Surface states in lightly hole-doped sodium cobaltate Na1-y CoO2

Meng Yu Yao; Lin Miao; N. L. Wang; J. H. Dil; M. Z. Hasan; D. D. Guan; C. L. Gao; Canhua Liu; Dong Qian; Jin Feng Jia

doi:10.1103/PhysRevB.91.161411

Surface states in lightly hole-doped sodium cobaltate Na1-y CoO2

Meng Yu Yao, Lin Miao, N. L. Wang, J. H. Dil, M. Z. Hasan, D. D. Guan, C. L. Gao, Canhua Liu, Dong Qian, Jin Feng Jia

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

3 Scopus citations

Abstract

Using high-resolution angle-resolved photoemission spectroscopy (ARPES), surface states that were proposed to be useful for constructing the topological superconducting state in sodium cobaltates are experimentally explored. Two energy bands are observed to cross the Fermi level in the large x region. Through in situ surface electron doping, temperature-dependent ARPES measurements, and spin-resolved ARPES measurements, we demonstrate the existence of surface states due to less Na on the surface than in the bulk, as predicted in theory.

Original language	English (US)
Article number	161411
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	91
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevB.91.161411
State	Published - Apr 24 2015

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.91.161411

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title = "Surface states in lightly hole-doped sodium cobaltate Na1-y CoO2",

abstract = "Using high-resolution angle-resolved photoemission spectroscopy (ARPES), surface states that were proposed to be useful for constructing the topological superconducting state in sodium cobaltates are experimentally explored. Two energy bands are observed to cross the Fermi level in the large x region. Through in situ surface electron doping, temperature-dependent ARPES measurements, and spin-resolved ARPES measurements, we demonstrate the existence of surface states due to less Na on the surface than in the bulk, as predicted in theory.",

author = "Yao, {Meng Yu} and Lin Miao and Wang, {N. L.} and Dil, {J. H.} and Hasan, {M. Z.} and Guan, {D. D.} and Gao, {C. L.} and Canhua Liu and Dong Qian and Jia, {Jin Feng}",

note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",

year = "2015",

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doi = "10.1103/PhysRevB.91.161411",

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T1 - Surface states in lightly hole-doped sodium cobaltate Na1-y CoO2

AU - Yao, Meng Yu

AU - Miao, Lin

AU - Wang, N. L.

AU - Dil, J. H.

AU - Hasan, M. Z.

AU - Guan, D. D.

AU - Gao, C. L.

AU - Liu, Canhua

AU - Qian, Dong

AU - Jia, Jin Feng

PY - 2015/4/24

Y1 - 2015/4/24

N2 - Using high-resolution angle-resolved photoemission spectroscopy (ARPES), surface states that were proposed to be useful for constructing the topological superconducting state in sodium cobaltates are experimentally explored. Two energy bands are observed to cross the Fermi level in the large x region. Through in situ surface electron doping, temperature-dependent ARPES measurements, and spin-resolved ARPES measurements, we demonstrate the existence of surface states due to less Na on the surface than in the bulk, as predicted in theory.

AB - Using high-resolution angle-resolved photoemission spectroscopy (ARPES), surface states that were proposed to be useful for constructing the topological superconducting state in sodium cobaltates are experimentally explored. Two energy bands are observed to cross the Fermi level in the large x region. Through in situ surface electron doping, temperature-dependent ARPES measurements, and spin-resolved ARPES measurements, we demonstrate the existence of surface states due to less Na on the surface than in the bulk, as predicted in theory.

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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

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ER -

Surface states in lightly hole-doped sodium cobaltate Na1-y CoO2

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