Two-magnon bound states in the Kitaev model in a [111] field
It is now well established that the Kitaev honeycomb model in a magnetic field along the [111] direction harbors an intermediate gapless quantum spin liquid (QSL) phase sandwiched between a gapped non-Abelian QSL at low fields HHc2. Here, we analyze the low-field and high-field phases and phase tran...
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| Veröffentlicht in: | Physical review. B 2020-05, Vol.101 (18), p.1, Article 180401 |
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| creator | Pradhan, Subhasree Patel, Niravkumar D. Trivedi, Nandini |
| description | It is now well established that the Kitaev honeycomb model in a magnetic field along the [111] direction harbors an intermediate gapless quantum spin liquid (QSL) phase sandwiched between a gapped non-Abelian QSL at low fields HHc2. Here, we analyze the low-field and high-field phases and phase transitions in terms of single- and two-magnon excitations using exact diagonalization and density matrix renormalization group methods. We find that the energy to create a bound state of two-magnon Δp becomes lower than the energy to create a single spin flip Δs near Hc2. In the entire Kitaev spin liquid, Δp |
| doi_str_mv | 10.1103/PhysRevB.101.180401 |
| format | Article |
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Here, we analyze the low-field and high-field phases and phase transitions in terms of single- and two-magnon excitations using exact diagonalization and density matrix renormalization group methods. We find that the energy to create a bound state of two-magnon Δp becomes lower than the energy to create a single spin flip Δs near Hc2. In the entire Kitaev spin liquid, Δp<Δs and both gaps vanish at Hc2. We make testable predictions for magnon pairing that could be observable in Raman scattering measurements on Kitaev QSL candidate materials.</description><identifier>ISSN: 2469-9950</identifier><identifier>EISSN: 2469-9969</identifier><identifier>DOI: 10.1103/PhysRevB.101.180401</identifier><language>eng</language><publisher>College Park: American Physical Society</publisher><subject>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ; Magnons ; Materials Science ; Materials selection ; Phase transitions ; Physics ; Raman spectra ; Renormalization group methods ; Spin liquid</subject><ispartof>Physical review. 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We make testable predictions for magnon pairing that could be observable in Raman scattering measurements on Kitaev QSL candidate materials.</description><subject>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</subject><subject>Magnons</subject><subject>Materials Science</subject><subject>Materials selection</subject><subject>Phase transitions</subject><subject>Physics</subject><subject>Raman spectra</subject><subject>Renormalization group methods</subject><subject>Spin liquid</subject><issn>2469-9950</issn><issn>2469-9969</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNo9kE1Lw0AQhoMoWLS_wMui59SZ7CbpghctfmFBkXoSWTa7szalzdbsttJ_b0rU0wwvDy8zT5KcIYwQgV--zHfhlbY3IwQc4RgE4EEyyEQhUykLefi_53CcDENYAAAWIEuQg-Rq9u3Tlf5sfMMqv2ksC1FHCqxuWJwTe6qjpi1beUvLfabZOyJ-MFfT0p4mR04vAw1_50nydnc7mzyk0-f7x8n1NDUcREwrMkhopaHCIPLCioq0BtKQUcmBu8JUphSVlc4VPEOZ55njY8iELaRDy0-S877Xh1irYOpIZm5805CJqvsYRDnuoIseWrf-a0MhqoXftE13l8oEyAxFLrGjeE-Z1ofQklPrtl7pdqcQ1F6n-tPZBah6nfwHaKtnjQ</recordid><startdate>20200501</startdate><enddate>20200501</enddate><creator>Pradhan, Subhasree</creator><creator>Patel, Niravkumar D.</creator><creator>Trivedi, Nandini</creator><general>American Physical Society</general><general>American Physical Society (APS)</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><scope>OIOZB</scope><scope>OTOTI</scope></search><sort><creationdate>20200501</creationdate><title>Two-magnon bound states in the Kitaev model in a [111] field</title><author>Pradhan, Subhasree ; Patel, Niravkumar D. ; Trivedi, Nandini</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c304t-bec1e1d9ce6c1136d4beaa0ea02e7303f6cbc74bd9ff63219552f38024d69f1d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</topic><topic>Magnons</topic><topic>Materials Science</topic><topic>Materials selection</topic><topic>Phase transitions</topic><topic>Physics</topic><topic>Raman spectra</topic><topic>Renormalization group methods</topic><topic>Spin liquid</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Pradhan, Subhasree</creatorcontrib><creatorcontrib>Patel, Niravkumar D.</creatorcontrib><creatorcontrib>Trivedi, Nandini</creatorcontrib><creatorcontrib>The Ohio State Univ., Columbus, OH (United States)</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><collection>OSTI.GOV - Hybrid</collection><collection>OSTI.GOV</collection><jtitle>Physical review. 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Here, we analyze the low-field and high-field phases and phase transitions in terms of single- and two-magnon excitations using exact diagonalization and density matrix renormalization group methods. We find that the energy to create a bound state of two-magnon Δp becomes lower than the energy to create a single spin flip Δs near Hc2. In the entire Kitaev spin liquid, Δp<Δs and both gaps vanish at Hc2. We make testable predictions for magnon pairing that could be observable in Raman scattering measurements on Kitaev QSL candidate materials.</abstract><cop>College Park</cop><pub>American Physical Society</pub><doi>10.1103/PhysRevB.101.180401</doi><oa>free_for_read</oa></addata></record> |
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| subjects | CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Magnons Materials Science Materials selection Phase transitions Physics Raman spectra Renormalization group methods Spin liquid |
| title | Two-magnon bound states in the Kitaev model in a [111] field |
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