The half-metallicity and the spin filtering, NDR and spin Seebeck effects in 2D Ag-doped SnSe2 monolayer
Two-dimensional SnSe2 has become more and more attractive due to the excellent electronic, optoelectronic, and thermoelectric properties. However, the study on magnetic properties is rare. Inspired by the recent experimental synthesis of SnSe2 monolayer and Ag-doped SnSe2 thin films, we use the firs...
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Veröffentlicht in: | The Journal of chemical physics 2019-02, Vol.150 (6), p.064701-064701 |
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creator | Wu, Xuming Xiong, Lun Feng, Yulin Wang, Cong Gao, Guoying |
description | Two-dimensional SnSe2 has become more and more attractive due to the excellent electronic, optoelectronic, and thermoelectric properties. However, the study on magnetic properties is rare. Inspired by the recent experimental synthesis of SnSe2 monolayer and Ag-doped SnSe2 thin films, we use the first-principles calculations combined with the nonequilibrium Green’s function method to investigate the structural, electronic, magnetic, and spin transport properties of an Ag-doped SnSe2 monolayer. It is found that the doped system exhibits half-metallic ferromagnetism with the energy gap of about 0.5 eV in the spin-down channel. The spin-polarized transport properties based on Ag-doped SnSe2 monolayers show an excellent spin filtering effect and a negative differential resistance effect under a bias voltage. Interestingly, under a temperature gradient, the spin Seebeck effect and the temperature-controlled reverse of spin polarization are also observed. These perfect spin transport properties can be understood from the calculated spin-polarized band structure and the spin-polarized transport spectrum. These studies indicate the potential spintronic and spin caloritronic applications for Ag-doped SnSe2 monolayer. |
doi_str_mv | 10.1063/1.5064759 |
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However, the study on magnetic properties is rare. Inspired by the recent experimental synthesis of SnSe2 monolayer and Ag-doped SnSe2 thin films, we use the first-principles calculations combined with the nonequilibrium Green’s function method to investigate the structural, electronic, magnetic, and spin transport properties of an Ag-doped SnSe2 monolayer. It is found that the doped system exhibits half-metallic ferromagnetism with the energy gap of about 0.5 eV in the spin-down channel. The spin-polarized transport properties based on Ag-doped SnSe2 monolayers show an excellent spin filtering effect and a negative differential resistance effect under a bias voltage. Interestingly, under a temperature gradient, the spin Seebeck effect and the temperature-controlled reverse of spin polarization are also observed. These perfect spin transport properties can be understood from the calculated spin-polarized band structure and the spin-polarized transport spectrum. These studies indicate the potential spintronic and spin caloritronic applications for Ag-doped SnSe2 monolayer.</description><identifier>ISSN: 0021-9606</identifier><identifier>EISSN: 1089-7690</identifier><identifier>DOI: 10.1063/1.5064759</identifier><identifier>CODEN: JCPSA6</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Electron spin ; Energy gap ; Ferromagnetism ; Filtration ; First principles ; Magnetic properties ; Mathematical analysis ; Metallicity ; Monolayers ; Optoelectronics ; Polarization (spin alignment) ; Seebeck effect ; Silver ; Temperature gradients ; Thin films ; Transport properties</subject><ispartof>The Journal of chemical physics, 2019-02, Vol.150 (6), p.064701-064701</ispartof><rights>Author(s)</rights><rights>2019 Author(s). 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However, the study on magnetic properties is rare. Inspired by the recent experimental synthesis of SnSe2 monolayer and Ag-doped SnSe2 thin films, we use the first-principles calculations combined with the nonequilibrium Green’s function method to investigate the structural, electronic, magnetic, and spin transport properties of an Ag-doped SnSe2 monolayer. It is found that the doped system exhibits half-metallic ferromagnetism with the energy gap of about 0.5 eV in the spin-down channel. The spin-polarized transport properties based on Ag-doped SnSe2 monolayers show an excellent spin filtering effect and a negative differential resistance effect under a bias voltage. Interestingly, under a temperature gradient, the spin Seebeck effect and the temperature-controlled reverse of spin polarization are also observed. These perfect spin transport properties can be understood from the calculated spin-polarized band structure and the spin-polarized transport spectrum. These studies indicate the potential spintronic and spin caloritronic applications for Ag-doped SnSe2 monolayer.</description><subject>Electron spin</subject><subject>Energy gap</subject><subject>Ferromagnetism</subject><subject>Filtration</subject><subject>First principles</subject><subject>Magnetic properties</subject><subject>Mathematical analysis</subject><subject>Metallicity</subject><subject>Monolayers</subject><subject>Optoelectronics</subject><subject>Polarization (spin alignment)</subject><subject>Seebeck effect</subject><subject>Silver</subject><subject>Temperature gradients</subject><subject>Thin films</subject><subject>Transport properties</subject><issn>0021-9606</issn><issn>1089-7690</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNp90N9LwzAQB_AgCs7pg_9BwBcVq0napMnj2PwFQ8HN55K2l62za2rSCfvvjdtQUPDp4O7D3fFF6JSSa0pEfEOvORFJytUe6lEiVZQKRfZRjxBGIyWIOERH3i8IITRlSQ_Np3PAc12baAmdruuqqLo11k2JuzDwbdVgU9UduKqZXeGn0ctmtulPAHIo3jAYA0XncWixER7MotK2UOJJMwGGl7axtV6DO0YHRtceTna1j17vbqfDh2j8fP84HIyjginSRTRWCnSecFCMSClzSYrcECokZdqUiaSJkCmLuTZK8JgzrniiY2p4yiTjedxH59u9rbPvK_Bdtqx8AXWtG7ArnzEqhaAi4WmgZ7_owq5cE74LKpUJC6d4UBdbVTjrvQOTta5aarfOKMm-Ms9otss82Mut9SFG3VW2-cYf1v3ArC3Nf_jv5k9QcIwT</recordid><startdate>20190214</startdate><enddate>20190214</enddate><creator>Wu, Xuming</creator><creator>Xiong, Lun</creator><creator>Feng, Yulin</creator><creator>Wang, Cong</creator><creator>Gao, Guoying</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0003-2880-2120</orcidid><orcidid>https://orcid.org/0000-0002-0606-3593</orcidid></search><sort><creationdate>20190214</creationdate><title>The half-metallicity and the spin filtering, NDR and spin Seebeck effects in 2D Ag-doped SnSe2 monolayer</title><author>Wu, Xuming ; Xiong, Lun ; Feng, Yulin ; Wang, Cong ; Gao, Guoying</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c290t-1399eab45e920888b80cbf016812afd4814687235af9653525954a31f572825b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Electron spin</topic><topic>Energy gap</topic><topic>Ferromagnetism</topic><topic>Filtration</topic><topic>First principles</topic><topic>Magnetic properties</topic><topic>Mathematical analysis</topic><topic>Metallicity</topic><topic>Monolayers</topic><topic>Optoelectronics</topic><topic>Polarization (spin alignment)</topic><topic>Seebeck effect</topic><topic>Silver</topic><topic>Temperature gradients</topic><topic>Thin films</topic><topic>Transport properties</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wu, Xuming</creatorcontrib><creatorcontrib>Xiong, Lun</creatorcontrib><creatorcontrib>Feng, Yulin</creatorcontrib><creatorcontrib>Wang, Cong</creatorcontrib><creatorcontrib>Gao, Guoying</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><jtitle>The Journal of chemical physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wu, Xuming</au><au>Xiong, Lun</au><au>Feng, Yulin</au><au>Wang, Cong</au><au>Gao, Guoying</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The half-metallicity and the spin filtering, NDR and spin Seebeck effects in 2D Ag-doped SnSe2 monolayer</atitle><jtitle>The Journal of chemical physics</jtitle><date>2019-02-14</date><risdate>2019</risdate><volume>150</volume><issue>6</issue><spage>064701</spage><epage>064701</epage><pages>064701-064701</pages><issn>0021-9606</issn><eissn>1089-7690</eissn><coden>JCPSA6</coden><abstract>Two-dimensional SnSe2 has become more and more attractive due to the excellent electronic, optoelectronic, and thermoelectric properties. However, the study on magnetic properties is rare. Inspired by the recent experimental synthesis of SnSe2 monolayer and Ag-doped SnSe2 thin films, we use the first-principles calculations combined with the nonequilibrium Green’s function method to investigate the structural, electronic, magnetic, and spin transport properties of an Ag-doped SnSe2 monolayer. It is found that the doped system exhibits half-metallic ferromagnetism with the energy gap of about 0.5 eV in the spin-down channel. The spin-polarized transport properties based on Ag-doped SnSe2 monolayers show an excellent spin filtering effect and a negative differential resistance effect under a bias voltage. Interestingly, under a temperature gradient, the spin Seebeck effect and the temperature-controlled reverse of spin polarization are also observed. These perfect spin transport properties can be understood from the calculated spin-polarized band structure and the spin-polarized transport spectrum. 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source | AIP Journals Complete; Alma/SFX Local Collection |
subjects | Electron spin Energy gap Ferromagnetism Filtration First principles Magnetic properties Mathematical analysis Metallicity Monolayers Optoelectronics Polarization (spin alignment) Seebeck effect Silver Temperature gradients Thin films Transport properties |
title | The half-metallicity and the spin filtering, NDR and spin Seebeck effects in 2D Ag-doped SnSe2 monolayer |
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