mixed electronic/ionic conductors; strongly correlated fermion systems; metal-insulator transitions; high-temperature electrochemistry; metal insulator transitions; x-ray spectroscopy; perovskites
Braun Artur, Erat Selma, Bayraktar Defne, Harvey Ashley, Graule Thomas (2012), Electronic Origin of Conductivity Changes and Isothermal Expansion of Ta- and Ti-Substituted La1/2Sr1/2Fe-Oxide in Oxidative and Reducing Atmosphere, in Chem. Mater.
, 24(8), 1529-1535.
Haas O, Ludwig C, Bergmann U, Singh RN, Braun A, Graule T (2011), X-ray absorption investigation of the valence state and electronic structure of La1-xCaxCoO3-delta in comparison with La1-xSrxCoO3-delta and La1-xSrxFeO3-delta, in JOURNAL OF SOLID STATE CHEMISTRY
, 184(12), 3163-3171.
Braun A, Erat S, Ariffin AK, Manzke R, Wadati H, Graule T, Gauckler LJ (2011), High temperature oxygen near edge x-ray absorption fine structure valence band spectra and conductivity of LaFe3/4Ni1/4O3 from 300 to 773K, in APPLIED PHYSICS LETTERS
, 99(20), 2112-1-2112-3.
Bora DK, Braun A, Erat S, Ariffin AK, Lohnert R, Sivula K, Topfer J, Gratzel M, Manzke R, Graule T, Constable EC (2011), Evolution of an Oxygen Near-Edge X-ray Absorption Fine Structure Transition in the Upper Hubbard Band in alpha-Fe2O3 upon Electrochemical Oxidation, in JOURNAL OF PHYSICAL CHEMISTRY C
, 115(13), 5619-5625.
Erat S, Braun A, Piamonteze C, Liu Z, Ovalle A, Schindler H, Graule T, Gauckler LJ (2010), Entanglement of charge transfer, hole doping, exchange interaction, and octahedron tilting angle and their influence on the conductivity of La1-xSrxFe0.75Ni0.25O3-delta: A combination of x-ray spectroscopy and diffraction, in JOURNAL OF APPLIED PHYSICS
, 108(12), 4906-1-4906-3.
Erat S, Wadati H, Aksoy F, Liu Z, Graule T, Gauckler LJ, Braun A (2010), Iron-resonant valence band photoemission and oxygen near edge x-ray absorption fine structure study on La1-xSrxFe0.75Ni0.25O3-delta, in APPLIED PHYSICS LETTERS
, 97(12), 4101-1-4101-3.
Braun A, Mun BS, Sun Y, Liu Z, Groning O, Mader R, Erat S, Zhang X, Mao SS, Pomjakushina E, Conder K, Graule T (2010), Correlation of conductivity and angle integrated valence band photoemission characteristics in single crystal iron perovskites for 300 K < T < 800 K: Comparison of surface and bulk sensitive methods, in JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
, 181(1), 56-62.
Erat S, Braun A, Ovalle A, Piamonteze C, Liu Z, Graule T, Gauckler LJ (2009), Correlation of O (1s) and Fe (2p) near edge x-ray absorption fine structure spectra and electrical conductivity of La1-xSrxFe0.75Ni0.25O3-delta, in APPLIED PHYSICS LETTERS
, 95(17), 4108-1-4108-3.
Braun A, Zhang X, Sun Y, Muller U, Liu Z, Erat S, Ari M, Grimmer H, Mao SS, Graule T (2009), Correlation of high temperature x-ray photoemission valence band spectra and conductivity in strained LaSrFeNi oxide on SrTiO3(110), in APPLIED PHYSICS LETTERS
, 95(2), 1-3.
Braun A, Bayraktar D, Erat S, Harvey AS, Beckel D, Purton JA, Holtappels P, Gauckler LJ, Graule T (2009), Pre-edges in oxygen (1s) x-ray absorption spectra: A spectral indicator for electron hole depletion and transport blocking in iron perovskites, in APPLIED PHYSICS LETTERS
, 94(20), 2102-1-2102-3.
Braun A, Richter J, Harvey AS, Erat S, Infortuna A, Frei A, Pomjakushina E, Mun BS, Holtappels P, Vogt U, Conder K, Gauckler LJ, Graule T (2008), Electron hole-phonon interaction, correlation of structure, and conductivity in single crystal La0.9Sr0.1FeO3-delta, in APPLIED PHYSICS LETTERS
, 93(26), 2103-1-2103-3.