Superconductivity of highly spin-polarized electrons in FeSe probed by Se-77 NMR

doi:10.1103/PhysRevB.104.014504

	Superconductivity of highly spin-polarized electrons in FeSe probed by Se-77 NMR
	Molatta, S.1,2,3; Opherden, D.1,2,3; Wosnitza, J.1,2,3; Opherden, L.1,2,3; Zhang, Z. T.1,2,4; Wolf, T.5; Loehneysen, H., V 5,6; Sarkar, R.3; Biswas, P. K.7; Grafe, H-J 8
刊名	PHYSICAL REVIEW B
	2021-07-12
卷号	104
ISSN号	2469-9950
DOI	10.1103/PhysRevB.104.014504
通讯作者	Kuehne, H.(h.kuehne@hzdr.de)
英文摘要	A number of recent experiments indicate that the iron-chalcogenide FeSe provides the long-sought possibility to study bulk superconductivity in the cross-over regime between the weakly coupled Bardeen-Cooper-Schrieffer (BCS) pairing and the strongly coupled Bose-Einstein condensation (BEC). We report on Se-77 nuclear magnetic resonance experiments of FeSe, focused on the superconducting phase for strong magnetic fields applied along the c axis, where a distinct state with large spin polarization was reported. We determine this high-field state as bulk superconducting with high spatial homogeneity of the low-energy spin fluctuations. Further, we find that the static spin susceptibility becomes unusually small at temperatures approaching the superconducting state, despite the presence of pronounced spin fluctuations. Taken together, our results clearly indicate that FeSe indeed features an unusual field-induced superconducting state of a highly spin-polarized Fermi liquid in the BCS-BEC crossover regime.
资助项目	Deutsche Forschungsgemeinschaft (DFG)[GRK 1621] ; Wurzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter-ct.qmat (EXC 2147)[390858490] ; HLD at HZDR ; National Natural Science Foundation of China[11304321] ; International Postdoctoral Exchange Fellowship Program 2013[20130025]
WOS关键词	HIGH-TEMPERATURE SUPERCONDUCTIVITY ; PHASE-DIAGRAM ; NEMATICITY
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000672757900004
资助机构	Deutsche Forschungsgemeinschaft (DFG) ; Wurzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter-ct.qmat (EXC 2147) ; HLD at HZDR ; National Natural Science Foundation of China ; International Postdoctoral Exchange Fellowship Program 2013
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/123454]
专题	中国科学院合肥物质科学研究院
通讯作者	Kuehne, H.
作者单位	1.Helmholtz Zentrum Dresden Rossendolf, Wurzburg Dresden Cluster Excellence Ctqmat, D-01328 Dresden, Germany 2.Helmholtz Zentrum Dresden Rossendolf, Hochfeld Magnetlab Dresden HLD EMFL, D-01328 Dresden, Germany 3.Tech Univ Dresden, Inst Festkorper & Mat Phys, D-01062 Dresden, Germany 4.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, Hefei 230031, Peoples R China 5.Karlsruher Inst Technol, Inst Quantenmat & Technol, D-76021 Karlsruhe, Germany 6.Karlsruher Inst Technol, Phys Inst, D-76049 Karlsruhe, Germany 7.Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England 8.IFW Dresden, Inst Solid State Res, D-01171 Dresden, Germany
推荐引用方式 GB/T 7714	Molatta, S.,Opherden, D.,Wosnitza, J.,et al. Superconductivity of highly spin-polarized electrons in FeSe probed by Se-77 NMR[J]. PHYSICAL REVIEW B,2021,104.
APA	Molatta, S..,Opherden, D..,Wosnitza, J..,Opherden, L..,Zhang, Z. T..,...&Kuehne, H..(2021).Superconductivity of highly spin-polarized electrons in FeSe probed by Se-77 NMR.PHYSICAL REVIEW B,104.
MLA	Molatta, S.,et al."Superconductivity of highly spin-polarized electrons in FeSe probed by Se-77 NMR".PHYSICAL REVIEW B 104(2021).