Electron localization into spin-polaron state in MnSi

TitleElectron localization into spin-polaron state in MnSi
Publication TypeJournal Article
Year of Publication2011
AuthorsStorchak VG, Brewer JH, Lichti RL, Lograsso TA, Schlagel DL
Journal TitlePhysical Review B
Volume83
Pages140404
Date Published04/13
ISBN Number1098-0121
Accession NumberISI:000289488900001
Keywordsbehavior, border, breakdown, ferromagnetism, fluctuations, metals, phase, pressure
Abstract

Strong electron localization into a bound state has been found in both paramagnetic and ferromagnetic states of the transition metal compound MnSi by muon spin-rotation spectroscopy in magnetic fields up to 7 T and from 2 K to room temperature. This bound state, with a characteristic radius R approximate to 0.4 nm and net spin S = 24 +/- 2, is consistent with confinement of the electron's wave function within roughly one lattice cell of MnSi and is suggested to be a spin polaron. Such spin polarons may form due to a strong exchange interaction between itinerant electrons and the magnetic electrons of Mn ions of the same 3d type; as such, they might affect the peculiar electronic and magnetic properties of MnSi.

URL<Go to ISI>://000289488900001
DOI10.1103/PhysRevB.83.140404
Alternate JournalPhys Rev BPhys Rev B