Chemical strain-dependent two-dimensional transport at RAlO3/SrTiO3 interfaces (R=La,Nd,Sm,and Gd)
Perovskite RAlO3 (R=La,Nd,Sm,and Gd) films have been deposited epitaxially on (001) TiO2-terminated SrTiO3 substrates. It is observed that the two-dimensional transport characteristics at the RAlO3/SrTiO3 interfaces are very sensitive to the species of rare-earth element, that is to chemical strain....
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| Veröffentlicht in: | Physical review. B 2016-12, Vol.94 (24) |
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| container_title | Physical review. B |
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| creator | Li, Chen Shen, Xuan Yang, Yurong Bai, Yuhang Yuan, Zhoushen Su, Dong Li, Aidong Zhang, Shantao Wang, Peng Bellaiche, Laurent Wu, Di |
| description | Perovskite RAlO3 (R=La,Nd,Sm,and Gd) films have been deposited epitaxially on (001) TiO2-terminated SrTiO3 substrates. It is observed that the two-dimensional transport characteristics at the RAlO3/SrTiO3 interfaces are very sensitive to the species of rare-earth element, that is to chemical strain. Although electron energy loss spectroscopy measurements show that electron transfer occurs in all the four polar/nonpolar heterostructures, the amount of electrons transferred across SmAlO3/SrTiO3 and GdAlO3/SrTiO3 interfaces are much less than those across LaAlO3/SrTiO3 and NdAlO3/SrTiO3 interfaces. First-principles calculations reveal the competition between ionic polarization and electronic polarization in the polar layers in compensating the build-in polarization due to the polar discontinuity at the interface. In particular, a large ionic polarization is found in SmAlO3/SrTiO3 and GdAlO3/SrTiO3 systems (which experience the largest tensile epitaxial strain), hence reducing the amount of electrons transferred. |
| doi_str_mv | 10.1103/PhysRevB.94.241116 |
| format | Article |
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(BNL), Upton, NY (United States) ; Univ. of Arkansas, Fayetteville, AR (United States) ; Nanjing Univ. (China)</creatorcontrib><description>Perovskite RAlO3 (R=La,Nd,Sm,and Gd) films have been deposited epitaxially on (001) TiO2-terminated SrTiO3 substrates. It is observed that the two-dimensional transport characteristics at the RAlO3/SrTiO3 interfaces are very sensitive to the species of rare-earth element, that is to chemical strain. Although electron energy loss spectroscopy measurements show that electron transfer occurs in all the four polar/nonpolar heterostructures, the amount of electrons transferred across SmAlO3/SrTiO3 and GdAlO3/SrTiO3 interfaces are much less than those across LaAlO3/SrTiO3 and NdAlO3/SrTiO3 interfaces. First-principles calculations reveal the competition between ionic polarization and electronic polarization in the polar layers in compensating the build-in polarization due to the polar discontinuity at the interface. In particular, a large ionic polarization is found in SmAlO3/SrTiO3 and GdAlO3/SrTiO3 systems (which experience the largest tensile epitaxial strain), hence reducing the amount of electrons transferred.</description><identifier>ISSN: 2469-9950</identifier><identifier>EISSN: 2469-9969</identifier><identifier>DOI: 10.1103/PhysRevB.94.241116</identifier><language>eng</language><publisher>College Park: American Physical Society</publisher><subject>Aluminates ; Center for Functional Nanomaterials ; dimensional transport ; Electron energy loss spectroscopy ; Electron transfer ; Energy dissipation ; First principles ; Gadolinium ; Gadolinium compounds ; Heterostructures ; INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY ; Lanthanum ; Organic chemistry ; Perovskite ; Perovskites ; polar discontinuity ; Polarization ; Rare earth elements ; Strontium titanates ; Substrates ; Titanium dioxide ; Transport</subject><ispartof>Physical review. 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(BNL), Upton, NY (United States)</creatorcontrib><creatorcontrib>Univ. of Arkansas, Fayetteville, AR (United States)</creatorcontrib><creatorcontrib>Nanjing Univ. (China)</creatorcontrib><title>Chemical strain-dependent two-dimensional transport at RAlO3/SrTiO3 interfaces (R=La,Nd,Sm,and Gd)</title><title>Physical review. B</title><description>Perovskite RAlO3 (R=La,Nd,Sm,and Gd) films have been deposited epitaxially on (001) TiO2-terminated SrTiO3 substrates. It is observed that the two-dimensional transport characteristics at the RAlO3/SrTiO3 interfaces are very sensitive to the species of rare-earth element, that is to chemical strain. Although electron energy loss spectroscopy measurements show that electron transfer occurs in all the four polar/nonpolar heterostructures, the amount of electrons transferred across SmAlO3/SrTiO3 and GdAlO3/SrTiO3 interfaces are much less than those across LaAlO3/SrTiO3 and NdAlO3/SrTiO3 interfaces. First-principles calculations reveal the competition between ionic polarization and electronic polarization in the polar layers in compensating the build-in polarization due to the polar discontinuity at the interface. In particular, a large ionic polarization is found in SmAlO3/SrTiO3 and GdAlO3/SrTiO3 systems (which experience the largest tensile epitaxial strain), hence reducing the amount of electrons transferred.</description><subject>Aluminates</subject><subject>Center for Functional Nanomaterials</subject><subject>dimensional transport</subject><subject>Electron energy loss spectroscopy</subject><subject>Electron transfer</subject><subject>Energy dissipation</subject><subject>First principles</subject><subject>Gadolinium</subject><subject>Gadolinium compounds</subject><subject>Heterostructures</subject><subject>INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY</subject><subject>Lanthanum</subject><subject>Organic chemistry</subject><subject>Perovskite</subject><subject>Perovskites</subject><subject>polar discontinuity</subject><subject>Polarization</subject><subject>Rare earth elements</subject><subject>Strontium titanates</subject><subject>Substrates</subject><subject>Titanium dioxide</subject><subject>Transport</subject><issn>2469-9950</issn><issn>2469-9969</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNo9j01LAzEYhIMoWGr_gKdFLwrdNl-b7XvwUItWoVhp63nJJm9pSpvUTar4712oeJqBeRhmCLlmdMAYFcP3zU9c4NfjAOSAS8aYOiMdLhXkAArO_31BL0kvxi2llCkKJYUOqScb3Dujd1lMjXY-t3hAb9GnLH2H3Lo9-uiCb4E29_EQmpTplC3Gu7kYLpuVm4vM-YTNWhuM2d3iYab7b7a_3Pe1t9nU3l-Ri7XeRez9aZd8PD-tJi_5bD59nYxneeCMprwAwJLXWqgC14JJqVHVVklra85rHLVzgY9QobFgJFWgLHCjJdK6BCmN6JKbU2-IyVXRuIRmY4L3aFLFhGSqlC10e4IOTfg8YkzVNhyb9l6sOOMKeEGLQvwCGyFkQA</recordid><startdate>20161227</startdate><enddate>20161227</enddate><creator>Li, Chen</creator><creator>Shen, Xuan</creator><creator>Yang, Yurong</creator><creator>Bai, Yuhang</creator><creator>Yuan, Zhoushen</creator><creator>Su, Dong</creator><creator>Li, Aidong</creator><creator>Zhang, Shantao</creator><creator>Wang, Peng</creator><creator>Bellaiche, Laurent</creator><creator>Wu, Di</creator><general>American Physical Society</general><general>American Physical Society (APS)</general><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>H8D</scope><scope>JG9</scope><scope>L7M</scope><scope>OIOZB</scope><scope>OTOTI</scope></search><sort><creationdate>20161227</creationdate><title>Chemical strain-dependent two-dimensional transport at RAlO3/SrTiO3 interfaces (R=La,Nd,Sm,and Gd)</title><author>Li, Chen ; Shen, Xuan ; Yang, Yurong ; Bai, Yuhang ; Yuan, Zhoushen ; Su, Dong ; Li, Aidong ; Zhang, Shantao ; Wang, Peng ; Bellaiche, Laurent ; Wu, Di</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-o210t-599e72ba365ef3144ae6bd64ddb22be8709928e6ecd9c40696d92ca4e0b7944c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Aluminates</topic><topic>Center for Functional Nanomaterials</topic><topic>dimensional transport</topic><topic>Electron energy loss spectroscopy</topic><topic>Electron transfer</topic><topic>Energy dissipation</topic><topic>First principles</topic><topic>Gadolinium</topic><topic>Gadolinium compounds</topic><topic>Heterostructures</topic><topic>INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY</topic><topic>Lanthanum</topic><topic>Organic chemistry</topic><topic>Perovskite</topic><topic>Perovskites</topic><topic>polar discontinuity</topic><topic>Polarization</topic><topic>Rare earth elements</topic><topic>Strontium titanates</topic><topic>Substrates</topic><topic>Titanium dioxide</topic><topic>Transport</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Li, Chen</creatorcontrib><creatorcontrib>Shen, Xuan</creatorcontrib><creatorcontrib>Yang, Yurong</creatorcontrib><creatorcontrib>Bai, Yuhang</creatorcontrib><creatorcontrib>Yuan, Zhoushen</creatorcontrib><creatorcontrib>Su, Dong</creatorcontrib><creatorcontrib>Li, Aidong</creatorcontrib><creatorcontrib>Zhang, Shantao</creatorcontrib><creatorcontrib>Wang, Peng</creatorcontrib><creatorcontrib>Bellaiche, Laurent</creatorcontrib><creatorcontrib>Wu, Di</creatorcontrib><creatorcontrib>Brookhaven National Lab. (BNL), Upton, NY (United States)</creatorcontrib><creatorcontrib>Univ. of Arkansas, Fayetteville, AR (United States)</creatorcontrib><creatorcontrib>Nanjing Univ. (China)</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><collection>OSTI.GOV - Hybrid</collection><collection>OSTI.GOV</collection><jtitle>Physical review. B</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Li, Chen</au><au>Shen, Xuan</au><au>Yang, Yurong</au><au>Bai, Yuhang</au><au>Yuan, Zhoushen</au><au>Su, Dong</au><au>Li, Aidong</au><au>Zhang, Shantao</au><au>Wang, Peng</au><au>Bellaiche, Laurent</au><au>Wu, Di</au><aucorp>Brookhaven National Lab. (BNL), Upton, NY (United States)</aucorp><aucorp>Univ. of Arkansas, Fayetteville, AR (United States)</aucorp><aucorp>Nanjing Univ. (China)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Chemical strain-dependent two-dimensional transport at RAlO3/SrTiO3 interfaces (R=La,Nd,Sm,and Gd)</atitle><jtitle>Physical review. B</jtitle><date>2016-12-27</date><risdate>2016</risdate><volume>94</volume><issue>24</issue><issn>2469-9950</issn><eissn>2469-9969</eissn><abstract>Perovskite RAlO3 (R=La,Nd,Sm,and Gd) films have been deposited epitaxially on (001) TiO2-terminated SrTiO3 substrates. It is observed that the two-dimensional transport characteristics at the RAlO3/SrTiO3 interfaces are very sensitive to the species of rare-earth element, that is to chemical strain. Although electron energy loss spectroscopy measurements show that electron transfer occurs in all the four polar/nonpolar heterostructures, the amount of electrons transferred across SmAlO3/SrTiO3 and GdAlO3/SrTiO3 interfaces are much less than those across LaAlO3/SrTiO3 and NdAlO3/SrTiO3 interfaces. First-principles calculations reveal the competition between ionic polarization and electronic polarization in the polar layers in compensating the build-in polarization due to the polar discontinuity at the interface. In particular, a large ionic polarization is found in SmAlO3/SrTiO3 and GdAlO3/SrTiO3 systems (which experience the largest tensile epitaxial strain), hence reducing the amount of electrons transferred.</abstract><cop>College Park</cop><pub>American Physical Society</pub><doi>10.1103/PhysRevB.94.241116</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Aluminates Center for Functional Nanomaterials dimensional transport Electron energy loss spectroscopy Electron transfer Energy dissipation First principles Gadolinium Gadolinium compounds Heterostructures INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY Lanthanum Organic chemistry Perovskite Perovskites polar discontinuity Polarization Rare earth elements Strontium titanates Substrates Titanium dioxide Transport |
| title | Chemical strain-dependent two-dimensional transport at RAlO3/SrTiO3 interfaces (R=La,Nd,Sm,and Gd) |
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