Coupled structural and magnetic antiphase domain walls on BaFe 2As 2

Guorong Li, Xiaobo He, Jiandi Zhang, Rongying Jin, A. S. Sefat, M. A. McGuire, D. G. Mandrus, B. C. Sales, E. W. Plummer

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

High-resolution scanning tunneling microscopy measurements on the (001) surface of BaFe 2As 2, a parent compound of Fe-based high-T c superconductors, reveal a complex surface with coexisting structural phases. Large areas display a squarelike (√2×√2)R45 structure with surface-pinned antiphase domains. The domain walls exhibit C 2 symmetry, in contrast with the bulk C 2v geometric structure. We argue that the strong spin-lattice coupling at the surface results in the coexistence of structure and spin antiphase domain boundaries with C 2 symmetry.

Original languageEnglish
Article number060512
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number6
DOIs
StatePublished - Aug 28 2012

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