Measuring anisotropic spin relaxation in graphene
We compare different methods to measure the anisotropy of the spin-lifetime in graphene. In addition to out-of-plane rotation of the ferromagnetic electrodes and oblique spin precession, we present a Hanle experiment where the electron spins precess around either a magnetic field perpendicular to th...
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| creator | Ringer, Sebastian Hartl, Stefan Rosenauer, Matthias Völkl, Tobias Kadur, Maximilian Hopperdietzel, Franz Weiss, Dieter Eroms, Jonathan |
| description | We compare different methods to measure the anisotropy of the spin-lifetime in graphene. In addition to out-of-plane rotation of the ferromagnetic electrodes and oblique spin precession, we present a Hanle experiment where the electron spins precess around either a magnetic field perpendicular to the graphene plane or around an in-plane field. In the latter case, electrons are subject to both in-plane and out-of-plane spin relaxation. To fit the data, we use a numerical simulation that can calculate precession with anisotropies in the spin-lifetimes under magnetic fields in any direction. Our data show a small, but distinct anisotropy that can be explained by the combined action of isotropic mechanisms, such as relaxation by the contacts and resonant scattering by magnetic impurities, and an anisotropic Rashba spin-orbit based mechanism. We also assess potential sources of error in all three types of experiment and conclude that the in-plane/out-of-plane Hanle method is most reliable. |
| doi_str_mv | 10.48550/arxiv.1711.06472 |
| format | Article |
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In addition to out-of-plane rotation of the ferromagnetic electrodes and oblique spin precession, we present a Hanle experiment where the electron spins precess around either a magnetic field perpendicular to the graphene plane or around an in-plane field. In the latter case, electrons are subject to both in-plane and out-of-plane spin relaxation. To fit the data, we use a numerical simulation that can calculate precession with anisotropies in the spin-lifetimes under magnetic fields in any direction. Our data show a small, but distinct anisotropy that can be explained by the combined action of isotropic mechanisms, such as relaxation by the contacts and resonant scattering by magnetic impurities, and an anisotropic Rashba spin-orbit based mechanism. 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We also assess potential sources of error in all three types of experiment and conclude that the in-plane/out-of-plane Hanle method is most reliable.</description><subject>Anisotropy</subject><subject>Computer simulation</subject><subject>Electron spin</subject><subject>Electrons</subject><subject>Ferromagnetism</subject><subject>Graphene</subject><subject>Magnetic fields</subject><subject>Measurement methods</subject><subject>Physics - Mesoscale and Nanoscale Physics</subject><subject>Precession</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</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>eNotj01Lw0AURQdBsNT-AFcGXCfOe5PJmyyl-FGouOk-PDOTOqVO4kwq9d8bW1eXC4fLPULcgCxKo7W853j03wUQQCGrkvBCzFApyE2JeCUWKe2klFgRaq1mAl4dp0P0YZtx8KkfYz_4NkuDD1l0ez7y6PuQTW0befhwwV2Ly473yS3-cy42T4-b5Uu-fnteLR_WOWvEHMCSfHdkDbCFqoWW0QB1XW11KbuuxVYhktEWeKpINdWWrCSwmhmcmovb8-zJpxmi_-T40_x5NSevibg7E0Psvw4ujc2uP8QwfWpQkjK6NBP1C7o5T_Q</recordid><startdate>20180511</startdate><enddate>20180511</enddate><creator>Ringer, Sebastian</creator><creator>Hartl, Stefan</creator><creator>Rosenauer, Matthias</creator><creator>Völkl, Tobias</creator><creator>Kadur, Maximilian</creator><creator>Hopperdietzel, Franz</creator><creator>Weiss, Dieter</creator><creator>Eroms, Jonathan</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>20180511</creationdate><title>Measuring anisotropic spin relaxation in graphene</title><author>Ringer, Sebastian ; Hartl, Stefan ; Rosenauer, Matthias ; Völkl, Tobias ; Kadur, Maximilian ; Hopperdietzel, Franz ; Weiss, Dieter ; Eroms, Jonathan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a522-11d70be7d81ad16c1ca2817ff9d540ffc2c322785d1a0ff27979d7d071d5aa1e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Anisotropy</topic><topic>Computer simulation</topic><topic>Electron spin</topic><topic>Electrons</topic><topic>Ferromagnetism</topic><topic>Graphene</topic><topic>Magnetic fields</topic><topic>Measurement methods</topic><topic>Physics - Mesoscale and Nanoscale Physics</topic><topic>Precession</topic><toplevel>online_resources</toplevel><creatorcontrib>Ringer, Sebastian</creatorcontrib><creatorcontrib>Hartl, Stefan</creatorcontrib><creatorcontrib>Rosenauer, Matthias</creatorcontrib><creatorcontrib>Völkl, Tobias</creatorcontrib><creatorcontrib>Kadur, Maximilian</creatorcontrib><creatorcontrib>Hopperdietzel, Franz</creatorcontrib><creatorcontrib>Weiss, Dieter</creatorcontrib><creatorcontrib>Eroms, Jonathan</creatorcontrib><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni)</collection><collection>ProQuest Central</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Publicly Available Content Database (Proquest) (PQ_SDU_P3)</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering collection</collection><collection>arXiv.org</collection><jtitle>arXiv.org</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ringer, Sebastian</au><au>Hartl, Stefan</au><au>Rosenauer, Matthias</au><au>Völkl, Tobias</au><au>Kadur, Maximilian</au><au>Hopperdietzel, Franz</au><au>Weiss, Dieter</au><au>Eroms, Jonathan</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Measuring anisotropic spin relaxation in graphene</atitle><jtitle>arXiv.org</jtitle><date>2018-05-11</date><risdate>2018</risdate><eissn>2331-8422</eissn><abstract>We compare different methods to measure the anisotropy of the spin-lifetime in graphene. In addition to out-of-plane rotation of the ferromagnetic electrodes and oblique spin precession, we present a Hanle experiment where the electron spins precess around either a magnetic field perpendicular to the graphene plane or around an in-plane field. In the latter case, electrons are subject to both in-plane and out-of-plane spin relaxation. To fit the data, we use a numerical simulation that can calculate precession with anisotropies in the spin-lifetimes under magnetic fields in any direction. Our data show a small, but distinct anisotropy that can be explained by the combined action of isotropic mechanisms, such as relaxation by the contacts and resonant scattering by magnetic impurities, and an anisotropic Rashba spin-orbit based mechanism. 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| subjects | Anisotropy Computer simulation Electron spin Electrons Ferromagnetism Graphene Magnetic fields Measurement methods Physics - Mesoscale and Nanoscale Physics Precession |
| title | Measuring anisotropic spin relaxation in graphene |
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