Full ferromagnetic saturation of a two-dimensional quantum antiferromagnet.
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| Title: | Full ferromagnetic saturation of a two-dimensional quantum antiferromagnet. |
|---|---|
| Authors: | Coldea, R., Tennant, D.A., Habicht, K., Smeibidl, P., Tylczynski, Z. |
| Source: | Applied Physics A: Materials Science & Processing. Dec2002 Supplement, Vol. 74 Issue 6, ps904. 1p. |
| Subjects: | Antiferromagnetism, Ferromagnetic materials |
| Abstract: | Cs[sub 2]CuCl[sub 4] is a 2D frustrated quantum magnet that has recently been shown to display a very unusual quantum spin liquid state. The excitations are not spin-1 magnons as observed in other un-frustrated 2D quantum magnets but instead are spinons carrying a fractional spin of ½, as predicted by a resonating-valence-bond picture. Here we use high magnetic fields to induce a transition from this fractional quantum spin-liquid phase to the fully-polarized phase where spins are ferromagnetically aligned along the field. In this field-induced phase all quantum fluctuations are quenched by the external field and the system is expected to behave like a classical magnet with spin-1 magnon excitations. Measurements are made in fields up to 12 T and temperatures below 0.2 K. Ferromagnetic saturation is observed at the critical field B[sub c] = 8.44(1)T a. Above B[sub c] the measured excitations lineshapes show well-defined, almost resolutionlimited peaks as expected for spin-1 magnons and are gapped throughout the zone. The gap to the lowest energy excitation decreases linearly upon decreasing field and closes at B[sub c], below which the system orders into a cone phase. This transition provides an opportunity to study how ordered phases arise from the condensation of excitations. [ABSTRACT FROM AUTHOR] |
| Copyright of Applied Physics A: Materials Science & Processing is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 8905010 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Full ferromagnetic saturation of a two-dimensional quantum antiferromagnet. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Coldea%2C+R%2E%22">Coldea, R.</searchLink><br /><searchLink fieldCode="AR" term="%22Tennant%2C+D%2EA%2E%22">Tennant, D.A.</searchLink><br /><searchLink fieldCode="AR" term="%22Habicht%2C+K%2E%22">Habicht, K.</searchLink><br /><searchLink fieldCode="AR" term="%22Smeibidl%2C+P%2E%22">Smeibidl, P.</searchLink><br /><searchLink fieldCode="AR" term="%22Tylczynski%2C+Z%2E%22">Tylczynski, Z.</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Applied+Physics+A%3A+Materials+Science+%26+Processing%22">Applied Physics A: Materials Science & Processing</searchLink>. Dec2002 Supplement, Vol. 74 Issue 6, ps904. 1p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Antiferromagnetism%22">Antiferromagnetism</searchLink><br /><searchLink fieldCode="DE" term="%22Ferromagnetic+materials%22">Ferromagnetic materials</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Cs[sub 2]CuCl[sub 4] is a 2D frustrated quantum magnet that has recently been shown to display a very unusual quantum spin liquid state. The excitations are not spin-1 magnons as observed in other un-frustrated 2D quantum magnets but instead are spinons carrying a fractional spin of ½, as predicted by a resonating-valence-bond picture. Here we use high magnetic fields to induce a transition from this fractional quantum spin-liquid phase to the fully-polarized phase where spins are ferromagnetically aligned along the field. In this field-induced phase all quantum fluctuations are quenched by the external field and the system is expected to behave like a classical magnet with spin-1 magnon excitations. Measurements are made in fields up to 12 T and temperatures below 0.2 K. Ferromagnetic saturation is observed at the critical field B[sub c] = 8.44(1)T a. Above B[sub c] the measured excitations lineshapes show well-defined, almost resolutionlimited peaks as expected for spin-1 magnons and are gapped throughout the zone. The gap to the lowest energy excitation decreases linearly upon decreasing field and closes at B[sub c], below which the system orders into a cone phase. This transition provides an opportunity to study how ordered phases arise from the condensation of excitations. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Applied Physics A: Materials Science & Processing is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s003390101163 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: s904 Subjects: – SubjectFull: Antiferromagnetism Type: general – SubjectFull: Ferromagnetic materials Type: general Titles: – TitleFull: Full ferromagnetic saturation of a two-dimensional quantum antiferromagnet. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Coldea, R. – PersonEntity: Name: NameFull: Tennant, D.A. – PersonEntity: Name: NameFull: Habicht, K. – PersonEntity: Name: NameFull: Smeibidl, P. – PersonEntity: Name: NameFull: Tylczynski, Z. IsPartOfRelationships: – BibEntity: Dates: – D: 02 M: 06 Text: Dec2002 Supplement Type: published Y: 2002 Identifiers: – Type: issn-print Value: 09478396 Numbering: – Type: volume Value: 74 – Type: issue Value: 6 Titles: – TitleFull: Applied Physics A: Materials Science & Processing Type: main |
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