Anisotropic resonance modes emerging in an antiferromagnetic superconducting state

Abstract Two strong arguments in favor of magnetically driven unconventional superconductivity arise from the coexistence and closeness of superconducting and magnetically ordered phases on the one hand, and from the emergence of magnetic spin-resonance modes at the superconducting transition on the...

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Autores principales:	F. Waßer, C. H. Lee, K. Kihou, P. Steffens, K. Schmalzl, N. Qureshi, M. Braden
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/72e9450e18c34ec99cd5a2dae2ec778d
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spelling	oai:doaj.org-article:72e9450e18c34ec99cd5a2dae2ec778d2021-12-02T15:05:53ZAnisotropic resonance modes emerging in an antiferromagnetic superconducting state10.1038/s41598-017-10208-12045-2322https://doaj.org/article/72e9450e18c34ec99cd5a2dae2ec778d2017-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-10208-1https://doaj.org/toc/2045-2322Abstract Two strong arguments in favor of magnetically driven unconventional superconductivity arise from the coexistence and closeness of superconducting and magnetically ordered phases on the one hand, and from the emergence of magnetic spin-resonance modes at the superconducting transition on the other hand. Combining these two arguments one may ask about the nature of superconducting spin-resonance modes occurring in an antiferromagnetic state. This problem can be studied in underdoped BaFe2 As2, for which the local coexistence of large moment antiferromagnetism and superconductivity is well established by local probes. However, polarized neutron scattering experiments are required to identify the nature of the resonance modes. In the normal state of Co underdoped BaFe2 As2 the antiferromagnetic order results in broad magnetic gaps opening in all three spin directions that are reminiscent of the magnetic response in the parent compound. In the superconducting state two distinct anisotropic resonance excitations emerge, but in contrast to numerous studies on optimum and over-doped BaFe2 As2 there is no isotropic resonance excitation. The two anisotropic resonance modes appearing within the antiferromagnetic phase are attributed to a band selective superconducting state, in which longitudinal magnetic excitations are gapped by antiferromagnetic order with sizable moment.F. WaßerC. H. LeeK. KihouP. SteffensK. SchmalzlN. QureshiM. BradenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q F. Waßer C. H. Lee K. Kihou P. Steffens K. Schmalzl N. Qureshi M. Braden Anisotropic resonance modes emerging in an antiferromagnetic superconducting state
description	Abstract Two strong arguments in favor of magnetically driven unconventional superconductivity arise from the coexistence and closeness of superconducting and magnetically ordered phases on the one hand, and from the emergence of magnetic spin-resonance modes at the superconducting transition on the other hand. Combining these two arguments one may ask about the nature of superconducting spin-resonance modes occurring in an antiferromagnetic state. This problem can be studied in underdoped BaFe2 As2, for which the local coexistence of large moment antiferromagnetism and superconductivity is well established by local probes. However, polarized neutron scattering experiments are required to identify the nature of the resonance modes. In the normal state of Co underdoped BaFe2 As2 the antiferromagnetic order results in broad magnetic gaps opening in all three spin directions that are reminiscent of the magnetic response in the parent compound. In the superconducting state two distinct anisotropic resonance excitations emerge, but in contrast to numerous studies on optimum and over-doped BaFe2 As2 there is no isotropic resonance excitation. The two anisotropic resonance modes appearing within the antiferromagnetic phase are attributed to a band selective superconducting state, in which longitudinal magnetic excitations are gapped by antiferromagnetic order with sizable moment.
format	article
author	F. Waßer C. H. Lee K. Kihou P. Steffens K. Schmalzl N. Qureshi M. Braden
author_facet	F. Waßer C. H. Lee K. Kihou P. Steffens K. Schmalzl N. Qureshi M. Braden
author_sort	F. Waßer
title	Anisotropic resonance modes emerging in an antiferromagnetic superconducting state
title_short	Anisotropic resonance modes emerging in an antiferromagnetic superconducting state
title_full	Anisotropic resonance modes emerging in an antiferromagnetic superconducting state
title_fullStr	Anisotropic resonance modes emerging in an antiferromagnetic superconducting state
title_full_unstemmed	Anisotropic resonance modes emerging in an antiferromagnetic superconducting state
title_sort	anisotropic resonance modes emerging in an antiferromagnetic superconducting state
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/72e9450e18c34ec99cd5a2dae2ec778d
work_keys_str_mv	AT fwaßer anisotropicresonancemodesemerginginanantiferromagneticsuperconductingstate AT chlee anisotropicresonancemodesemerginginanantiferromagneticsuperconductingstate AT kkihou anisotropicresonancemodesemerginginanantiferromagneticsuperconductingstate AT psteffens anisotropicresonancemodesemerginginanantiferromagneticsuperconductingstate AT kschmalzl anisotropicresonancemodesemerginginanantiferromagneticsuperconductingstate AT nqureshi anisotropicresonancemodesemerginginanantiferromagneticsuperconductingstate AT mbraden anisotropicresonancemodesemerginginanantiferromagneticsuperconductingstate
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Anisotropic resonance modes emerging in an antiferromagnetic superconducting state

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