Ferromagnetic Peierls insulator state in AMg4Mn6O15(A = K, Rb, Cs)

T. Yamaguchi, K. Sugimoto, Y. Ohta, Y. Tanaka, H. Sato

Research output: Contribution to journalArticlepeer-review

Abstract

Using the density-functional-theory based electronic structure calculations, we study the electronic state of recently discovered mixed-valent manganese oxides AMg4Mn6O15 (A = K, Rb, Cs), which are fully spin-polarized ferromagnetic insulators with a cubic crystal structure. We show that the system may be described as a three-dimensional arrangement of the one-dimensional chains of a 2p orbital of O and a 3d orbital ofMn running along the three axes of the cubic lattice. We thereby argue that in the ground state the chains are fully spin polarized due to the double-exchange mechanism and are distorted by the Peierls mechanism to make the system insulating.

Original languageEnglish
JournalUnknown Journal
Publication statusPublished - 2018 Feb 19
Externally publishedYes

ASJC Scopus subject areas

  • General

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