Spin-Orbital Excitations in Ca2RuO4 Revealed by Resonant Inelastic X-Ray Scattering
The strongly correlated insulatorCa2RuO4is considered as a paradigmatic realization of both spin-orbital physics and a band-Mott insulating phase, characterized by orbitally selective coexistence of a band and a Mott gap. We present a high resolution oxygenK-edge resonant inelastic x-ray scattering...
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| creator | Das, L te, F Fittipaldi, R Fatuzzo, C G Granata, V Ivashko, O Horio, M Schindler, F Dantz, M Tseng, Yi McNally, D E Rønnow, H M Wan, W Christensen, N B Pelliciari, J Olalde-Velasco, P Kikugawa, N Neupert, T Vecchione, A Schmitt, T Cuoco, M Chang, J |
| description | The strongly correlated insulatorCa2RuO4is considered as a paradigmatic realization of both spin-orbital physics and a band-Mott insulating phase, characterized by orbitally selective coexistence of a band and a Mott gap. We present a high resolution oxygenK-edge resonant inelastic x-ray scattering study of the antiferromagnetic Mott insulating state ofCa2RuO4. A set of low-energy (about 80 and 400 meV) and high-energy (about 1.3 and 2.2 eV) excitations are reported, which show strong incident light polarization dependence. Our results strongly support a spin-orbit coupled band-Mott scenario and explore in detail the nature of its exotic excitations. Guided by theoretical modeling, we interpret the low-energy excitations as a result of composite spin-orbital excitations. Their nature unveils the intricate interplay of crystal-field splitting and spin-orbit coupling in the band-Mott scenario. The high-energy excitations correspond to intra-atomic singlet-triplet transitions at an energy scale set by Hund’s coupling. Our findings give a unifying picture of the spin and orbital excitations in the band-Mott insulatorCa2RuO4. |
| doi_str_mv | 10.1103/PhysRevX.8.011048 |
| format | Article |
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We present a high resolution oxygenK-edge resonant inelastic x-ray scattering study of the antiferromagnetic Mott insulating state ofCa2RuO4. A set of low-energy (about 80 and 400 meV) and high-energy (about 1.3 and 2.2 eV) excitations are reported, which show strong incident light polarization dependence. Our results strongly support a spin-orbit coupled band-Mott scenario and explore in detail the nature of its exotic excitations. Guided by theoretical modeling, we interpret the low-energy excitations as a result of composite spin-orbital excitations. Their nature unveils the intricate interplay of crystal-field splitting and spin-orbit coupling in the band-Mott scenario. The high-energy excitations correspond to intra-atomic singlet-triplet transitions at an energy scale set by Hund’s coupling. 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X</title><description>The strongly correlated insulatorCa2RuO4is considered as a paradigmatic realization of both spin-orbital physics and a band-Mott insulating phase, characterized by orbitally selective coexistence of a band and a Mott gap. We present a high resolution oxygenK-edge resonant inelastic x-ray scattering study of the antiferromagnetic Mott insulating state ofCa2RuO4. A set of low-energy (about 80 and 400 meV) and high-energy (about 1.3 and 2.2 eV) excitations are reported, which show strong incident light polarization dependence. Our results strongly support a spin-orbit coupled band-Mott scenario and explore in detail the nature of its exotic excitations. Guided by theoretical modeling, we interpret the low-energy excitations as a result of composite spin-orbital excitations. Their nature unveils the intricate interplay of crystal-field splitting and spin-orbit coupling in the band-Mott scenario. The high-energy excitations correspond to intra-atomic singlet-triplet transitions at an energy scale set by Hund’s coupling. Our findings give a unifying picture of the spin and orbital excitations in the band-Mott insulatorCa2RuO4.</description><subject>Antiferromagnetism</subject><subject>Electron spin</subject><subject>Electrons</subject><subject>Energy</subject><subject>Energy resolution</subject><subject>Excitation spectra</subject><subject>Experiments</subject><subject>Ground state</subject><subject>Incident light</subject><subject>Inelastic scattering</subject><subject>Insulators</subject><subject>Modelling</subject><subject>Ruthenium</subject><subject>Spin-orbit interactions</subject><subject>X-ray scattering</subject><issn>2160-3308</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNotjk1LxDAYhIMguKz7A7wFPLcmeds0PUpZdWGh0irsbcmndinp2qTi_nsDOpdnmMPMIHRHSU4pgYfXz0vo7PchFzlJQSGu0IpRTjIAIm7QJoQTSeKEFlW1Qn1_HnzWzmqIcsTbH50Yh8kHPHjcSNYtbYFTn5WjNVhdkg-Tlz7inbejDHHQ-JB18oJ7LWO08-A_btG1k2Owm3-u0fvT9q15yfbt86553GeaAY2ZJsZQqjlhTqU3hClTC2NKRZgGqFQFpnZguTHa1axykmkjOAhNwQrmANbo_q_3PE9fiw3xeJqW2afJIytLwiktBIVfO7FRyQ</recordid><startdate>20180322</startdate><enddate>20180322</enddate><creator>Das, L</creator><creator>te, F</creator><creator>Fittipaldi, R</creator><creator>Fatuzzo, C G</creator><creator>Granata, V</creator><creator>Ivashko, O</creator><creator>Horio, M</creator><creator>Schindler, F</creator><creator>Dantz, M</creator><creator>Tseng, Yi</creator><creator>McNally, D E</creator><creator>Rønnow, H M</creator><creator>Wan, W</creator><creator>Christensen, N B</creator><creator>Pelliciari, J</creator><creator>Olalde-Velasco, P</creator><creator>Kikugawa, N</creator><creator>Neupert, T</creator><creator>Vecchione, A</creator><creator>Schmitt, T</creator><creator>Cuoco, M</creator><creator>Chang, J</creator><general>American Physical Society</general><scope>3V.</scope><scope>7XB</scope><scope>88I</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</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>GNUQQ</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M2P</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>Q9U</scope></search><sort><creationdate>20180322</creationdate><title>Spin-Orbital Excitations in Ca2RuO4 Revealed by Resonant Inelastic X-Ray Scattering</title><author>Das, L ; 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X</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Das, L</au><au>te, F</au><au>Fittipaldi, R</au><au>Fatuzzo, C G</au><au>Granata, V</au><au>Ivashko, O</au><au>Horio, M</au><au>Schindler, F</au><au>Dantz, M</au><au>Tseng, Yi</au><au>McNally, D E</au><au>Rønnow, H M</au><au>Wan, W</au><au>Christensen, N B</au><au>Pelliciari, J</au><au>Olalde-Velasco, P</au><au>Kikugawa, N</au><au>Neupert, T</au><au>Vecchione, A</au><au>Schmitt, T</au><au>Cuoco, M</au><au>Chang, J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Spin-Orbital Excitations in Ca2RuO4 Revealed by Resonant Inelastic X-Ray Scattering</atitle><jtitle>Physical review. X</jtitle><date>2018-03-22</date><risdate>2018</risdate><volume>8</volume><issue>1</issue><eissn>2160-3308</eissn><abstract>The strongly correlated insulatorCa2RuO4is considered as a paradigmatic realization of both spin-orbital physics and a band-Mott insulating phase, characterized by orbitally selective coexistence of a band and a Mott gap. We present a high resolution oxygenK-edge resonant inelastic x-ray scattering study of the antiferromagnetic Mott insulating state ofCa2RuO4. A set of low-energy (about 80 and 400 meV) and high-energy (about 1.3 and 2.2 eV) excitations are reported, which show strong incident light polarization dependence. Our results strongly support a spin-orbit coupled band-Mott scenario and explore in detail the nature of its exotic excitations. Guided by theoretical modeling, we interpret the low-energy excitations as a result of composite spin-orbital excitations. Their nature unveils the intricate interplay of crystal-field splitting and spin-orbit coupling in the band-Mott scenario. The high-energy excitations correspond to intra-atomic singlet-triplet transitions at an energy scale set by Hund’s coupling. Our findings give a unifying picture of the spin and orbital excitations in the band-Mott insulatorCa2RuO4.</abstract><cop>College Park</cop><pub>American Physical Society</pub><doi>10.1103/PhysRevX.8.011048</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Antiferromagnetism Electron spin Electrons Energy Energy resolution Excitation spectra Experiments Ground state Incident light Inelastic scattering Insulators Modelling Ruthenium Spin-orbit interactions X-ray scattering |
| title | Spin-Orbital Excitations in Ca2RuO4 Revealed by Resonant Inelastic X-Ray Scattering |
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