| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2025-11-25 |
| タイトル |
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|
タイトル |
Observation of spin-conserving two-spinon continuum in the S=1/2 antiferromagnetic chain system Sr2CuO3 using Cu K-edge resonant inelastic x-ray scattering |
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言語 |
en |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Keni Ishii
Kenji Tsutsui
Takayuki Kawamata
Yoji Koike
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| 抄録 |
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内容記述タイプ |
Abstract |
|
内容記述 |
We report a Cu K-edge resonant inelastic x-ray scattering (RIXS) study of spin excitations in the S=1/2 antiferromagnetic chain system Sr2CuO3. The spectral weight observed below the charge-transfer gap appears in two-spinon continuum, indicating the fractionalization of a spin-conserving (ΔS = 0) magnetic excitation into two-spinon states. The intensity of these excitations reaches a maximum near the midpoint between the center and the boundary of the Brillouin zone, and decreases toward the zone boundary; this behavior contrasts with that of the spin-flip (ΔS = 1) excitations typically observed via inelastic neutron scattering or Cu L3-edge RIXS. The momentum dependence of the intensity is described by the spin-exchange dynamical structure factor. A phenomenological analysis of the symmetry between the polarization and the d orbital explains the resonance condition for the two-spinon excitations. |
| 書誌情報 |
Physical Review B
巻 112,
号 19,
p. 195132,
発行日 2025-11
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| 出版者 |
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出版者 |
アメリカ物理学会 |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
2469-9969 |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1103/53wr-vpcp |
