Search Results - "Berakdar, Jamal"

Twisted magnon beams carrying orbital angular momentum by Jia, Chenglong, Ma, Decheng, Schäffer, Alexander F., Berakdar, Jamal

“…Low-energy eigenmode excitations of ferromagnets are spin waves or magnons that can be triggered and guided in magnonic circuits without Ohmic losses and hence…”
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Steering magnonic dynamics and permeability at exceptional points in a parity–time symmetric waveguide by Wang, Xi-guang, Guo, Guang-hua, Berakdar, Jamal

“…Tuning the magneto optical response and magnetic dynamics are key elements in designing magnetic metamaterials and devices. This theoretical study uncovers a…”
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Topological light fields for highly non-linear charge quantum dynamics and high harmonic generation by Wätzel, Jonas, Berakdar, Jamal

“…We study theoretically the electron quantum dynamics in atoms driven by intense IR laser pulses that are phase and/or polarization structured. The extremely…”
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Ultrafast coupled charge and spin dynamics in strongly correlated NiO by Gillmeister, Konrad, Golež, Denis, Chiang, Cheng-Tien, Bittner, Nikolaj, Pavlyukh, Yaroslav, Berakdar, Jamal, Werner, Philipp, Widdra, Wolf

“…Charge excitations across an electronic band gap play an important role in opto-electronics and light harvesting. In contrast to conventional semiconductors,…”
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Electrical writing, deleting, reading, and moving of magnetic skyrmioniums in a racetrack device by Göbel, Börge, Schäffer, Alexander F., Berakdar, Jamal, Mertig, Ingrid, Parkin, Stuart S. P.

“…A magnetic skyrmionium (also called 2 π -skyrmion) can be understood as a skyrmion—a topologically nontrivial magnetic whirl—which is situated in the center of…”
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Electric steering of spin excitation in nanostructured synthetic antiferromagnet by Wang, Xi-Guang, Guo, Guang-Hua, Berakdar, Jamal

“…Two or more ferromagnetic layers separated by metallic nanoscale spacers may couple antiferromagnetically forming a synthetic antiferromagnet (SAF) with…”
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All-optical generation and ultrafast tuning of non-linear spin Hall current by Wätzel, Jonas, Berakdar, Jamal

“…Spin Hall effect, one of the cornerstones in spintronics refers to the emergence of an imbalance in the spin density transverse to a charge flow in a sample…”
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Spatio-temporal superconducting dynamics driven by THz fields from topological spintronic terahertz emitters by Niedzielski, Björn, Schulz, Dominik, Berakdar, Jamal

“…Metastructures of spintronic THz emitters can be engineered to have a well-defined topology characterized by a topological charge. The emitted THz radiation…”
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Generation, electric detection, and orbital-angular momentum tunneling of twisted magnons by Chen, Min, Schäffer, Alexander F., Berakdar, Jamal, Jia, Chenglong

“…A scheme for generating twisted magnons that carry orbital angular momentum in ferromagnetic nanodisks is presented. The topological signature of these…”
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Ultrafast entanglement switching and singlet–triplet transitions control via structured terahertz pulses by Wätzel, Jonas, Berakdar, Jamal, Sherman, E Ya

“…Terahertz (THz) vector beams with spatially textured polarization are proposed to steer the spin and spatial distributions of two interacting electrons in a…”
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Photoelectric effect with a twist by De Ninno, Giovanni, Wätzel, Jonas, Ribič, Primož Rebernik, Allaria, Enrico, Coreno, Marcello, Danailov, Miltcho B., David, Christian, Demidovich, Alexander, Di Fraia, Michele, Giannessi, Luca, Hansen, Klavs, Krušič, Špela, Manfredda, Michele, Meyer, Michael, Mihelič, Andrej, Mirian, Najmeh, Plekan, Oksana, Ressel, Barbara, Rösner, Benedikt, Simoncig, Alberto, Spampinati, Simone, Stupar, Matija, Žitnik, Matjaž, Zangrando, Marco, Callegari, Carlo, Berakdar, Jamal

“…Photons have fixed spin and unbounded orbital angular momentum (OAM). While the former is manifested in the polarization of light, the latter corresponds to…”
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Functional all-optical logic gates for true time-domain signal processing in nonlinear photonic crystal waveguides by Jandieri, Vakhtang, Khomeriki, Ramaz, Onoprishvili, Tornike, Werner, Douglas H., Berakdar, Jamal, Erni, Daniel

“…We present a conceptual study on the realization of functional and easily scalable all-optical NOT, AND and NAND logic gates using bandgap solitons in coupled…”
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Imaging and phase-locking of non-linear spin waves by Dreyer, Rouven, Schäffer, Alexander F., Bauer, Hans G., Liebing, Niklas, Berakdar, Jamal, Woltersdorf, Georg

“…Non-linear processes are a key feature in the emerging field of spin-wave based information processing and allow to convert uniform spin-wave excitations into…”
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Impact of electron correlation on the light-induced demagnetization of elemental ferromagnetic metals by Barros, Tomás, Tancogne-Dejean, Nicolas, Berakdar, Jamal, Marques, Miguel A. L.

“…The local spin-density approximation (LSDA) is known to describe poorly the electronic structure of 3 d transition metals, yet most density-functional-based…”
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Chiral logic computing with twisted antiferromagnetic magnon modes by Jia, Chenglong, Chen, Min, Schäffer, Alexander F., Berakdar, Jamal

“…Antiferromagnetic (AFM) materials offer an exciting platform for ultrafast information handling with low cross-talks and compatibility with existing…”
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Nondestructive ultrafast steering of a magnetic vortex by terahertz pulses by Yu, Dongxing, Kang, Jiyong, Berakdar, Jamal, Jia, Chenglong

“…Electric control of magnetic vortex dynamics in a reproducible way on an ultrafast time scale is a key element in the quest for efficient spintronic devices…”
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Rotating edge-field driven processing of chiral spin textures in racetrack devices by Schäffer, Alexander F., Siegl, Pia, Stier, Martin, Posske, Thore, Berakdar, Jamal, Thorwart, Michael, Wiesendanger, Roland, Vedmedenko, Elena Y.

“…Topologically distinct magnetic structures like skyrmions, domain walls, and the uniformly magnetized state have multiple applications in logic devices,…”
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Emergent magnonic singularities in anti parity-time symmetric synthetic antiferromagnets by Sui, Chao-Wei, Yuan, Shao-Hua, Wang, Xi-Guang, Berakdar, Jamal, Jia, Chenglong

“…We study the impact of the transition across the anti-parity-time (anti- PT ) symmetry breaking point on the low-energy spin excitations in a synthetic…”
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Stochastic dynamics and pattern formation of geometrically confined skyrmions by Schäffer, Alexander F., Rózsa, Levente, Berakdar, Jamal, Vedmedenko, Elena Y., Wiesendanger, Roland

“…Ensembles of magnetic skyrmions in confined geometries are shown to exhibit thermally driven motion on two different time scales. The intrinsic fluctuating…”
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Quantum teleportation by utilizing helical spin chains for sharing entanglement by Verma, Harshit, Chotorlishvili, Levan, Berakdar, Jamal, Mishra, Sunil Kumar

“…We develop a new protocol for sharing entanglement (one ebit) between two parties using the natural dynamics of helical multiferroic spin chains. We introduce…”
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