Electronic correlation and magnetism in multi-band Kondo lattice models [Elektronische Ressource] : application to real materials / von Anand Sharma

Electronic correlation and magnetism in multi-band Kondo lattice modelApplication to real materialsDISSERTATIONzur Erlangung des akademischen Gradesdoctor rerum naturalium(Dr. rer. nat.)im Fach Physikeingereicht an derMathematisch-NaturwissenschaftlichenFakultät IHumboldt-Universität zu BerlinvonHerr MSc. Anand Sharmageboren am 26.06.1979 in Bombay (Mumbai)Präsident der Humboldt-Universität zu Berlin:Prof. Dr. Christoph MarkschiesDekan der Mathematisch-NaturwissenschaftlichenFakultät I:Prof. Dr. Christian LimbergGutachter:1. Prof. Dr. Wolfgang Nolting2. Prof. Dr. Wladyslaw Borgiel3. Prof. Dr. Recardo Manzkeeingereicht am: 12. Oktober 2007Tag der mündlichen Prüfung: 20. Dezember 2007AbstractThis dissertation deals with a combination of many- body evaluation of a spinexchange interaction between the itinerant electrons and localized 4f momentson a periodic lattice, i.e. within the so- called multi- band Kondo lattice model(KLM), and the T=0 first principles calculations in order to study the elec-tronic correlation effects in real materials like Europium Sulphide (EuS) andGadolinium Nitride (GdN). The single- particle ground state energy or hop-ping integral acting as an input in the many- body part is obtained using tightbinding linear muffin- tin orbital within atomic sphere approximation (TB-LMTO- ASA) program and is a matrix in general.