Novel Spin-Based Building Blocks for Advanced TeraHertz Applications

Rezultaty

Characterization of the first generation pulsed THz emitters

Characterization of a first generation of active metallic THz emitters based on transition metal/heavy metal bilayers (typically Co/Pt bilayers) using terahertz time domain spectroscopy (TDS) with detected fields equivalent or larger to standard electro-optical materials. The output performances will be characterized in both reflection and transmission modes over the spectral bandwidth of the TDS system. The optimal parameters in terms of emitter growth, excitation powers and pulse width will be investigated.

Characterization of the first generation CW THz emitters

Building on the findings of D12 and continuing that work this report will give a detailed account of the characterization of continuouswave operation of the first generation of sTHz emitters by ultrafast photomixing of two detuned IR lasers The output performances will be investigated as a function of operation mode excitation power material system growth conditions etc CW emission beyond 2 THz is targeted with power levels that can be a stepping stone towards the levels needed for communication purposes at carrier frequencies beyond 24 THz

Characterization of spin-torque based structures for detectors

To understand the requirements for spintronic systems that can be used for emission and detection of THz the structural and magnetic properties will be characterized This includes in particular as the deliverable the information on the growth of the layers including the used parameters and the resulting structure such as crystallinity interface and surface properties etc For the magnetic characterization the typical characteristics will be provided including saturation magnetization anisotropies possible multilayer coupling strengths and measured spin torques

Experimental demonstration of novel spin-based THz ellipsometry configuration

We will report on the demonstration of ellipsometric measurement configuration with spin-sensitive THz components. Complete Mueller (Jones) matrix will be measured based on the switching of selected polarization states by spin reorientation and precise calibration procedure. The report will include demonstration of THz ellipsometric spectra measurement on typical isotropic/anisotropic samples including the analysis of experimental errors.

Performance assessment of polarization and modulation control

This report will summarize experimental results on the polarization properties and the parameters of emitted light from spintronic THz devices. The THz light polarization switching and modulation, by external magnetic field, will be tested and the polarization accuracy and stability will be measured as a function of various polarization state and emitter architecture. Parameters for different polarization states will be reported.

Report on ab-initio modelling for spin-based THz emitters

We report on ab-initio calculations of the decisive materials’ quantities (e.g. spin-Hall and Rashba-Edelstein coefficients), and the study of symmetry-breaking effect at interfaces (e.g. Fe/Bi) and in selected AFMs (e.g. Mn2Au, CuMnAs without inversion symmetry) that lead to spin-to-charge conversion. Further we report modelling of superdiffusive spin currents for spin-based THz emitters.

Report on the demodulation specifications

This report will give an account of the experimental and theoretical work during the first 3 project years to demonstrate the feasibility of spin-based heterostructures as wide-band THz receivers.The objectives are to demonstrate demodulation of any modulated THz signal using spin physics. The Report will follow the structure of the detectors demonstrated in T2.1-3 and for each of them investigate bandwidth, responsivity, noise characteristics (NEP, noise figure, …), etc. An outlook will be presented to the use of the spin technology in THz links.

Project website/logo launching

Creation of the website and the logo of the project and putting on line of the website.

Set-up the Data Management Plan (DMP)

The consortium will exhaustively explain the management of their data. The objective is to set up common practices so that the consortium and later on related communities can share their results in a simple and direct fashion. The consortium will update its data policy regarding the evolvement of the EU Open Science Cloud (EOSC37) initiative for FAIR (Findable, Accessible, Interoperable, Reusable) data.

Publikacje

Fiber-tip spintronic terahertz emitters

Autorzy: Felix Paries; Nicolas Tiercelin; Geoffrey Lezier; Mathias Vanwolleghem; Felix Selz; Maria-Andromachi Syskaki; Fabian Kammerbauer; Gerhard Jakob; Martin Jourdan; Mathias Kläui; Zdenek Kaspar; Tobias Kampfrath; Tom S. Seifert; Georg von Freymann; Daniel Molter
Opublikowane w: Optics Express, Numer 23, 2023, ISSN 1094-4087
Wydawca: Optical Society of America
DOI: 10.1364/oe.494623

Identification of Néel Vector Orientation in Antiferromagnetic Domains Switched by Currents in Ni O / Pt Thin Films

Autorzy: C. Schmitt; Lorenzo Baldrati; Luis Sanchez-Tejerina; Felix Schreiber; Andrew Ross; M. Filianina; Shilei Ding; Shilei Ding; Felix Fuhrmann; Rafael Ramos; Francesco Maccherozzi; Dirk Backes; M.-A. Mawass; Florian Kronast; Sergio Valencia; Eiji Saitoh; Giovanni Finocchio; Mathias Kläui
Opublikowane w: PHYSICAL REVIEW APPLIED, Numer Phys. Rev. Applied 15, 034047 – Published 16 March 2021, 2021, ISSN 2331-7019
Wydawca: American Physical Society
DOI: 10.1103/physrevapplied.15.034047

Ultrafast carrier dynamics in terahertz photoconductors and photomixers: beyond short-carrier-lifetime semiconductors

Autorzy: Ping-Keng Lu; Anuar de Jesus Fernandez Olvera; Deniz Turan; Tom Sebastian Seifert; Nezih Tolga Yardimci; Tobias Kampfrath; Sascha Preu; Mona Jarrahi
Opublikowane w: Nanophotonics, Numer 8, 2023, ISSN 2192-8614
Wydawca: De Gruyter
DOI: 10.1515/nanoph-2021-0785

Spintronic sources of ultrashort terahertz electromagnetic pulses

Autorzy: Seifert, Tom S.; Cheng, Liang; Wei, Zhengxing; Kampfrath, Tobias; Qi, Jingbo
Opublikowane w: Applied Physics Letters, Numer 3, 2022, ISSN 0003-6951
Wydawca: American Institute of Physics
DOI: 10.1063/5.0080357

Ultrafast coherent all-optical switching of an antiferromagnet with the inverse Faraday effect

Autorzy: Tobias Dannegger; Marco Berritta; Karel Carva; Severin Selzer; Ulrike Ritzmann; Ulrike Ritzmann; Peter M. Oppeneer; Ulrich Nowak
Opublikowane w: PHYSICAL REVIEW B, Numer Phys. Rev. B 104, L060413 – Published 30 August 2021, 2021, ISSN 2469-9950
Wydawca: American Physical Society
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Current induced switching in Mn2Au from first principles

Autorzy: Selzer, Severin; Salemi, Leandro; Deák, András; Simon, Eszter; Szunyogh, László; Oppeneer, Peter M.; Nowak, Ulrich
Opublikowane w: Physical Review B, Numer 6, 2022, ISSN 2469-9969
Wydawca: American Physical Society
DOI: 10.48550/arxiv.2201.13137

Ultrafast Spin‐Charge Conversion at SnBi 2 Te 4 /Co Topological Insulator Interfaces Probed by Terahertz Emission Spectroscopy

Autorzy: E. Rongione; S. Fragkos; L. Baringthon; J. Hawecker; E. Xenogiannopoulou; P. Tsipas; C. Song; M. Mičica; J. Mangeney; J. Tignon; T. Boulier; N. Reyren; R. Lebrun; J.‐M. George; P. Le Fèvre; S. Dhillon; A. Dimoulas; H. Jaffrès
Opublikowane w: Advanced Optical Materials, Numer 21951071, 2022, ISSN 2195-1071
Wydawca: Wiley
DOI: 10.1002/adom.202102061

First-principles theory of intrinsic spin and orbital Hall and Nernst effects in metallic monoatomic crystals

Autorzy: Leandro Salemi; Peter M. Oppeneer
Opublikowane w: Physical Review B, Numer 8, 2022, ISSN 2469-9969
Wydawca: APS
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Emission of coherent THz magnons in an antiferromagnetic insulator triggered by ultrafast spin–phonon interactions

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Room-Temperature Antiferromagnetic Resonance and Inverse Spin-Hall Voltage in Canted Antiferromagnets

Autorzy: Isabella Boventer; Haakon T. Simensen; Abdelmadjid Anane; Mathias Kläui; Mathias Kläui; Arne Brataas; Romain Lebrun
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Magnetic properties of hematite revealed by an ab initio parameterized spin model

Autorzy: Tobias Dannegger; András Deák; Levente Rózsa; E. Galindez-Ruales; Shubhankar Das; Eunchong Baek; Mathias Kläui; László Szunyogh; Ulrich Nowak
Opublikowane w: Physical Review B, Numer 8, 2023, ISSN 2469-9969
Wydawca: APS
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Readout of an antiferromagnetic spintronics system by strong exchange coupling of Mn2Au and Permalloy

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Modulating the polarization of broadband terahertz pulses from a spintronic emitter at rates up to 10 kHz

Autorzy: Oliver Gueckstock; Lukas Nadvornik; Tom Seifert; Martin Borchert; Gerhard Jakob; Georg Schmidt; Georg Woltersdorf; Mathias Kläui; Martin Wolf; Tobias Kampfrath
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Frequency-Independent Terahertz Anomalous Hall Effect in DyCo5, Co32Fe68, and Gd27Fe73 Thin Films from DC to 40 THz

Autorzy: Tom S. Seifert, Ulrike Martens, Florin Radu, Mirkow Ribow, Marco Berritta, Lukáš Nádvorník, Ronald Starke,Tomas Jungwirth, Martin Wolf, Ilie Radu, Markus Münzenberg, Peter M. Oppeneer, Georg Woltersdorf, Tobias Kampfrath
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Wydawca: United Nations Industrial Developement Organization
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MAELASviewer: An Online Tool to Visualize Magnetostriction

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Wydawca: John Wiley & Sons
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Theory of superdiffusive spin transport in noncollinear magnetic multilayers

Autorzy: Pavel Baláž; Maciej Zwierzycki; Francesco Cosco; Karel Carva; Pablo Maldonado; Peter M. Oppeneer
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Time-domain observation of ballistic orbital-angular-momentum currents with giant relaxation length in tungsten

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Optically-triggered strain-driven Néel vector manipulation in a metallic antiferromagnet

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Spin‐Momentum Locking and Ultrafast Spin‐Charge Conversion in Ultrathin Epitaxial Bi1 − xSbx Topological Insulator

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Direct Imaging of Current-Induced Antiferromagnetic Switching Revealing a Pure Thermomagnetoelastic Switching Mechanism in NiO

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Quantitative comparison of spin and orbital Hall and Rashba-Edelstein effects in heavy-metal/3d-metal bilayers

Autorzy: Leandro Salemi, Marco Berritta, Peter M. Oppeneer
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Wydawca: APS
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Broadband Spintronic Detection of the Absolute Field Strength of Terahertz Electromagnetic Pulses

Autorzy: A.L. Chekhov; Y. Behovits; U. Martens; B.R. Serrano; M. Wolf; T.S. Seifert; M. Münzenberg; T. Kampfrath
Opublikowane w: Physical Review Applied, Numer 4, 2023, ISSN 2331-7019
Wydawca: APS
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360° polarization control of terahertz spintronic emitters using uniaxial FeCo/TbCo 2 /FeCo trilayers

Autorzy: Pierre Koleják; Geoffrey Lezier; Kamil Postava; Jean-François Lampin; Nicolas Tiercelin; Mathias Vanwolleghem
Opublikowane w: ACS photonics, Numer 2, 2022, ISSN 2330-4022
Wydawca: American Chemical Society
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Long-distance spin-transport across the Morin phase transition up to room temperature in ultra-low damping single crystals of the antiferromagnet α-Fe2O3

Autorzy: R. Lebrun, A. Ross, O. Gomonay, V. Baltz, U. Ebels, A.-L. Barra, A. Qaiumzadeh, A. Brataas, J. Sinova, M. Kläui
Opublikowane w: Nature Communications, Numer 11/1, 2020, ISSN 2041-1723
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Mechanism of electrical switching of ultra-thin CoO/Pt bilayers

Autorzy: Schmitt, Christin; Rajan, Adithya; Beneke, Grischa; Kumar, Aditya; Sparmann, Tobias; Meer, Hendrik; Bednarz, Beatrice; Ramos, Rafael; Nino, Miguel Angel; Foerster, Michael; Saitoh, Eiji; Kläui, Mathias
Opublikowane w: Nanoletters, Numer 8, 2024, ISSN 1530-6984
Wydawca: American Chemical Society
DOI: 10.48550/arxiv.2303.13308

Antiferromagnetic insulatronics: Spintronics in insulating 3d metal oxides with antiferromagnetic coupling

Autorzy: H. Meer; O. Gomonay; A. Wittmann; M. Kläui
Opublikowane w: Applied Physics Letters, Numer 9, 2023, ISSN 1077-3118
Wydawca: AIP
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Exceptional sign changes of the nonlocal spin Seebeck effect in antiferromagnetic hematite

Autorzy: Andrew Ross; Romain Lebrun; Martin Evers; A. Deák; László Szunyogh; Ulrich Nowak; Mathias Kläui; Mathias Kläui
Opublikowane w: PHYSICAL REVIEW B, Numer Phys. Rev. B 103, 224433 – Published 24 June 2021, 2021, ISSN 2469-9950
Wydawca: American Physical Society
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Magnetic sensitivity distribution of Hall devices in antiferromagnetic switching experiments

Autorzy: F. Schreiber; H. Meer; C. Schmitt; R. Ramos; E. Saitoh; L. Baldrati; M. Kläui
Opublikowane w: Physical Review Applied, Numer Phys. Rev. Applied 16, 064023 – Published 9 December 2021, 2021, ISSN 1536-6065
Wydawca: American Physical Society
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Antiferromagnetic Cavity Magnon Polaritons in Collinear and Canted Phases of Hematite

Autorzy: I. Boventer; H. T. Simensen; B. Brekke; M. Weides; A. Anane; M. Kläui; A. Brataas; R. Lebrun
Opublikowane w: Physical Review Applied, Numer 25, 2023, ISSN 2331-7019
Wydawca: APS
DOI: 10.1103/physrevapplied.19.014071

Nonlinear terahertz N\'eel spin-orbit torques in antiferromagnetic Mn$_2$Au

Autorzy: Behovits, Yannic; Chekhov, Alexander L.; Bodnar, Stanislav Yu.; Gueckstock, Oliver; Reimers, Sonka; Seifert, Tom S.; Wolf, Martin; Gomonay, Olena; Kläui, Mathias; Jourdan, Martin; Kampfrath, Tobias
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Average power scaling of THz spintronic emitters in reflection geometry

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Current-induced switching of antiferromagnetic order in Mn2Au from first principles

Autorzy: Severin Selzer, Leandro Salemi, András Deák, Eszter Simon, László Szunyogh, Peter M. Oppeneer, and Ulrich Nowak
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Theory of magnetic spin and orbital Hall and Nernst effects in bulk ferromagnets

Autorzy: Leandro Salemi; Peter M. Oppeneer
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Wydawca: American Physical Society
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"Néel vector switching and terahertz spin-wave excitation in <mml:math xmlns:mml=""http://www.w3.org/1998/Math/MathML""><mml:mrow><mml:msub><mml:mi>Mn</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>Au</mml:mi></mml:mrow></mml:math> due to femtosecond spin-transfer torques"

Autorzy: Markus Weißenhofer; Francesco Foggetti; Ulrich Nowak; Peter M. Oppeneer
Opublikowane w: Physical Review B, Numer 3, 2023, ISSN 2469-9969
Wydawca: American Physical Society
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Magnon transport in the presence of antisymmetric exchange in a weak antiferromagnet

Autorzy: Andrew Ross; Romain Lebrun; Olena Gomonay; Jairo Sinova; Asaf Kay; Daniel A. Grave; Avner Rothschild; Mathias Kläui; Mathias Kläui
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Ultrafast spin-currents and charge conversion at 3 d -5 d interfaces probed by time-domain terahertz spectroscopy

Autorzy: T. H. Dang, J. Hawecker, E. Rongione, G. Baez Flores, D. Q. To, J. C. Rojas-Sanchez, H. Nong, J. Mangeney, J. Tignon, F. Godel, S. Collin, P. Seneor, M. Bibes, A. Fert, M. Anane, J.-M. George, L. Vila, M. Cosset-Cheneau, D. Dolfi, R. Lebrun, P. Bortolotti, K. Belashchenko, S. Dhillon, H. Jaffrès
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Effective strain manipulation of the antiferromagnetic state of polycrystalline NiO

Autorzy: Anthony Barra; Andrew Ross; Olena Gomonay; Lorenzo Baldrati; Andres C. Chavez; Romain Lebrun; Romain Lebrun; Joseph D. Schneider; Paymon Shirazi; Qianchang Wang; Jairo Sinova; Gregory P. Carman; Mathias Kläui; Mathias Kläui
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Wydawca: American Institute of Physics
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Ultrafast and terahertz spintronics: Guest editorial

Autorzy: Tobias Kampfrath; Andrei Kirilyuk; Stéphane Mangin; Sangeeta Sharma; Martin Weinelt
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Autorzy: Mariusz Drong; Maciej Dems; Jan Perina; Tibor Fordos; Henri Yves Jaffres; Kamil Postava; Henri-Jean Drouhin
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Concurrent magneto-optical imaging and magneto-transport readout of electrical switching of insulating antiferromagnetic thin films

Autorzy: F. Schreiber, L. Baldrati, C. Schmitt, R. Ramos, E. Saitoh, R. Lebrun, M. Kläui
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Wydawca: American Institute of Physics
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Commensurability between Element Symmetry and the Number of Skyrmions Governing Skyrmion Diffusion in Confined Geometries

Autorzy: Chengkun Song; Chengkun Song; Nico Kerber; Jan Rothörl; Yuqing Ge; Klaus Raab; Boris Seng; Boris Seng; Maarten A. Brems; Florian Dittrich; Robert M. Reeve; Jianbo Wang; Qingfang Liu; Peter Virnau; Mathias Kläui
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Advances in Magnetics : Roadmap on Spin-Wave Computing

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Optics Express

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First-principles theory of electrically-induced spin and orbital magnetization

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