Kink far below the Fermi level reveals new electron-magnon scattering channel in Fe
Many properties of real materials can be modeled using ab initio methods within a single-particle picture. However, for an accurate theoretical treatment of excited states, it is necessary to describe electron-electron correlations including interactions with bosons: phonons, plasmons, or magnons. I...
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| creator | Młyńczak, E M C T D Müller Gospodarič, P Heider, T Aguilera, I Bihlmayer, G Gehlmann, M Jugovac, M Zamborlini, G Tusche, C Suga, S Feyer, V Plucinski, L Friedrich, C Blügel, S Schneider, C M |
| description | Many properties of real materials can be modeled using ab initio methods within a single-particle picture. However, for an accurate theoretical treatment of excited states, it is necessary to describe electron-electron correlations including interactions with bosons: phonons, plasmons, or magnons. In this work, by comparing spin- and momentum-resolved photoemission spectroscopy measurements to many-body calculations carried out with a newly developed first-principles method, we show that a kink in the electronic band dispersion of a ferromagnetic material can occur at much deeper binding energies than expected (E_b=1.5 eV). We demonstrate that the observed spectral signature reflects the formation of a many-body state that includes a photohole bound to a coherent superposition of renormalized spin-flip excitations. The existence of such a many-body state sheds new light on the physics of the electron-magnon interaction which is essential in fields such as spintronics and Fe-based superconductivity. |
| doi_str_mv | 10.48550/arxiv.1808.02682 |
| format | Article |
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However, for an accurate theoretical treatment of excited states, it is necessary to describe electron-electron correlations including interactions with bosons: phonons, plasmons, or magnons. In this work, by comparing spin- and momentum-resolved photoemission spectroscopy measurements to many-body calculations carried out with a newly developed first-principles method, we show that a kink in the electronic band dispersion of a ferromagnetic material can occur at much deeper binding energies than expected (E_b=1.5 eV). We demonstrate that the observed spectral signature reflects the formation of a many-body state that includes a photohole bound to a coherent superposition of renormalized spin-flip excitations. The existence of such a many-body state sheds new light on the physics of the electron-magnon interaction which is essential in fields such as spintronics and Fe-based superconductivity.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.1808.02682</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Anomalies ; Bosons ; Electrons ; Ferromagnetic materials ; First principles ; Magnons ; Phonons ; Photoelectric emission ; Physics - Mesoscale and Nanoscale Physics ; Spintronics ; Superconductivity ; Superposition (mathematics)</subject><ispartof>arXiv.org, 2019-05</ispartof><rights>2019. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). 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The existence of such a many-body state sheds new light on the physics of the electron-magnon interaction which is essential in fields such as spintronics and Fe-based superconductivity.</description><subject>Anomalies</subject><subject>Bosons</subject><subject>Electrons</subject><subject>Ferromagnetic materials</subject><subject>First principles</subject><subject>Magnons</subject><subject>Phonons</subject><subject>Photoelectric emission</subject><subject>Physics - Mesoscale and Nanoscale Physics</subject><subject>Spintronics</subject><subject>Superconductivity</subject><subject>Superposition (mathematics)</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GOX</sourceid><recordid>eNotj01PwkAQhjcmJhLkB3hyE8_F7ewnR0NEiSQe5N5MlykUyxa3BfTfu4KXeQ_zvJN5GLvLxVg5rcUjxu_6OM6dcGMBxsEVG4CUeeYUwA0bdd1WiLSwoLUcsI-3OnzyCiMvqWlPvN8Qn1Hc1byhIzU8polNxwOdODXk-9iGbIfr0Abeeex7inVYc7_BEBJeh9S-ZddV6tDoP4dsOXteTl-zxfvLfPq0yFCDzTxYT95JXQmjrDUC0JBfQeWkXOUCNVrpNGlRKo8VaAQiWcq8NKoqlTNyyO4vZ8_GxT7WO4w_xZ95cTZPxMOF2Mf260BdX2zbQwzppwLEBKwCM7HyF0ySW2s</recordid><startdate>20190513</startdate><enddate>20190513</enddate><creator>Młyńczak, E</creator><creator>M C T D Müller</creator><creator>Gospodarič, P</creator><creator>Heider, T</creator><creator>Aguilera, I</creator><creator>Bihlmayer, G</creator><creator>Gehlmann, M</creator><creator>Jugovac, M</creator><creator>Zamborlini, G</creator><creator>Tusche, C</creator><creator>Suga, S</creator><creator>Feyer, V</creator><creator>Plucinski, L</creator><creator>Friedrich, C</creator><creator>Blügel, S</creator><creator>Schneider, C M</creator><general>Cornell University Library, arXiv.org</general><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>GOX</scope></search><sort><creationdate>20190513</creationdate><title>Kink far below the Fermi level reveals new electron-magnon scattering channel in Fe</title><author>Młyńczak, E ; 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| subjects | Anomalies Bosons Electrons Ferromagnetic materials First principles Magnons Phonons Photoelectric emission Physics - Mesoscale and Nanoscale Physics Spintronics Superconductivity Superposition (mathematics) |
| title | Kink far below the Fermi level reveals new electron-magnon scattering channel in Fe |
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