Infrared Study of the Spin Reorientation Transition and Its Reversal in the Superconducting State in Underdoped Ba1-xKxFe2As2

Varování

Publikace nespadá pod Ústav výpočetní techniky, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.

Autoři	MALLETT B.P.P. MARŠÍK Přemysl YAZDI-RIZI M. WOLF Th. BOHMER A.E. HARDY F. MEINGAST C. MUNZAR Dominik BERNHARD Christian
Rok publikování	2015
Druh	Článek v odborném periodiku
Časopis / Zdroj	PHYSICAL REVIEW LETTERS
Fakulta / Pracoviště MU	Přírodovědecká fakulta
Citace
www	http://journals.aps.org/prl/pdf/10.1103/PhysRevLett.115.027003
Doi	https://doi.org/10.1103/PhysRevLett.115.027003
Obor	Fyzika pevných látek a magnetismus
Klíčová slova	Iron-based superconductors
Popis	With infrared spectroscopy we investigated the spin-reorientation transition from an orthorhombic antiferromagnetic (o-AF) to a tetragonal AF (t-AF) phase and the reentrance of the o-AF phase in the superconducting state of underdoped Ba1-xKxFe2As2. In agreement with the predicted transition from a single-Q to a double-Q AF structure, we found that a distinct spin density wave develops in the t-AF phase. The pair breaking peak of this spin density wave acquires much more low-energy spectral weight than the one in the o-AF state which indicates that it competes more strongly with superconductivity. We also observed additional phonon modes in the t-AF phase which likely arise from a Brillouin-zone folding that is induced by the double-Q magnetic structure with two Fe sublattices exhibiting different magnitudes of the magnetic moment.
Související projekty:	CEITEC - středoevropský technologický institut