Common origin of the circular-dichroism pattern in angle-resolved photoemission spectroscopy of SrTiO3 and CuxBi 2Se3

Y. Ishida; H. Kanto; A. Kikkawa; Y. Taguchi; Y. Ito; Y. Ota; K. Okazaki; W. Malaeb; M. Mulazzi; M. Okawa; S. Watanabe; C. T. Chen; M. Kim; C. Bell; Y. Kozuka; H. Y. Hwang; Y. Tokura; S. Shin

doi:10.1103/PhysRevLett.107.077601

Common origin of the circular-dichroism pattern in angle-resolved photoemission spectroscopy of SrTiO₃ and Cu_xBi ₂Se₃

Y. Ishida^*, H. Kanto, A. Kikkawa, Y. Taguchi, Y. Ito, Y. Ota, K. Okazaki, W. Malaeb, M. Mulazzi, M. Okawa, S. Watanabe, C. T. Chen, M. Kim, C. Bell, Y. Kozuka, H. Y. Hwang, Y. Tokura, S. Shin

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

Circular dichroism in the angular distribution of photoelectrons from SrTiO₃:Nb and Cu_xBi₂Se₃ is investigated by 7-eV laser angle-resolved photoemission spectroscopy. In addition to the well-known node that occurs in the circular dichroism pattern when the incidence plane matches the mirror plane of the crystal, we show that another type of node occurs when the mirror plane of the crystal is vertical to the incidence plane and the electronic state is two-dimensional. The flower-shaped circular dichroism patterns in the angular distribution occurring around the Fermi level of SrTiO₃:Nb and around the Dirac point of Cu_xBi₂Se₃ are explained on equal footings. We point out that the penetration depth of the topological states of Cu _xBi₂Se₃ depends on momentum.

Original language	English
Article number	077601
Journal	Physical Review Letters
Volume	107
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.107.077601
Publication status	Published - 2011 Aug 9
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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Ishida, Y., Kanto, H., Kikkawa, A., Taguchi, Y., Ito, Y., Ota, Y., Okazaki, K., Malaeb, W., Mulazzi, M., Okawa, M., Watanabe, S., Chen, C. T., Kim, M., Bell, C., Kozuka, Y., Hwang, H. Y., Tokura, Y., & Shin, S. (2011). Common origin of the circular-dichroism pattern in angle-resolved photoemission spectroscopy of SrTiO₃ and Cu_xBi ₂Se₃. Physical Review Letters, 107(7), Article 077601. https://doi.org/10.1103/PhysRevLett.107.077601

Ishida, Y, Kanto, H, Kikkawa, A, Taguchi, Y, Ito, Y, Ota, Y, Okazaki, K, Malaeb, W, Mulazzi, M, Okawa, M, Watanabe, S, Chen, CT, Kim, M, Bell, C, Kozuka, Y, Hwang, HY, Tokura, Y & Shin, S 2011, 'Common origin of the circular-dichroism pattern in angle-resolved photoemission spectroscopy of SrTiO₃ and Cu_xBi ₂Se₃', Physical Review Letters, vol. 107, no. 7, 077601. https://doi.org/10.1103/PhysRevLett.107.077601

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title = "Common origin of the circular-dichroism pattern in angle-resolved photoemission spectroscopy of SrTiO3 and CuxBi 2Se3",

abstract = "Circular dichroism in the angular distribution of photoelectrons from SrTiO3:Nb and CuxBi2Se3 is investigated by 7-eV laser angle-resolved photoemission spectroscopy. In addition to the well-known node that occurs in the circular dichroism pattern when the incidence plane matches the mirror plane of the crystal, we show that another type of node occurs when the mirror plane of the crystal is vertical to the incidence plane and the electronic state is two-dimensional. The flower-shaped circular dichroism patterns in the angular distribution occurring around the Fermi level of SrTiO3:Nb and around the Dirac point of CuxBi2Se3 are explained on equal footings. We point out that the penetration depth of the topological states of Cu xBi2Se3 depends on momentum.",

author = "Y. Ishida and H. Kanto and A. Kikkawa and Y. Taguchi and Y. Ito and Y. Ota and K. Okazaki and W. Malaeb and M. Mulazzi and M. Okawa and S. Watanabe and Chen, {C. T.} and M. Kim and C. Bell and Y. Kozuka and Hwang, {H. Y.} and Y. Tokura and S. Shin",

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AU - Taguchi, Y.

AU - Ito, Y.

AU - Ota, Y.

AU - Okazaki, K.

AU - Malaeb, W.

AU - Mulazzi, M.

AU - Okawa, M.

AU - Watanabe, S.

AU - Chen, C. T.

AU - Kim, M.

AU - Bell, C.

AU - Kozuka, Y.

AU - Hwang, H. Y.

AU - Tokura, Y.

AU - Shin, S.

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N2 - Circular dichroism in the angular distribution of photoelectrons from SrTiO3:Nb and CuxBi2Se3 is investigated by 7-eV laser angle-resolved photoemission spectroscopy. In addition to the well-known node that occurs in the circular dichroism pattern when the incidence plane matches the mirror plane of the crystal, we show that another type of node occurs when the mirror plane of the crystal is vertical to the incidence plane and the electronic state is two-dimensional. The flower-shaped circular dichroism patterns in the angular distribution occurring around the Fermi level of SrTiO3:Nb and around the Dirac point of CuxBi2Se3 are explained on equal footings. We point out that the penetration depth of the topological states of Cu xBi2Se3 depends on momentum.

AB - Circular dichroism in the angular distribution of photoelectrons from SrTiO3:Nb and CuxBi2Se3 is investigated by 7-eV laser angle-resolved photoemission spectroscopy. In addition to the well-known node that occurs in the circular dichroism pattern when the incidence plane matches the mirror plane of the crystal, we show that another type of node occurs when the mirror plane of the crystal is vertical to the incidence plane and the electronic state is two-dimensional. The flower-shaped circular dichroism patterns in the angular distribution occurring around the Fermi level of SrTiO3:Nb and around the Dirac point of CuxBi2Se3 are explained on equal footings. We point out that the penetration depth of the topological states of Cu xBi2Se3 depends on momentum.

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Common origin of the circular-dichroism pattern in angle-resolved photoemission spectroscopy of SrTiO₃ and Cu_xBi ₂Se₃

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