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Spin-triplet superconductivity in K(2)Cr(3)As(3)

A spin-triplet superconductor can harbor Majorana bound states that can be used in topological quantum computing. Recently, K(2)Cr(3)As(3) and its variants with critical temperature T(c) as high as 8 kelvin have emerged as a new class of superconductors with ferromagnetic spin fluctuations. Here, we...

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Autores principales: Yang, Jie, Luo, Jun, Yi, Changjiang, Shi, Youguo, Zhou, Yi, Zheng, Guo-qing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8694604/
https://www.ncbi.nlm.nih.gov/pubmed/34936458
http://dx.doi.org/10.1126/sciadv.abl4432
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author Yang, Jie
Luo, Jun
Yi, Changjiang
Shi, Youguo
Zhou, Yi
Zheng, Guo-qing
author_facet Yang, Jie
Luo, Jun
Yi, Changjiang
Shi, Youguo
Zhou, Yi
Zheng, Guo-qing
author_sort Yang, Jie
collection PubMed
description A spin-triplet superconductor can harbor Majorana bound states that can be used in topological quantum computing. Recently, K(2)Cr(3)As(3) and its variants with critical temperature T(c) as high as 8 kelvin have emerged as a new class of superconductors with ferromagnetic spin fluctuations. Here, we report a discovery in K(2)Cr(3)As(3) single crystal that the spin susceptibility measured by (75)As Knight shift below T(c) is unchanged with the magnetic field H(0) applied in the ab plane but vanishes toward zero temperature when H(0) is along the c axis, which unambiguously establishes this compound as a spin-triplet superconductor described by a vector order parameter [Formula: see text] parallel to the c axis. Combining with point nodal gap, we show that K(2)Cr(3)As(3) is a new platform for the study of topological superconductivity and its possible technical application.
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spelling pubmed-86946042022-01-03 Spin-triplet superconductivity in K(2)Cr(3)As(3) Yang, Jie Luo, Jun Yi, Changjiang Shi, Youguo Zhou, Yi Zheng, Guo-qing Sci Adv Physical and Materials Sciences A spin-triplet superconductor can harbor Majorana bound states that can be used in topological quantum computing. Recently, K(2)Cr(3)As(3) and its variants with critical temperature T(c) as high as 8 kelvin have emerged as a new class of superconductors with ferromagnetic spin fluctuations. Here, we report a discovery in K(2)Cr(3)As(3) single crystal that the spin susceptibility measured by (75)As Knight shift below T(c) is unchanged with the magnetic field H(0) applied in the ab plane but vanishes toward zero temperature when H(0) is along the c axis, which unambiguously establishes this compound as a spin-triplet superconductor described by a vector order parameter [Formula: see text] parallel to the c axis. Combining with point nodal gap, we show that K(2)Cr(3)As(3) is a new platform for the study of topological superconductivity and its possible technical application. American Association for the Advancement of Science 2021-12-22 /pmc/articles/PMC8694604/ /pubmed/34936458 http://dx.doi.org/10.1126/sciadv.abl4432 Text en Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Physical and Materials Sciences
Yang, Jie
Luo, Jun
Yi, Changjiang
Shi, Youguo
Zhou, Yi
Zheng, Guo-qing
Spin-triplet superconductivity in K(2)Cr(3)As(3)
title Spin-triplet superconductivity in K(2)Cr(3)As(3)
title_full Spin-triplet superconductivity in K(2)Cr(3)As(3)
title_fullStr Spin-triplet superconductivity in K(2)Cr(3)As(3)
title_full_unstemmed Spin-triplet superconductivity in K(2)Cr(3)As(3)
title_short Spin-triplet superconductivity in K(2)Cr(3)As(3)
title_sort spin-triplet superconductivity in k(2)cr(3)as(3)
topic Physical and Materials Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8694604/
https://www.ncbi.nlm.nih.gov/pubmed/34936458
http://dx.doi.org/10.1126/sciadv.abl4432
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