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Strong Electronic Correlations in Manganese Pnictide Compounds

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dc.contributor.advisor Aronson, Meigan C en_US
dc.contributor.author McNally, Daniel Edward en_US
dc.contributor.other Department of Physics en_US
dc.date.accessioned 2017-09-20T16:50:53Z
dc.date.available 2017-09-20T16:50:53Z
dc.date.issued 2015-12-01
dc.identifier.uri http://hdl.handle.net/11401/76653 en_US
dc.description 133 pgs en_US
dc.description.abstract Electron-electron interactions must be considered to understand the electronic ground states of many crystalline solids. The work presented here addresses the effects of electronic correlation in several manganese pnictide compounds. These results contribute to our understanding of the conditions under which high temperature superconductivity and spin liquid behavior can occur. First, we find that the intra-atomic Hund's coupling between electrons is crucial for the stabilization of an insulating ground state in LaMnPO and BaMn$_2$As$_2$, which are isostructural to the parent compounds of the high temperature iron-based superconductors. Second, we find that competing inter-atomic exchange interactions frustrate the long range magnetic order in the corrugated honeycomb lattice compound CaMn$_2$Sb$_2$. Finally, we find signatures of an orbitally selective Mott phase in LaMn$_x$Sb$_2$. To arrive at these results, we performed and analyzed inelastic neutron scattering, x-ray and neutron diffraction, transport, specific heat and magnetization measurements on bulk single crystals and powders that we synthesized. We also collaborated extensively with groups that performed optical spectroscopy measurements on single crystals that we provided and electronic structure calculations on input crystal structures that we provided. en_US
dc.description.sponsorship This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree. en_US
dc.format Monograph en_US
dc.format.medium Electronic Resource en_US
dc.language.iso en_US en_US
dc.publisher The Graduate School, Stony Brook University: Stony Brook, NY. en_US
dc.subject.lcsh Condensed matter physics en_US
dc.title Strong Electronic Correlations in Manganese Pnictide Compounds en_US
dc.type Dissertation en_US
dc.mimetype Application/PDF en_US
dc.contributor.committeemember Liu, Mengkun en_US
dc.contributor.committeemember Parise, John B en_US
dc.contributor.committeemember Kotliar, Gabriel en_US
dc.contributor.committeemember Allen, Philip B en_US

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