphorus trichalcogenides MPX
Klaus Zollner, Jaroslav Fabian
We investigate the electronic band structure of graphene on a series of two-dimensional magnetic transition-metal phosphorus trichalcogenide monolayers, MPX with M={Mn,Fe,Ni,Co…
Sensitivity of the MnTe valence band to orientation of magnetic moments
Paulo E. Faria Junior, Koen A. de Mare, Klaus Zollner +3
An effective model of the hexagonal (NiAs-structure) manganese telluride valence band in the vicinity of the A-point of the Brillouin zone is derived. It is shown that while for th…
Proximity spin-orbit and exchange coupling in ABA and ABC trilayer graphene van der Waals heterostructures
Klaus Zollner, Martin Gmitra, Jaroslav Fabian
We investigate the proximity spin-orbit and exchange couplings in ABA and ABC trilayer graphene encapsulated within monolayers of semiconducting transition-metal dichalcogenides an…
Twist-angle dependent proximity induced spin-orbit coupling in graphene/transition-metal dichalcogenide heterostructures
Thomas Naimer, Klaus Zollner, Martin Gmitra +1
We investigate the proximity-induced spin-orbit coupling in heterostructures of twisted graphene and monolayers of transition-metal dichalcogenides (TMDCs) MoS, WS, MoSe$_2…
Engineering Proximity Exchange by Twisting: Reversal of Ferromagnetic and Emergence of Antiferromagnetic Dirac Bands in Graphene/CrGeTe
Klaus Zollner, Jaroslav Fabian
We investigate the twist-angle and gate dependence of the proximity exchange coupling in twisted graphene on monolayer CrGeTe from first principles. The proximitized Di…
Bilayer graphene encapsulated within monolayers of WS or CrGeTe: Tunable proximity spin-orbit or exchange coupling
Klaus Zollner, Jaroslav Fabian
Van der Waals (vdW) heterostructures consisting of bilayer graphene (BLG) encapsulated within monolayers of strong spin-orbit semiconductor WS or ferromagnetic semiconductor Cr…
Graphene on two-dimensional hexagonal BN, AlN, and GaN: Electronic, spin-orbit, and spin relaxation properties
Klaus Zollner, Aron W. Cummings, Stephan Roche +1
We investigate the electronic structure of graphene on a series of 2D hexagonal nitride insulators hXN, X = B, Al, and Ga, with DFT calculations. A symmetry-based model Hamiltonian…
Electronic and magnetic properties of -FeGe films embedded in vertical spin valve devices
Dietmar Czubak, Samuel Gaucher, Lars Oppermann +5
We studied metastable -FeGe, a novel layered tetragonal material, embedded as a spacer layer in spin valve structures with ferromagnetic FeSi and CoFeSi electrodes.…
Heterostructures of graphene and topological insulators BiSe, BiTe, and SbTe
Klaus Zollner, Jaroslav Fabian
Prototypical three-dimensional topological insulators of the BiSe family provide a beautiful example of the appearance of the surface states inside the bulk band gap caused…
Swapping Exchange and Spin-Orbit Coupling in 2D van der Waals Heterostructures
Klaus Zollner, Martin Gmitra, Jaroslav Fabian
The concept of swapping the two most important spin interactions -- exchange and spin-orbit coupling -- is proposed based on two-dimensional multilayer van der Waals heterostructur…