Decoupling of lattice and orbital degrees of freedom in an iron-pnictide superconductor

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • C. E. Matt
  • O. Ivashko
  • M. Horio
  • J. Choi
  • Q. Wang
  • D. Sutter
  • N. Dennler
  • M. H. Fischer
  • S. Katrych
  • L. Forro
  • B. Fu
  • B. Q. Lv
  • M. v. Zimmermann
  • T. K. Kim
  • N. C. Plumb
  • N. Xu
  • M. Shi
  • J. Chang

Detail(s)

Original languageEnglish
Article number023220
Journal / PublicationPhysical Review Research
Volume3
Issue number2
Online published21 Jun 2021
Publication statusPublished - Jun 2021
Externally publishedYes

Link(s)

Abstract

The interplay between structural and electronic phases in iron-based superconductors is a central theme in the search for the superconducting pairing mechanism. While electronic nematicity is competing with superconductivity, the effect of purely structural orthorhombic order is unexplored. Here, using x-ray diffraction and angle-resolved photoemission spectroscopy, we reveal a structural orthorhombic phase in the electron-doped iron-pnictide superconductor Pr4Fe2As2Te0.88O(Tc = 25 K), which is distinct from orthorhombicity in the nematic phase in underdoped pnictides. Despite the high electron doping we find an exceptionally high orthorhombic onset temperature (Tort∼250 K), no signatures of phase competition with superconductivity, and absence of electronic nematic order as the driving mechanism for orthorhombicity. Combined, our results establish a high-temperature phase in the phase diagram of iron-pnictide superconductors and impose strong constraints for the modeling of their superconducting pairing mechanism.

Research Area(s)

  • cond-mat.supr-con, cond-mat.str-el

Citation Format(s)

Decoupling of lattice and orbital degrees of freedom in an iron-pnictide superconductor. / Matt, C. E.; Ivashko, O.; Horio, M.; Choi, J.; Wang, Q.; Sutter, D.; Dennler, N.; Fischer, M. H.; Katrych, S.; Forro, L.; Ma, J.; Fu, B.; Lv, B. Q.; Zimmermann, M. v.; Kim, T. K.; Plumb, N. C. ; Xu, N.; Shi, M.; Chang, J.

In: Physical Review Research, Vol. 3, No. 2, 023220, 06.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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