Competing electronic phases near the onset of superconductivity in hole-doped SrFe2As2

• Verfasst von: Wang, Liran [VerfasserIn]
• Titel: Competing electronic phases near the onset of superconductivity in hole-doped SrFe2As2
• Verf.angabe: Liran Wang, Mingquan He, Daniel D. Scherer, Frédéric Hardy, Peter Schweiss, Thomas Wolf, Michael Merz, Brian M. Andersen, and Christoph Meingast
• E-Jahr: 2019
• Jahr: September 26, 2019
• Umfang: 5 S.
• Fussnoten: Gesehen am 24.10.2019 ; Die Zahl "2" ist im Titel tiefgestellt
• Titel Quelle: Enthalten in: Nihon-Butsuri-GakkaiJournal of the Physical Society of Japan
• Ort Quelle: Tokyo : The Physical Society of Japan, 1946
• Jahr Quelle: 2019
• Band/Heft Quelle: 88(2019,10) Artikel-Nummer 104710, 5 Seiten
• ISSN Quelle: 1347-4073
• DOI: doi:10.7566/JPSJ.88.104710
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1679552856

Abstract

An intriguingly complex phase diagram of Na-doped SrFe2As2 is uncovered using high-resolution thermal-expansion, magnetization, and heat-capacity measurements. The detailed temperature dependence of the orthorhombic distortion and the anisotropy of the uniform magnetic susceptibility provide evidence for nine distinct electronic phases near the transition region between stripe antiferromagnetism and unconventional superconductivity. In particular, we report the finding of a new magnetic phase which competes surprisingly strongly with superconductivity. From theoretical studies we propose that this phase is a double-Q phase consisting of a mixture of symmetry-distinct commensurate magnetic orders with a peculiar temperature-dependent magnetic moment reorientation.