Spin and orbital degrees of freedom in transition metal oxides and oxide thin films studied by soft X-ray absorption spectroscopy

Introduction......Page 5
Interpretation of x-ray absorption spectroscopy......Page 6
The importance of full multiplet theory......Page 9
Scope......Page 17
X-ray absorption spectroscopy......Page 21
One-electron theory......Page 23
Excitons......Page 25
Multiplets and selection rules......Page 30
Polarization dependence......Page 37
Cluster calculations......Page 47
Many-electron wave-functions......Page 48
One-electron Hamilton Operators......Page 49
Crystal Field......Page 50
Covalency......Page 55
Spectroscopy......Page 56
Sum-rules......Page 59
Summery......Page 68
Magnetic versus crystal field linear dichroism in NiO thin films  Phys. Rev. B 69, 020408 (2004)......Page 71
CoO......Page 79
Crystal and magnetic structure of cobalt oxide.......Page 81
Experimental setup......Page 82
Isotropic line-shape and temperature dependence.......Page 85
Circular dichroism; magnetic spin momentum, magnetic orbital momentum, and exchange coupling.......Page 89
Linear dichroism; orbital occupation and spin direction.......Page 91
Spin direction in thin films of CoO under tensile or compressive strain......Page 104
Electronic structure of CoO......Page 106
Conclusion......Page 111
Aligning spins in antiferromagnetic films using antiferromagnets......Page 113
The spin-state puzzle in the cobaltates......Page 121
Stabilization of the intermediate-spin state within cluster calculations......Page 125
Stabilizing the intermediate-spin state by band formation......Page 127
Stabilizing the intermediate-spin state by Jahn-Teller distortions......Page 130
Different look at the spin-state of Co3+ ions in a CoO5 pyramidal coordination. Phys. Rev. Lett. 92, 207402 (2004)......Page 132
Determination of the orbital moment and crystal field splitting in LaTiO3 Phys. Rev. Lett. 94, 056401 (2005)......Page 141
Orbital-assisted metal-insulator transition in VO2......Page 149
Slater integrals for 3d and 4d elements......Page 157
Source-code of Ak,m......Page 165
Manual for XTLS......Page 183
Abstract......Page 191
Zusammenfassung......Page 195
Acknowledgements......Page 213
Erklärung......Page 217
Publications......Page 219
Curiculum vitae......Page 221