Surface versus bulk Dirac state tuning in a three-dimensional topological Dirac semimetal

Madhab Neupane; Su Yang Xu; Nasser Alidoust; Raman Sankar; Ilya Belopolski; Daniel S. Sanchez; Guang Bian; Chang Liu; Tay Rong Chang; Horng Tay Jeng; Baokai Wang; Guoqing Chang; Hsin Lin; Arun Bansil; Fangcheng Chou; M. Zahid Hasan

doi:10.1103/PhysRevB.91.241114

Surface versus bulk Dirac state tuning in a three-dimensional topological Dirac semimetal

Madhab Neupane, Su Yang Xu, Nasser Alidoust, Raman Sankar, Ilya Belopolski, Daniel S. Sanchez, Guang Bian, Chang Liu, Tay Rong Chang, Horng Tay Jeng, Baokai Wang, Guoqing Chang, Hsin Lin, Arun Bansil, Fangcheng Chou, M. Zahid Hasan

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16 Scopus citations

Abstract

Recently, a crystalline-symmetry-protected three-dimensional (3D) bulk Dirac semimetal phase has been experimentally identified in a stoichiometric high-mobility compound, Cd3As2. The Dirac state observed in Cd3As2 has been attributed to originate mostly from the bulk state while calculations show that the bulk and surface states overlap over the entire Dirac dispersion energy range. In this study we unambiguously reveal doping induced evolution of the ground state of surface and bulk electron dynamics in a 3D Dirac semimetal. The technique demonstrated in this study by simultaneously using angle-resolved photoemission spectroscopy (ARPES) and in situ surface deposition isolates the surface and bulk states in Cd3As2. Our experimental results provide a method for tuning the chemical potential as well as to observe surface states degenerate with bulk states, which will be useful for future applications of a 3D Dirac semimetal.

Original language	English (US)
Article number	241114
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	91
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevB.91.241114
State	Published - Jun 24 2015

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Neupane, M., Xu, S. Y., Alidoust, N., Sankar, R., Belopolski, I., Sanchez, D. S., Bian, G., Liu, C., Chang, T. R., Jeng, H. T., Wang, B., Chang, G., Lin, H., Bansil, A., Chou, F., & Hasan, M. Z. (2015). Surface versus bulk Dirac state tuning in a three-dimensional topological Dirac semimetal. Physical Review B - Condensed Matter and Materials Physics, 91(24), Article 241114. https://doi.org/10.1103/PhysRevB.91.241114

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title = "Surface versus bulk Dirac state tuning in a three-dimensional topological Dirac semimetal",

abstract = "Recently, a crystalline-symmetry-protected three-dimensional (3D) bulk Dirac semimetal phase has been experimentally identified in a stoichiometric high-mobility compound, Cd3As2. The Dirac state observed in Cd3As2 has been attributed to originate mostly from the bulk state while calculations show that the bulk and surface states overlap over the entire Dirac dispersion energy range. In this study we unambiguously reveal doping induced evolution of the ground state of surface and bulk electron dynamics in a 3D Dirac semimetal. The technique demonstrated in this study by simultaneously using angle-resolved photoemission spectroscopy (ARPES) and in situ surface deposition isolates the surface and bulk states in Cd3As2. Our experimental results provide a method for tuning the chemical potential as well as to observe surface states degenerate with bulk states, which will be useful for future applications of a 3D Dirac semimetal.",

author = "Madhab Neupane and Xu, {Su Yang} and Nasser Alidoust and Raman Sankar and Ilya Belopolski and Sanchez, {Daniel S.} and Guang Bian and Chang Liu and Chang, {Tay Rong} and Jeng, {Horng Tay} and Baokai Wang and Guoqing Chang and Hsin Lin and Arun Bansil and Fangcheng Chou and Hasan, {M. Zahid}",

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doi = "10.1103/PhysRevB.91.241114",

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Neupane, M, Xu, SY, Alidoust, N, Sankar, R, Belopolski, I, Sanchez, DS, Bian, G, Liu, C, Chang, TR, Jeng, HT, Wang, B, Chang, G, Lin, H, Bansil, A, Chou, F & Hasan, MZ 2015, 'Surface versus bulk Dirac state tuning in a three-dimensional topological Dirac semimetal', Physical Review B - Condensed Matter and Materials Physics, vol. 91, no. 24, 241114. https://doi.org/10.1103/PhysRevB.91.241114

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AU - Neupane, Madhab

AU - Xu, Su Yang

AU - Alidoust, Nasser

AU - Sankar, Raman

AU - Belopolski, Ilya

AU - Sanchez, Daniel S.

AU - Bian, Guang

AU - Liu, Chang

AU - Chang, Tay Rong

AU - Jeng, Horng Tay

AU - Wang, Baokai

AU - Chang, Guoqing

AU - Lin, Hsin

AU - Bansil, Arun

AU - Chou, Fangcheng

AU - Hasan, M. Zahid

PY - 2015/6/24

Y1 - 2015/6/24

N2 - Recently, a crystalline-symmetry-protected three-dimensional (3D) bulk Dirac semimetal phase has been experimentally identified in a stoichiometric high-mobility compound, Cd3As2. The Dirac state observed in Cd3As2 has been attributed to originate mostly from the bulk state while calculations show that the bulk and surface states overlap over the entire Dirac dispersion energy range. In this study we unambiguously reveal doping induced evolution of the ground state of surface and bulk electron dynamics in a 3D Dirac semimetal. The technique demonstrated in this study by simultaneously using angle-resolved photoemission spectroscopy (ARPES) and in situ surface deposition isolates the surface and bulk states in Cd3As2. Our experimental results provide a method for tuning the chemical potential as well as to observe surface states degenerate with bulk states, which will be useful for future applications of a 3D Dirac semimetal.

AB - Recently, a crystalline-symmetry-protected three-dimensional (3D) bulk Dirac semimetal phase has been experimentally identified in a stoichiometric high-mobility compound, Cd3As2. The Dirac state observed in Cd3As2 has been attributed to originate mostly from the bulk state while calculations show that the bulk and surface states overlap over the entire Dirac dispersion energy range. In this study we unambiguously reveal doping induced evolution of the ground state of surface and bulk electron dynamics in a 3D Dirac semimetal. The technique demonstrated in this study by simultaneously using angle-resolved photoemission spectroscopy (ARPES) and in situ surface deposition isolates the surface and bulk states in Cd3As2. Our experimental results provide a method for tuning the chemical potential as well as to observe surface states degenerate with bulk states, which will be useful for future applications of a 3D Dirac semimetal.

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Surface versus bulk Dirac state tuning in a three-dimensional topological Dirac semimetal

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