You are here

Structural and magnetic phase transitions in Ca(0.73)Le(0.27)FeAs(2) with electron-overdoped FeAs layers

TitleStructural and magnetic phase transitions in Ca(0.73)Le(0.27)FeAs(2) with electron-overdoped FeAs layers
Publication TypeJournal Article
Year of Publication2016
AuthorsJiang, S, Liu, C, Cao, HB, Birol, T, Allred, JM, Tian, W, Liu, L, Cho, K, Krogstad, MJ, Ma, J, Taddei, KM, Tanatar, MA, Hoesch, M, Prozorov, R, Rosenkranz, S, Uemura, YJ, Kotliar, G, Ni, N
JournalPhysical Review B
Volume93
Pagination054522
Date Published02
Type of ArticleArticle
ISBN Number2469-9950
Accession NumberWOS:000370840400008
Keywordsiron, neutron, states, superconductors
Abstract

We report a study of the Ca0.73La0.27FeAs2 single crystals. We unravel a monoclinic to triclinic phase transition at 58 K, and a paramagnetic to stripe antiferromagnetic phase transition at 54 K, below which spins order 45 degrees away from the stripe direction. Furthermore, we demonstrate this material is substantially structurally untwinned at ambient pressure with the formation of spin rotation walls (S walls). Finally, in addition to the central-hole and corner-electron Fermi pockets usually appearing in Fe pnictide superconductors, angle-resolved photoemission measurements resolve a fermiology where an extra electron pocket of mainly As chain character exists at the Brillouin zone edge.

DOI10.1103/PhysRevB.93.054522
Custom 1

Complex States