Nakayama, K, Kimizuka, H, Tanaka, Y et al. (6 more authors) (2015) Observation of two-dimensional bulk electronic states in the superconducting topological insulator heterostructure Cuₓ(PbSe)₅(Bi₂Se₃)₆: Implications for unconventional superconductivity. Physical Review B, 92 (10). ARTN 100508. ISSN 2469-9950
Abstract
We have performed angle-resolved photoemission spectroscopy (ARPES) on Cuₓ(PbSe)₅(Bi₂Se₃)₆ [(CPSBS); x=1.47], a superconductor derived from a topological insulator heterostructure, to elucidate the electronic states relevant to the occurrence of possible unconventional superconductivity. Upon Cu intercalation into the parent compound (PbSe)₅(Bi₂Se₃)₆, we observed a distinct energy shift of the bulk conduction band due to electron doping. Photon-energy-dependent ARPES measurements of CPSBS revealed that the observed bulk band forms a cylindrical electronlike Fermi surface at the Brillouin-zone center. The two-dimensional nature of the bulk electronic states puts strong constraints on the possible topological character of the superconducting state in CPSBS.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Condensed Matter (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 12 Sep 2016 15:48 |
Last Modified: | 04 Nov 2016 07:36 |
Published Version: | http://dx.doi.org/10.1103/PhysRevB.92.100508 |
Status: | Published |
Publisher: | American Physical Society |
Identification Number: | 10.1103/PhysRevB.92.100508 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:96663 |