Magnetic Precursor of the Pressure-Induced Superconductivity in Fe-Ladder Compounds

Songxue Chi, Yoshiya Uwatoko, Huibo Cao, Yasuyuki Hirata, Kazuki Hashizume, Takuya Aoyama, Kenya Ohgushi

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

The pressure effects on the antiferromagentic orders in iron-based ladder compounds CsFe2Se3 and BaFe2S3 have been studied using neutron diffraction. With identical crystal structure and similar magnetic structures, the two compounds exhibit highly contrasting magnetic behaviors under moderate external pressures. In CsFe2Se3 the ladders are brought much closer to each other by pressure, but the stripe-type magnetic order shows no observable change. In contrast, the stripe order in BaFe2S3 undergoes a quantum phase transition where an abrupt increase of Néel temperature by more than 50% occurs at about 1 GPa, accompanied by a jump in the ordered moment. With its spin structure unchanged, BaFe2S3 enters an enhanced magnetic phase that bears the characteristics of an orbital selective Mott phase, which is the true neighbor of superconductivity emerging at higher pressures.

Original languageEnglish
Article number047003
JournalPhysical Review Letters
Volume117
Issue number4
DOIs
Publication statusPublished - 2016 Jul 21

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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