Common Origin of the Circular-Dichroism Pattern in Angle-Resolved Photoemission Spectroscopy of SrTiO3 and CuxBi2Se3

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; Chris Bell

doi:10.1103/PhysRevLett.107.077601

Common Origin of the Circular-Dichroism Pattern in Angle-Resolved Photoemission Spectroscopy of SrTiO3 and CuxBi2Se3

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, Chris Bell

^*Corresponding author for this work

School of Physics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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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 CuxBi2Se3 depends on momentum.

Original language	English
Article number	077601
Number of pages	4
Journal	Physical Review Letters
Volume	107
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.107.077601
Publication status	Published - 9 Aug 2011

Keywords

SINGLE DIRAC CONE
TOPOLOGICAL-INSULATOR
ANGULAR-DISTRIBUTIONS
VALENCE-BAND
SURFACE

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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., & Bell, C. (2011). Common Origin of the Circular-Dichroism Pattern in Angle-Resolved Photoemission Spectroscopy of SrTiO3 and CuxBi2Se3. Physical Review Letters, 107(7), Article 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 CuxBi2Se3",

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 CuxBi2Se3 depends on momentum.",

keywords = "SINGLE DIRAC CONE, TOPOLOGICAL-INSULATOR, ANGULAR-DISTRIBUTIONS, VALENCE-BAND, SURFACE",

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 and Chris Bell",

year = "2011",

month = aug,

day = "9",

doi = "10.1103/PhysRevLett.107.077601",

language = "English",

volume = "107",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society (APS)",

number = "7",

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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, HY, Tokura, Y, Shin, S & Bell, C 2011, 'Common Origin of the Circular-Dichroism Pattern in Angle-Resolved Photoemission Spectroscopy of SrTiO3 and CuxBi2Se3', Physical Review Letters, vol. 107, no. 7, 077601. https://doi.org/10.1103/PhysRevLett.107.077601

TY - JOUR

T1 - Common Origin of the Circular-Dichroism Pattern in Angle-Resolved Photoemission Spectroscopy of SrTiO3 and CuxBi2Se3

AU - Ishida, Y.

AU - Kanto, H.

AU - Kikkawa, A.

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.

AU - Bell, Chris

PY - 2011/8/9

Y1 - 2011/8/9

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 CuxBi2Se3 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 CuxBi2Se3 depends on momentum.

KW - SINGLE DIRAC CONE

KW - TOPOLOGICAL-INSULATOR

KW - ANGULAR-DISTRIBUTIONS

KW - VALENCE-BAND

KW - SURFACE

U2 - 10.1103/PhysRevLett.107.077601

DO - 10.1103/PhysRevLett.107.077601

M3 - Article (Academic Journal)

C2 - 21902429

SN - 0031-9007

VL - 107

JO - Physical Review Letters

JF - Physical Review Letters

IS - 7

M1 - 077601

ER -

Common Origin of the Circular-Dichroism Pattern in Angle-Resolved Photoemission Spectroscopy of SrTiO3 and CuxBi2Se3

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Keywords

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