Dynamical spin susceptibility of a spin-valley half-metal
A few years ago we predicted theoretically that in systems with nesting of the Fermi surface the spin-valley half-metal has lower energy than the spin density wave state. In this paper we suggest a possible way to distinguish these phases experimentally. We calculate the dynamical spin susceptibilit...
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Veröffentlicht in: | Physical review. B 2020-06, Vol.101 (23), p.1, Article 235141 |
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creator | Khokhlov, D. A. Rakhmanov, A. L. Rozhkov, A. V. Sboychakov, A. O. |
description | A few years ago we predicted theoretically that in systems with nesting of the Fermi surface the spin-valley half-metal has lower energy than the spin density wave state. In this paper we suggest a possible way to distinguish these phases experimentally. We calculate the dynamical spin susceptibility tensor for both states in the framework of the Kubo formalism. Discussed phases have different numbers of bands: four bands in the spin-valley half-metal and only two bands in the spin density wave. Therefore, their susceptibilities, as functions of frequency, have different numbers of peaks. Besides, the spin-valley half-metal does not have rotational symmetry, thus, in general the off-diagonal components of the susceptibility tensor are nonzero. The spin density wave obeys robust rotational symmetry and off-diagonal components of the susceptibility tensor are zero. These characteristic features can be observed in experiments with inelastic neutron scattering. |
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A. ; Rakhmanov, A. L. ; Rozhkov, A. V. ; Sboychakov, A. O.</creator><creatorcontrib>Khokhlov, D. A. ; Rakhmanov, A. L. ; Rozhkov, A. V. ; Sboychakov, A. O.</creatorcontrib><description>A few years ago we predicted theoretically that in systems with nesting of the Fermi surface the spin-valley half-metal has lower energy than the spin density wave state. In this paper we suggest a possible way to distinguish these phases experimentally. We calculate the dynamical spin susceptibility tensor for both states in the framework of the Kubo formalism. Discussed phases have different numbers of bands: four bands in the spin-valley half-metal and only two bands in the spin density wave. Therefore, their susceptibilities, as functions of frequency, have different numbers of peaks. Besides, the spin-valley half-metal does not have rotational symmetry, thus, in general the off-diagonal components of the susceptibility tensor are nonzero. The spin density wave obeys robust rotational symmetry and off-diagonal components of the susceptibility tensor are zero. These characteristic features can be observed in experiments with inelastic neutron scattering.</description><identifier>ISSN: 2469-9950</identifier><identifier>EISSN: 2469-9969</identifier><identifier>DOI: 10.1103/PhysRevB.101.235141</identifier><language>eng</language><publisher>College Park: American Physical Society</publisher><subject>Fermi surfaces ; Inelastic scattering ; Mathematical analysis ; Nesting ; Neutron scattering ; Neutrons ; Spin density waves ; Symmetry ; Tensors ; Valleys</subject><ispartof>Physical review. 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The spin density wave obeys robust rotational symmetry and off-diagonal components of the susceptibility tensor are zero. These characteristic features can be observed in experiments with inelastic neutron scattering.</description><subject>Fermi surfaces</subject><subject>Inelastic scattering</subject><subject>Mathematical analysis</subject><subject>Nesting</subject><subject>Neutron scattering</subject><subject>Neutrons</subject><subject>Spin density waves</subject><subject>Symmetry</subject><subject>Tensors</subject><subject>Valleys</subject><issn>2469-9950</issn><issn>2469-9969</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNo9kF1LwzAUhoMoOOZ-gTcFr1tz8p1LnZ8wUESvQ5ImrCNba9MN-u-dVr16D-95OAcehC4BVwCYXr-ux_wWDrcVYKgI5cDgBM0IE7rUWujT_5njc7TIeYMxBoG1xHqG9N24s9vG21TkrtkVeZ996IbGNakZxqKNhf1ZlAebUhiLtU2x3IbBpgt0Fm3KYfGbc_TxcP--fCpXL4_Py5tV6YmUQxlcLUA5aVkdIuNRWeeps7VkCogGxgX1inOhuIcgJXbOSRUlZbXWjjBL5-hqutv17ec-5MFs2n2_O740hFEgnEopjhSdKN-3Ofchmq5vtrYfDWDzrcn8aToWYCZN9AsrKVwm</recordid><startdate>20200615</startdate><enddate>20200615</enddate><creator>Khokhlov, D. A.</creator><creator>Rakhmanov, A. L.</creator><creator>Rozhkov, A. V.</creator><creator>Sboychakov, A. O.</creator><general>American Physical Society</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>H8D</scope><scope>JG9</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0003-4016-8281</orcidid><orcidid>https://orcid.org/0000-0003-4320-9755</orcidid><orcidid>https://orcid.org/0000-0001-5128-3205</orcidid></search><sort><creationdate>20200615</creationdate><title>Dynamical spin susceptibility of a spin-valley half-metal</title><author>Khokhlov, D. A. ; Rakhmanov, A. L. ; Rozhkov, A. V. ; Sboychakov, A. 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O.</creatorcontrib><collection>CrossRef</collection><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. B</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Khokhlov, D. A.</au><au>Rakhmanov, A. L.</au><au>Rozhkov, A. V.</au><au>Sboychakov, A. O.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Dynamical spin susceptibility of a spin-valley half-metal</atitle><jtitle>Physical review. 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subjects | Fermi surfaces Inelastic scattering Mathematical analysis Nesting Neutron scattering Neutrons Spin density waves Symmetry Tensors Valleys |
title | Dynamical spin susceptibility of a spin-valley half-metal |
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