Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd

Recently, noncentrosymmetric superconductor BiPd has attracted considerable research interest due to the possibility of hosting topological superconductivity. Here we report a systematic high-resolution angle-resolved photoemission spectroscopy (ARPES) and spin-resolved ARPES study of the normal sta...

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Main Authors:	Neupane, Madhab, Alidoust, Nasser, Hosen, M. Mofazzel, Zhu, Jian-Xin, Dimitri, Klauss, Xu, Su-Yang, Dhakal, Nagendra, Sankar, Raman, Belopolski, Ilya, Sanchez, Daniel S., Chang, Tay-Rong, Jeng, Horng-Tay, Miyamoto, Koji, Okuda, Taichi, Lin, Hsin, Bansil, Arun, Kaczorowski, Dariusz, Chou, Fangcheng, Hasan, M. Zahid, Durakiewicz, Tomasz
Format:	Online
Language:	English
Published:	Nature Publishing Group 2016
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5103058/

id	pubmed-5103058
recordtype	oai_dc
spelling	pubmed-51030582016-11-18 Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd Neupane, Madhab Alidoust, Nasser Hosen, M. Mofazzel Zhu, Jian-Xin Dimitri, Klauss Xu, Su-Yang Dhakal, Nagendra Sankar, Raman Belopolski, Ilya Sanchez, Daniel S. Chang, Tay-Rong Jeng, Horng-Tay Miyamoto, Koji Okuda, Taichi Lin, Hsin Bansil, Arun Kaczorowski, Dariusz Chou, Fangcheng Hasan, M. Zahid Durakiewicz, Tomasz Article Recently, noncentrosymmetric superconductor BiPd has attracted considerable research interest due to the possibility of hosting topological superconductivity. Here we report a systematic high-resolution angle-resolved photoemission spectroscopy (ARPES) and spin-resolved ARPES study of the normal state electronic and spin properties of BiPd. Our experimental results show the presence of a surface state at higher-binding energy with the location of Dirac point at around 700 meV below the Fermi level. The detailed photon energy, temperature-dependent and spin-resolved ARPES measurements complemented by our first-principles calculations demonstrate the existence of the spin-polarized surface states at high-binding energy. The absence of such spin-polarized surface states near the Fermi level negates the possibility of a topological superconducting behaviour on the surface. Our direct experimental observation of spin-polarized surface states in BiPd provides critical information that will guide the future search for topological superconductivity in noncentrosymmetric materials. Nature Publishing Group 2016-11-07 /pmc/articles/PMC5103058/ /pubmed/27819655 http://dx.doi.org/10.1038/ncomms13315 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Neupane, Madhab Alidoust, Nasser Hosen, M. Mofazzel Zhu, Jian-Xin Dimitri, Klauss Xu, Su-Yang Dhakal, Nagendra Sankar, Raman Belopolski, Ilya Sanchez, Daniel S. Chang, Tay-Rong Jeng, Horng-Tay Miyamoto, Koji Okuda, Taichi Lin, Hsin Bansil, Arun Kaczorowski, Dariusz Chou, Fangcheng Hasan, M. Zahid Durakiewicz, Tomasz
spellingShingle	Neupane, Madhab Alidoust, Nasser Hosen, M. Mofazzel Zhu, Jian-Xin Dimitri, Klauss Xu, Su-Yang Dhakal, Nagendra Sankar, Raman Belopolski, Ilya Sanchez, Daniel S. Chang, Tay-Rong Jeng, Horng-Tay Miyamoto, Koji Okuda, Taichi Lin, Hsin Bansil, Arun Kaczorowski, Dariusz Chou, Fangcheng Hasan, M. Zahid Durakiewicz, Tomasz Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd
author_facet	Neupane, Madhab Alidoust, Nasser Hosen, M. Mofazzel Zhu, Jian-Xin Dimitri, Klauss Xu, Su-Yang Dhakal, Nagendra Sankar, Raman Belopolski, Ilya Sanchez, Daniel S. Chang, Tay-Rong Jeng, Horng-Tay Miyamoto, Koji Okuda, Taichi Lin, Hsin Bansil, Arun Kaczorowski, Dariusz Chou, Fangcheng Hasan, M. Zahid Durakiewicz, Tomasz
author_sort	Neupane, Madhab
title	Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd
title_short	Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd
title_full	Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd
title_fullStr	Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd
title_full_unstemmed	Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd
title_sort	observation of the spin-polarized surface state in a noncentrosymmetric superconductor bipd
description	Recently, noncentrosymmetric superconductor BiPd has attracted considerable research interest due to the possibility of hosting topological superconductivity. Here we report a systematic high-resolution angle-resolved photoemission spectroscopy (ARPES) and spin-resolved ARPES study of the normal state electronic and spin properties of BiPd. Our experimental results show the presence of a surface state at higher-binding energy with the location of Dirac point at around 700 meV below the Fermi level. The detailed photon energy, temperature-dependent and spin-resolved ARPES measurements complemented by our first-principles calculations demonstrate the existence of the spin-polarized surface states at high-binding energy. The absence of such spin-polarized surface states near the Fermi level negates the possibility of a topological superconducting behaviour on the surface. Our direct experimental observation of spin-polarized surface states in BiPd provides critical information that will guide the future search for topological superconductivity in noncentrosymmetric materials.
publisher	Nature Publishing Group
publishDate	2016
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5103058/
_version_	1613720609801371648

Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd

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