In this theory project, we want to accomplish two major tasks: Firstly, quantum dynamics and kinetics methods will be worked out to calculate the strongly driven charge and spin dynamics in ultrafast time-resolved scanning tunneling spectroscopy experiments, tunnel junctions, and photoemission experiments. These calculations will also deliver microscopic information as input for coarse-grained models.

Secondly, schemes are to be developed and implemented for large-scale electromagnetic/micromagnetic simulations to infer the dynamical, highly intense local field distributions for given magnetic nano- and heterostructures such as spintronic THz sources. Our approach also captures the strongly non-linear influence on the local magnetic dynamics, including the transient changes in the underlying microscopic magnetic interactions, as well as the modifications of the traversing electromagnetic waves such as strong changes in their frequency, phase, or polarization. The results are expected to contribute to a deeper understanding of the dynamic interplay between spin, charge, and intense radiation fields with prospect applications in ultrafast magnetophotonics.

Publications (2^nd Funding Period 2022 - 2025)

• Photoinduced phases in jacutingaite monolayer
  M. Alipourzadeh, Y. Hajati, and J. Berakdar
  Phys. Rev. Res. 5, 043263 (2023) - DOI: 10.1103/PhysRevResearch.5.043263

• Controllable spin-split phantom scars in quantum dots
  M. Berger and J. Berakdar
  Adv. Quantum Technol. 6, 2200160 (2023) - DOI: 10.1002/qute.202200160

• Magnetoelectric tuning of spin, valley, and layer-resolved anomalous Nernst effect in transition-metal dichalcogenides bilayers
  Y. Hajati, M. Alipourzadeh, and J. Berakdar
  J. Phys.: Condens. Matter 35, 285602 (2023) - DOI: 10.1088/1361-648X/accc65

• Tuning layer-, perfect-spin-, and valley-polarized transport in transition-metal-dichalcogenide bilayer junctions
  Y. Hajati, M. Alipourzadeh, D. Schulz, and J. Berakdar
  Phys. Rev. Appl. 20, 024075 (2023) - DOI: 10.1103/PhysRevApplied.20.024075

• Electrically controlled entanglement of cavity photons with electromagnons 
  Z. Toklikishvili, L. Chotorlishvili, R. Khomeriki, V. Jandieri, and J. Berakdar  
  Phys. Rev. B 107, 115126 (2023)  - DOI: 10.1103/PhysRevB.107.115126

• Electric steering of spin excitation in nanostructured synthetic antiferromagnet
  X.-G. Wang, G. Guo, and J. Berakdar
  Adv. Electron. Mater. 9, 2300325 (2023) - DOI: 10.1063/5.0029523
• Floquet engineering the exceptional points in parity-time-symmetric magnonics
  X.-G. Wang, L.-L. Zeng, G. Guo, and J. Berakdar
  Phys. Rev. Lett. 131, 186705 (2023) - DOI: 10.1103/PhysRevLett.131.186705
• Steering skyrmions with microwave and terahertz electric pulses 
  X.-G. Wang, G.-H. Guo, V. K. Dugaev, J. Barnaś, J. Berakdar, S. S. P. Parkin, A. Ernst, and L. Chotorlishvili 
  Phys. Rev. B 107, 094404 (2023)  - DOI: 10.1103/PhysRevB.107.094404

• Magnonic Klein and acausal tunneling enabled by breaking the anti parity-time symmetry in antiferromagnets 
  S. Yuan, C. Sui, Z. Fan, J. Berakdar, D. Xue, and C. Jia 
  Commun. Phys. 6, 95 (2023)  - DOI: 10.1038/s42005-023-01222-z

• Impact of electron correlation on the light-induced demagnetization of elemental ferromagnetic metals 
  T. Barros, N. Tancogne-Dejean, J. Berakdar, and M. A. L. Marques
  European Phys. J. B 95, 175 (2022)  - DOI: 10.1140/epjb/s10051-022-00433-7

• Rectification of the spin Seebeck current in noncollinear antiferromagnets 
  L. Chotorlishvili, X.-G. Wang, A. Dyrdał, G.-H. Guo, V. K. Dugaev, J. Barnaś, and J. Berakdar 
  Phys. Rev. B 106, 014417 (2022)  - DOI: 10.1103/PhysRevB.106.014417

• Imaging and phase-locking of non-linear spin waves 
  R. Dreyer, A. F. Schäffer, H. G. Bauer, N. Liebing, J. Berakdar, and G. Woltersdorf 
  Nat. Commun. 13: 4939 (2022)  - DOI: 10.1038/s41467-022-32224-0

• Vortex ring and helical current formation in superconductors driven by a THz-field-induced toroidal vector potential 
  B. Niedzielski and J. Berakdar 
  Phys. Status Solidi B 259, 2100622 (2022)  - DOI: 10.1002/pssb.202100622
• Spatio-temporal superconducting dynamics driven by THz fields from topological spintronic terahertz emitters 
  B. Niedzielski, D. Schulz and J. Berakdar 
  Sci. Rep. 12, 15610 (2022)  - DOI: 10.1038/s41598-022-16377-y

• Nanostructured spintronic emitters for polarization-textured and chiral broadband THz fields 
  D. Schulz, B. Schwager, and J. Berakdar 
  ACS Photonics 9, 1248 (2022)  - DOI: 10.1021/acsphotonics.1c01693

• Emergent magnonic singularities in anti parity-time symmetric synthetic antiferromagnets 
  C.-W. Sui, S.-H. Yuan, X.-G. Wang, J. Berakdar, and C. Jia 
  New J. Phys. 24, 023031 (2022)  - DOI: 10.1088/1367-2630/ac52c1

• Light-induced magnetization at the nanoscale 
  J. Wätzel, P. R. Ribič, M. Coreno, M. B. Danailov, C. David, A. Demidovich, M. Di Fraia, L. Giannessi, K. Hansen, Š. Krušič, M. Manfredda, M. Meyer, A. Mihelič, N. Mirian, O. Plekan, B. Ressel, B. Rösner, A. Simoncig, S. Spampinati, M. Stupar, M. Žitnik, M. Zangrando, C. Callegari, J. Berakdar, and G. De Ninno 
  Phys. Rev. Lett. 128, 157205 (2022)  - DOI: 10.1103/PhysRevLett.128.157205

• Magnon dynamics in parity-time-symmetric dipolarly coupled waveguides and magnonic crystals 
  X.-G. Wang, D. Schulz, G.-H. Guo, and J. Berakdar 
  Phys. Rev. Appl. 18, 024080 (2022)  - DOI: 10.1103/PhysRevApplied.18.024080

• Standing spin wave excitation in Bi: YIG films via temperature-induced anisotropy changes and magneto-elastic coupling 
  S. P. Zeuschner, X.-G. Wang, M. Deb, E. Popova, G. Malinowski, M. Hehn, N. Keller, J. Berakdar, and M. Bargheer 
  Phys. Rev. B 106, 134401 (2022)  - DOI: 10.1103/PhysRevB.106.134401

Publications (1^st Funding Period 2018 - 2021)

• Nanoscale near-field steering of magnetic vortices 
  D. Yu, C. Sui, D. Schulz, J. Berakdar, and C. Jia
  Phys. Rev. Appl. 16, 034032 (2021)  - DOI: 10.1103/PhysRevApplied.16.034032

• Photonic signatures of spin-driven ferroelectricity in multiferroic dielectric oxides 
  V. Jandieri, R. Khomeriki, L. Chotorlishvili, K. Watanabe, D. Erni, D. H. Werner, and J. Berakdar
  Phys. Rev. Lett. 127, 127601 (2021)  - DOI: 10.1103/PhysRevLett.127.127601

• Chiral logic computing with twisted antiferromagnetic magnon modes 
  C. Jia, M. Chen, A. F. Schäffer, and J. Berakdar
  npj Comput. Mater. 7, 101 (2021)  - DOI: 10.1038/s41524-021-00570-0

• Spin-resolved quantum scars in confined spin-coupled two-dimensional electron gas 
  M. Berger, D. Schulz, and J. Berakdar
  Nanomaterials 11, 1258 (2021)  - DOI: 10.3390/nano11051258

• Enhanced sensitivity at magnetic high-order exceptional points and topological energy transfer in magnonic planar waveguides 
  X.-G. Wang, G.-H. Guo, and J. Berakdar
  Phys. Rev. Appl. 15, 034050 (2021)  - DOI: 10.1103/PhysRevApplied.15.034050

• Electron-magnon spin conversion and magnonic spin pumping inan antiferromagnet/heavy metal heterostructure 
  X.-G. Wang, Y.-Z. Nie, L. Chotorlishvili, Q.-L. Xia, J. Berakdar, and G.-H. Guo
  Phys. Rev. B 103, 064404 (2021)  - DOI: 10.1103/PhysRevB.103.064404

• Supercurrent induced by chiral coupling in multiferroic/superconductor nanostructures  
  B. Niedzielski, C. Jia, and J. Berakdar
  Nanomaterials 11, 184 (2021)  - DOI: 10.3390/nano11010184

• Electrons in intense laser fields with local phase, polarization, and skyrmionic textures
  J. Wätzel and J. Berakdar 
  Phys. Rev. A 102, 063105 (2020)  - DOI: 10.1103/PhysRevA.102.063105

• Rotating edge‑field driven processing of chiral spin textures in racetrack devices 
  A. F. Schäffer, P. Siegl, M. Stier, T. Posske, J. Berakdar, M. Thorwart, R. Wiesendanger, and E. Y. Vedmedenko 
  Sci. Rep. 10: 20400 (2020)  - DOI: 10.1038/s41598-020-77337-y

• Highly tunable spin-orbit torque and anisotropic magnetoresistance in a topological insulator thin film attached to ferromagnetic layer 
  A. G. Moghaddam, A. Qaiumzadeh, A. Dyrdał, and J. Berakdar 
  Phys. Rev. Lett. 125, 196801 (2020)  - DOI: 10.1103/PhysRevLett.125.196801

• Imprinting photon orbital angular momentum during laser-assisted photoemission from quantum wells 
  J. Wätzel, A. Blättermann, D. Schulz, C.-T. Chiang, and J. Berakdar 
  Opt. Lett. 45, 5970 (2020)  - DOI: 10.1364/OL.409206

• Photoelectric effect with a twist 
  G. De Ninno, J. Wätzel, P. R. Ribič, E. Allaria, M. Coreno, M. B. Danailov, C. David, A. Demidovich, M. Di Fraia, L. Giannessi, K. Hansen, Š. Krušič, M. Manfredda, M. Meyer, A. Mihelič, N. Mirian, O. Plekan, B. Ressel, B. Rösner, A. Simoncig, S. Spampinati, M. Stupar, M. Žitnik, M. Zangrando, C. Callegari, and J. Berakdar 
  Nat. Photonics 14, 554 (2020)  - DOI: 10.1038/s41566-020-0669-y

• Nondestructive ultrafast steering of a magnetic vortex by terahertz pulses 
  D. Yu, J. Kang, J. Berakdar, and C. L. Jia 
  NPG Asia Mater. 12: 36 (2020)  - DOI: 10.1038/s41427-020-0217-8

• Topological light fields for highly non-linear charge quantum dynamics and high harmonic generation 
  J. Wätzel and J. Berakdar 
  Opt. Express 28, 19469 (2020)  - DOI: 10.1364/OE.395590

• Stratonovich-Ito integration scheme in ultrafast spin caloritronics 
  L. Chotorlishvili, Z. Toklikishvili, X.-G. Wang, V. K. Dugaev, J. Barnaś, and J. Berakdar 
  Phys. Rev. B 102, 024413 (2020)  - DOI: 10.1103/PhysRevB.102.024413

• Twisting and tweezing the spin wave: on vortices, skyrmions, helical waves, and the magnonic spiral phase plate
  C. Jia, D. Ma, A. F. Schäffer, and J. Berakdar
  J. Opt. 21, 124001 (2019)  - DOI: 10.1088/2040-8986/ab4f8e

• Twisted magnon beams carrying orbital angular momentum
  C. Jia, D. Ma, A. F. Schäffer, and J. Berakdar
  Nat. Commun. 10:2077 (2019) - DOI: 10.1038/s41467-019-10008-3

• Electrical writing, deleting, reading, and moving of magnetic skyrmioniums in a racetrack device
  B. Göbel, A. F. Schäffer, J. Berakdar, I. Mertig, and S. S. P. Parkin
  Sci. Rep. 9, 12119 (2019)  - DOI: 10.1038/s41598-019-48617-z

• Time-resolved buildup of twisted indirect exchange interaction in two-dimensional systems 
  V. A. Stephanovich, E. V. Kirichenko, V. K. Dugaev, J. Barnaś, and J. Berakdar 
  Phys. Rev. B 99, 235302 (2019)  - DOI: 10.1103/PhysRevB.99.235302

• Influence of spin-orbit and spin-Hall effects on the spin-Seebeck current beyond linear response: A Fokker-Planck approach
  L. Chotorlishvili, Z. Toklikishvili, X.-G. Wang, V. K. Dugaev, J. Barnaś, and J. Berakdar
  Phys. Rev. B 99, 024410 (2019)  - DOI: 10.1103/PhysRevB.99.024410

• Thermoelastic enhancement of the magnonic spin Seebeck effect in thin films and bulk samples
  L. Chotorlishvili, X.-G. Wang, Z. Toklikishvili, and J. Berakdar 
  Phys. Rev. B 97, 144409 (2018)  - DOI: 10.1103/PhysRevB.97.144409

• Thermally induced spin polarization in a magnetized two-dimensional electron gas with Rashba spin-orbit interaction
  A. Dyrdał, J. Barnaś, V. K. Dugaev, and J. Berakdar
  Phys. Rev. B 98, 075307 (2018)  - DOI: 10.1103/PhysRevB.98.075307

• Magnetophononics: Ultrafast spin control through the lattice
  M. Fechner, A. Sukhov, L. Chotorlishvili, C. Kenel, J. Berakdar, and N. A. Spaldin
  Phys. Rev. Materials 2, 064401 (2018)  - DOI: 10.1103/PhysRevMaterials.2.064401

• Charge and spin currents in graphene generated by tailored light with orbital angular momentum
  M. Inglot, V. K. Dugaev, J. Berakdar, E. Y. Sherman, and J. Barnaś
  Appl. Phys. Lett. 112, 231102 (2018)  - DOI: 10.1063/1.5027667

• Radiation characteristics of nanoscopic structures driven by perfect optical vortex pulse
  M. Kraus, J. Wätzel, and J. Berakdar
  Opt. Commun. 427, 390 (2018)  - DOI: 10.1016/j.optcom.2018.06.083

• Anomalous Hall and Nernst effects in 2D systems: Role of cubic Rashba spin–orbit coupling
  A. Krzyżewska, A. Dyrdał, J. Barnaś, and J. Berakdar
  phys. stat. sol. (RRL) 12, 1800232 (2018)  - DOI: 10.1002/pssr.201800232

• Spin active split-ring resonator for THz high harmonic generation
  D. Schulze, J. Wätzel, and J. Berakdar
  Eur. Phys. J. B 91, 106 (2018)  - DOI: 10.1140/epjb/e2018-90142-5

• All-optical generation and ultrafast tuning of non-linear spin Hall current
  J. Wätzel and J. Berakdar
  Sci. Rep. 8:17102 (2018)  - DOI: 10.1038/s41598-018-35378-4

• Magnetoelectric response of quantum structures driven by optical vector beams
  J. Wätzel, C. M. Granados-Castro, and J. Berakdar
  Phys. Rev. B 99, 085425 (2019)  - DOI: 10.1103/PhysRevB.99.085425

• Electric field controlled spin waveguide phase shifter in YIG
  X.-G. Wang, L. Chotorlishvili, G.-H. Guo, and J. Berakdar 
  J. Appl. Phys. 124, 073903 (2018)  - DOI: 10.1063/1.5037958