Speaker
Dr
Mihaela FALUB
(Paul Scherrer Institut, Swiss Light Source)
Description
Hole-doped manganese perovskites La1-xSrxMnO3 (LSMO) have stimulated a renewed scientific and technological interest because of their complex electronic and magnetic properties. Angle-resolved photoemission (ARPES), which directly probes the k-dependent electronic structure, could not be used to study LSMO single crystals because of their isotropic cubic symmetry (no preferential cleaving plane). The only alternative approach is to grow high-quality thin films and measure them in-situ ARPES.
Our pioneering work [1] provided essential information about the low-energy electronic structure of LSMO, such as broad dispersive peaks and the clear observation of k-dependent spectral weight at the Fermi level.
Here we report the complete topology of the Fermi Surface (FS) for LSMO thin films grown on SrTiO3 substrates and discuss our data in relation to the existing theoretical calculations and ARPES results of the similar layered manganites. The FS consists of an electron pocket centered at G point, formed by the (out-of-plane) 3z2-r2 electronic states, and hole cuboids centered at M points, mainly of (in-plane) x2-y2 character.
[1] M. Shi et al., Phys. Rev. B 70 (2004) 140407
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Multiple Order Parameter Systems
Primary author
Dr
Mihaela FALUB
(Paul Scherrer Institut, Swiss Light Source)
Co-authors
Mr
Elia Razzoli
(Paul Scherrer Institut, Swiss Light Source)
Dr
Juraj Krempasky
(Paul Scherrer Institut, Swiss Light Source)
Prof.
Karol Hricovini
(University Cergy-Pontoise, France)
Dr
Luc Patthey
(Paul Scherrer Institut, Swiss Light Source)
Dr
Milan Radovic
(Paul Scherrer Institut, Swiss Light Source)
Dr
Ming Shi
(Paul Scherrer Institut, Swiss Light Source)
Dr
Nicholas Plumb
(Paul Scherrer Institut, Swiss Light Source)
