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ID 33903
本文ファイル
著者
Jung, Wonsig
Kim, Yeongkwan
Kim, Beomyoung
Koh, Yoonyoung
Kim, Chul
Matsunami, Masaharu
Kimura, Shin-ichi
Arita, Masashi
Han, Jung Hoon
Kim, Juyoung
Cho, Beongki
Kim, Changyoung
NDC
物理学
抄録(英)
We performed angle-resolved photoemission (ARPES) experiments on Bi2Te3 with circularly polarized light. ARPES data show very strong circular dichroism, indicating the existence of orbital angular momentum (OAM). Moreover, the alignment of OAM is found to have a strong binding energy dependence. Such energy dependence comes from a relatively strong band warping effect in Bi2Te3 compared to Bi2Se3. OAM close to the Dirac point has an ideal chiral structure (sinθ) without an out-of-plane component. The warping effect comes in as the binding energy decreases, and circular dichroism along a constant energy contour can no longer be explained by a simple sinθ function but requires a sin3θ term. When the warping effect becomes even stronger near the Fermi energy, circular dichroism gains an additional sin6θ term. Such behavior is found to be compatible with the theoretically predicted OAM structure.
掲載誌名
Physical Review B
84巻
24号
開始ページ
245435
出版年月日
2011
出版者
American Physical Society
ISSN
1098-0121
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
(c) 2011 American Physical Society
関連情報URL
部局名
放射光科学研究センター