Disorder in a quantum spin liquid: flux binding and local moment formation.
We study the consequences of disorder in the Kitaev honeycomb model, considering both site dilution and exchange randomness. We show that a single vacancy binds a flux and induces a local moment. This moment is polarized by an applied field h: in the gapless phase, for small h the local susceptibili...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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2010
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| _version_ | 1826263778149269504 |
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| author | Willans, A Chalker, J Moessner, R |
| author_facet | Willans, A Chalker, J Moessner, R |
| author_sort | Willans, A |
| collection | OXFORD |
| description | We study the consequences of disorder in the Kitaev honeycomb model, considering both site dilution and exchange randomness. We show that a single vacancy binds a flux and induces a local moment. This moment is polarized by an applied field h: in the gapless phase, for small h the local susceptibility diverges as χ(h)∼ln(1/h); for a pair of nearby vacancies on the same sublattice, this even increases to χ(h)∼1/(h[ln(1/h)](3/2)). By contrast, weak exchange randomness does not qualitatively alter the susceptibility but has its signature in the heat capacity, which in the gapless phase is power law in temperature with an exponent dependent on disorder strength. |
| first_indexed | 2024-03-06T19:57:15Z |
| format | Journal article |
| id | oxford-uuid:260acd7f-9afa-49f4-a806-861b4ddcd582 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:57:15Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:260acd7f-9afa-49f4-a806-861b4ddcd5822022-03-26T11:58:46ZDisorder in a quantum spin liquid: flux binding and local moment formation.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:260acd7f-9afa-49f4-a806-861b4ddcd582EnglishSymplectic Elements at Oxford2010Willans, AChalker, JMoessner, RWe study the consequences of disorder in the Kitaev honeycomb model, considering both site dilution and exchange randomness. We show that a single vacancy binds a flux and induces a local moment. This moment is polarized by an applied field h: in the gapless phase, for small h the local susceptibility diverges as χ(h)∼ln(1/h); for a pair of nearby vacancies on the same sublattice, this even increases to χ(h)∼1/(h[ln(1/h)](3/2)). By contrast, weak exchange randomness does not qualitatively alter the susceptibility but has its signature in the heat capacity, which in the gapless phase is power law in temperature with an exponent dependent on disorder strength. |
| spellingShingle | Willans, A Chalker, J Moessner, R Disorder in a quantum spin liquid: flux binding and local moment formation. |
| title | Disorder in a quantum spin liquid: flux binding and local moment formation. |
| title_full | Disorder in a quantum spin liquid: flux binding and local moment formation. |
| title_fullStr | Disorder in a quantum spin liquid: flux binding and local moment formation. |
| title_full_unstemmed | Disorder in a quantum spin liquid: flux binding and local moment formation. |
| title_short | Disorder in a quantum spin liquid: flux binding and local moment formation. |
| title_sort | disorder in a quantum spin liquid flux binding and local moment formation |
| work_keys_str_mv | AT willansa disorderinaquantumspinliquidfluxbindingandlocalmomentformation AT chalkerj disorderinaquantumspinliquidfluxbindingandlocalmomentformation AT moessnerr disorderinaquantumspinliquidfluxbindingandlocalmomentformation |