Optical spectroscopy of SmN: Locating the 4f conduction band
The rare-earth nitride ferromagnetic semiconductors owe their varying magnetic properties to the progressive filling of the 4f shell across the series. Recent electrical transport measurements on samarium nitride, including the observation of superconductivity, have been understood in terms of a con...
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| Veröffentlicht in: | Physical review. B 2019-05, Vol.99 (20), p.205131 |
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| container_title | Physical review. B |
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| creator | Holmes-Hewett, W F Buckley, R G Ruck, B J Natali, F Trodahl, H J |
| description | The rare-earth nitride ferromagnetic semiconductors owe their varying magnetic properties to the progressive filling of the 4f shell across the series. Recent electrical transport measurements on samarium nitride, including the observation of superconductivity, have been understood in terms of a contribution from a 4f transport channel. Band structure calculations generally locate an empty majority-spin 4f band within the conduction band although over a wide range of possible energies. Here we report optical reflection and transmission measurements on samarium nitride from 0.01 to 4 eV that demonstrate clearly that the 4f band forms the bottom of the conduction band. Results at the lowest energies show no free carrier absorption, indicating a semiconducting ground state, and support earlier conclusions based on transport measurements. |
| doi_str_mv | 10.1103/PhysRevB.99.205131 |
| format | Article |
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Recent electrical transport measurements on samarium nitride, including the observation of superconductivity, have been understood in terms of a contribution from a 4f transport channel. Band structure calculations generally locate an empty majority-spin 4f band within the conduction band although over a wide range of possible energies. Here we report optical reflection and transmission measurements on samarium nitride from 0.01 to 4 eV that demonstrate clearly that the 4f band forms the bottom of the conduction band. 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Results at the lowest energies show no free carrier absorption, indicating a semiconducting ground state, and support earlier conclusions based on transport measurements.</description><subject>Conduction bands</subject><subject>Ferromagnetism</subject><subject>Magnetic properties</subject><subject>Magnetic semiconductors</subject><subject>Nitrides</subject><subject>Optical reflection</subject><subject>Rare earth elements</subject><subject>Samarium</subject><subject>Superconductivity</subject><subject>Transport</subject><issn>2469-9950</issn><issn>2469-9969</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNo9jl1LwzAUhoMoOOb-gFcBrztPcpK0EW90OBWKEz-uR3qauo7Z1CYV9u8dKF69z9XzvIydC5gLAXj5vNnHF_99O7d2LkELFEdsIpWxmbXGHv-zhlM2i3ELAMKAzcFO2PWqTy25HY-9pzSESKHf89Dw18-nK14GcqntPnjaeK4aTqGrR0pt6HjluvqMnTRuF_3sb6fsfXn3tnjIytX94-KmzEiiTBlqLEShJBDmQmijBBrSRpNF18DhRqW9J1WBQ6x8DhoVgdKGClmL2gFO2cWvtx_C1-hjWm_DOHSH5FpKDboQMrf4AzPXSjQ</recordid><startdate>20190520</startdate><enddate>20190520</enddate><creator>Holmes-Hewett, W F</creator><creator>Buckley, R G</creator><creator>Ruck, B J</creator><creator>Natali, F</creator><creator>Trodahl, H J</creator><general>American Physical Society</general><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>H8D</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20190520</creationdate><title>Optical spectroscopy of SmN: Locating the 4f conduction band</title><author>Holmes-Hewett, W F ; Buckley, R G ; Ruck, B J ; Natali, F ; Trodahl, H J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c232t-353818420c3711564136c565c93af0709b5eec4b0a33be70534c0456c82d1da03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Conduction bands</topic><topic>Ferromagnetism</topic><topic>Magnetic properties</topic><topic>Magnetic semiconductors</topic><topic>Nitrides</topic><topic>Optical reflection</topic><topic>Rare earth elements</topic><topic>Samarium</topic><topic>Superconductivity</topic><topic>Transport</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Holmes-Hewett, W F</creatorcontrib><creatorcontrib>Buckley, R G</creatorcontrib><creatorcontrib>Ruck, B J</creatorcontrib><creatorcontrib>Natali, F</creatorcontrib><creatorcontrib>Trodahl, H J</creatorcontrib><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physical review. 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Band structure calculations generally locate an empty majority-spin 4f band within the conduction band although over a wide range of possible energies. Here we report optical reflection and transmission measurements on samarium nitride from 0.01 to 4 eV that demonstrate clearly that the 4f band forms the bottom of the conduction band. Results at the lowest energies show no free carrier absorption, indicating a semiconducting ground state, and support earlier conclusions based on transport measurements.</abstract><cop>College Park</cop><pub>American Physical Society</pub><doi>10.1103/PhysRevB.99.205131</doi></addata></record> |
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| ispartof | Physical review. B, 2019-05, Vol.99 (20), p.205131 |
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| language | eng |
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| source | American Physical Society Journals |
| subjects | Conduction bands Ferromagnetism Magnetic properties Magnetic semiconductors Nitrides Optical reflection Rare earth elements Samarium Superconductivity Transport |
| title | Optical spectroscopy of SmN: Locating the 4f conduction band |
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