TY - JOUR
T1 - Procedure for LEED I-V structural analysis of metal oxide surfaces
T2 - Ca1.5 Sr0.5 RuO4 (001)
AU - Nascimento, V. B.
AU - Moore, R. G.
AU - Rundgren, J.
AU - Zhang, Jiandi
AU - Cai, Lei
AU - Jin, R.
AU - Mandrus, D. G.
AU - Plummer, E. W.
PY - 2007
Y1 - 2007
N2 - Transition metal oxides (TMOs) are famous for the intimate coupling between the lattice, electrons, and spin, creating exotic functionality. Creating a surface, breaking the symmetry, should result in lattice distortions that due to the close coupling could create different "surface phases." Historically it has been very difficult to use low energy electron diffraction I-V to quantitatively determine the surface structure of TMOs. A signature of this problem is the large values commonly reported in the literature of the Pendry reliability factor (RP), which is used to quantify the agreement between experimental data and calculated diffraction. In this paper we describe a consistent procedure for determining the phase shifts using an optimized muffin-tin potential approach combined with an energy-dependent real and imaginary inner potential. This procedure is used to determine the surface structure of the layered TMO Ca1.5 Sr0.5 RuO4. An acceptable Pendry reliability factor is achieved (RP =0.28).
AB - Transition metal oxides (TMOs) are famous for the intimate coupling between the lattice, electrons, and spin, creating exotic functionality. Creating a surface, breaking the symmetry, should result in lattice distortions that due to the close coupling could create different "surface phases." Historically it has been very difficult to use low energy electron diffraction I-V to quantitatively determine the surface structure of TMOs. A signature of this problem is the large values commonly reported in the literature of the Pendry reliability factor (RP), which is used to quantify the agreement between experimental data and calculated diffraction. In this paper we describe a consistent procedure for determining the phase shifts using an optimized muffin-tin potential approach combined with an energy-dependent real and imaginary inner potential. This procedure is used to determine the surface structure of the layered TMO Ca1.5 Sr0.5 RuO4. An acceptable Pendry reliability factor is achieved (RP =0.28).
UR - http://www.scopus.com/inward/record.url?scp=33846347687&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.75.035408
DO - 10.1103/PhysRevB.75.035408
M3 - Article
AN - SCOPUS:33846347687
SN - 1098-0121
VL - 75
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 3
M1 - 035408
ER -