Quasi one dimensional dirac electrons on the surface of Ru2 Sn3

Q. D. Gibson; D. Evtushinsky; A. N. Yaresko; V. B. Zabolotnyy; Mazhar N. Ali; M. K. Fuccillo; J. Van Den Brink; B. Büchner; R. J. Cava; S. V. Borisenko

doi:10.1038/srep05168

Quasi one dimensional dirac electrons on the surface of Ru₂ Sn₃

Q. D. Gibson, D. Evtushinsky, A. N. Yaresko, V. B. Zabolotnyy, Mazhar N. Ali, M. K. Fuccillo, J. Van Den Brink, B. Büchner, R. J. Cava, S. V. Borisenko

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18 Scopus citations

Abstract

We present an ARPES study of the surface states of Ru 2 Sn 3, a new type of a strong 3D topological insulator (TI). In contrast to currently known 3D TIs, which display two-dimensional Dirac cones with linear isotropic dispersions crossing through one point in the surface Brillouin Zone (SBZ), the surface states on Ru 2 Sn 3 are highly anisotropic, displaying an almost flat dispersion along certain high-symmetry directions. This results in quasi-one dimensional (1D) Dirac electronic states throughout the SBZ that we argue are inherited from features in the bulk electronic structure of Ru₂ Sn₃ where the bulk conduction bands are highly anisotropic. Unlike previous experimentally characterized TIs, the topological surface states of Ru ₂ Sn₃ are the result of a d-p band inversion rather than an s-p band inversion. The observed surface states are the topological equivalent to a single 2D Dirac cone at the surface Brillouin zone.

Original language	English (US)
Article number	5168
Journal	Scientific reports
Volume	4
DOIs	https://doi.org/10.1038/srep05168
State	Published - Jun 4 2014

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title = "Quasi one dimensional dirac electrons on the surface of Ru2 Sn3",

abstract = "We present an ARPES study of the surface states of Ru 2 Sn 3, a new type of a strong 3D topological insulator (TI). In contrast to currently known 3D TIs, which display two-dimensional Dirac cones with linear isotropic dispersions crossing through one point in the surface Brillouin Zone (SBZ), the surface states on Ru 2 Sn 3 are highly anisotropic, displaying an almost flat dispersion along certain high-symmetry directions. This results in quasi-one dimensional (1D) Dirac electronic states throughout the SBZ that we argue are inherited from features in the bulk electronic structure of Ru2 Sn3 where the bulk conduction bands are highly anisotropic. Unlike previous experimentally characterized TIs, the topological surface states of Ru 2 Sn3 are the result of a d-p band inversion rather than an s-p band inversion. The observed surface states are the topological equivalent to a single 2D Dirac cone at the surface Brillouin zone.",

author = "Gibson, {Q. D.} and D. Evtushinsky and Yaresko, {A. N.} and Zabolotnyy, {V. B.} and Ali, {Mazhar N.} and Fuccillo, {M. K.} and {Van Den Brink}, J. and B. B{\"u}chner and Cava, {R. J.} and Borisenko, {S. V.}",

note = "Funding Information: The research at Princeton was supported by the ARO Sponsored MURI on superconductivity, grant W911NF-12-1-0461. The research in Dresden was supported by the DFG grants BO1912/3-1, BO1912/2-2 and ZA 654/1-1.",

year = "2014",

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doi = "10.1038/srep05168",

language = "English (US)",

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T1 - Quasi one dimensional dirac electrons on the surface of Ru2 Sn3

AU - Gibson, Q. D.

AU - Evtushinsky, D.

AU - Yaresko, A. N.

AU - Zabolotnyy, V. B.

AU - Ali, Mazhar N.

AU - Fuccillo, M. K.

AU - Van Den Brink, J.

AU - Büchner, B.

AU - Cava, R. J.

AU - Borisenko, S. V.

N1 - Funding Information: The research at Princeton was supported by the ARO Sponsored MURI on superconductivity, grant W911NF-12-1-0461. The research in Dresden was supported by the DFG grants BO1912/3-1, BO1912/2-2 and ZA 654/1-1.

PY - 2014/6/4

Y1 - 2014/6/4

N2 - We present an ARPES study of the surface states of Ru 2 Sn 3, a new type of a strong 3D topological insulator (TI). In contrast to currently known 3D TIs, which display two-dimensional Dirac cones with linear isotropic dispersions crossing through one point in the surface Brillouin Zone (SBZ), the surface states on Ru 2 Sn 3 are highly anisotropic, displaying an almost flat dispersion along certain high-symmetry directions. This results in quasi-one dimensional (1D) Dirac electronic states throughout the SBZ that we argue are inherited from features in the bulk electronic structure of Ru2 Sn3 where the bulk conduction bands are highly anisotropic. Unlike previous experimentally characterized TIs, the topological surface states of Ru 2 Sn3 are the result of a d-p band inversion rather than an s-p band inversion. The observed surface states are the topological equivalent to a single 2D Dirac cone at the surface Brillouin zone.

AB - We present an ARPES study of the surface states of Ru 2 Sn 3, a new type of a strong 3D topological insulator (TI). In contrast to currently known 3D TIs, which display two-dimensional Dirac cones with linear isotropic dispersions crossing through one point in the surface Brillouin Zone (SBZ), the surface states on Ru 2 Sn 3 are highly anisotropic, displaying an almost flat dispersion along certain high-symmetry directions. This results in quasi-one dimensional (1D) Dirac electronic states throughout the SBZ that we argue are inherited from features in the bulk electronic structure of Ru2 Sn3 where the bulk conduction bands are highly anisotropic. Unlike previous experimentally characterized TIs, the topological surface states of Ru 2 Sn3 are the result of a d-p band inversion rather than an s-p band inversion. The observed surface states are the topological equivalent to a single 2D Dirac cone at the surface Brillouin zone.

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Quasi one dimensional dirac electrons on the surface of Ru₂ Sn₃

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