Strongly spin-orbit coupled two-dimensional electron gas emerging near the surface of polar semiconductors

M. Sakano; M. S. Bahramy; A. Katayama; T. Shimojima; H. Murakawa; Y. Kaneko; W. Malaeb; S. Shin; K. Ono; H. Kumigashira; R. Arita; N. Nagaosa; H. Y. Hwang; Y. Tokura; K. Ishizaka

doi:10.1103/PhysRevLett.110.107204

Strongly spin-orbit coupled two-dimensional electron gas emerging near the surface of polar semiconductors

M. Sakano, M. S. Bahramy, A. Katayama, T. Shimojima, H. Murakawa, Y. Kaneko, W. Malaeb, S. Shin, K. Ono, H. Kumigashira, R. Arita, N. Nagaosa, H. Y. Hwang, Y. Tokura, K. Ishizaka

研究成果: Article › 査読

118 被引用数 (Scopus)

抄録

We investigate the two-dimensional highly spin-polarized electron accumulation layers commonly appearing near the surface of n-type polar semiconductors BiTeX (X=I, Br, and Cl) by angular-resolved photoemission spectroscopy. Because of the polarity and the strong spin-orbit interaction built in the bulk atomic configurations, the quantized conduction-band subbands show giant Rashba-type spin splitting. The characteristic 2D confinement effect is clearly observed also in the valence bands down to the binding energy of 4 eV. The X-dependent Rashba spin-orbit coupling is directly estimated from the observed spin-split subbands, which roughly scales with the inverse of the band-gap size in BiTeX.

本文言語	English
論文番号	107204
ジャーナル	Physical review letters
巻	110
号	10
DOI	https://doi.org/10.1103/PhysRevLett.110.107204
出版ステータス	Published - 2013 3 7
外部発表	はい

ASJC Scopus subject areas

Physics and Astronomy(all)

文献へのアクセス

10.1103/PhysRevLett.110.107204

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引用スタイル

Sakano, M., Bahramy, M. S., Katayama, A., Shimojima, T., Murakawa, H., Kaneko, Y., Malaeb, W., Shin, S., Ono, K., Kumigashira, H., Arita, R., Nagaosa, N., Hwang, H. Y., Tokura, Y., & Ishizaka, K. (2013). Strongly spin-orbit coupled two-dimensional electron gas emerging near the surface of polar semiconductors. Physical review letters, 110(10), [107204]. https://doi.org/10.1103/PhysRevLett.110.107204

Strongly spin-orbit coupled two-dimensional electron gas emerging near the surface of polar semiconductors. / Sakano, M.; Bahramy, M. S.; Katayama, A.; Shimojima, T.; Murakawa, H.; Kaneko, Y.; Malaeb, W.; Shin, S.; Ono, K.; Kumigashira, H.; Arita, R.; Nagaosa, N.; Hwang, H. Y.; Tokura, Y.; Ishizaka, K.

In: Physical review letters, Vol. 110, No. 10, 107204, 07.03.2013.

研究成果: Article › 査読

Sakano, M, Bahramy, MS, Katayama, A, Shimojima, T, Murakawa, H, Kaneko, Y, Malaeb, W, Shin, S, Ono, K, Kumigashira, H, Arita, R, Nagaosa, N, Hwang, HY, Tokura, Y & Ishizaka, K 2013, 'Strongly spin-orbit coupled two-dimensional electron gas emerging near the surface of polar semiconductors', Physical review letters, vol. 110, no. 10, 107204. https://doi.org/10.1103/PhysRevLett.110.107204

Sakano, M. ; Bahramy, M. S. ; Katayama, A. ; Shimojima, T. ; Murakawa, H. ; Kaneko, Y. ; Malaeb, W. ; Shin, S. ; Ono, K. ; Kumigashira, H. ; Arita, R. ; Nagaosa, N. ; Hwang, H. Y. ; Tokura, Y. ; Ishizaka, K. / Strongly spin-orbit coupled two-dimensional electron gas emerging near the surface of polar semiconductors. In: Physical review letters. 2013 ; Vol. 110, No. 10.

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abstract = "We investigate the two-dimensional highly spin-polarized electron accumulation layers commonly appearing near the surface of n-type polar semiconductors BiTeX (X=I, Br, and Cl) by angular-resolved photoemission spectroscopy. Because of the polarity and the strong spin-orbit interaction built in the bulk atomic configurations, the quantized conduction-band subbands show giant Rashba-type spin splitting. The characteristic 2D confinement effect is clearly observed also in the valence bands down to the binding energy of 4 eV. The X-dependent Rashba spin-orbit coupling is directly estimated from the observed spin-split subbands, which roughly scales with the inverse of the band-gap size in BiTeX.",

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AU - Bahramy, M. S.

AU - Katayama, A.

AU - Shimojima, T.

AU - Murakawa, H.

AU - Kaneko, Y.

AU - Malaeb, W.

AU - Shin, S.

AU - Ono, K.

AU - Kumigashira, H.

AU - Arita, R.

AU - Nagaosa, N.

AU - Hwang, H. Y.

AU - Tokura, Y.

AU - Ishizaka, K.

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