| dc.identifier.uri | http://hdl.handle.net/11401/76653 | |
| 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 | |
| dc.format.medium | Electronic Resource | en_US |
| dc.language.iso | en_US | |
| dc.publisher | The Graduate School, Stony Brook University: Stony Brook, NY. | |
| dc.type | Dissertation | |
| dcterms.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. | |
| dcterms.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. | |
| dcterms.available | 2017-09-20T16:50:53Z | |
| dcterms.contributor | Aronson, Meigan C | en_US |
| dcterms.contributor | Liu, Mengkun | en_US |
| dcterms.contributor | Parise, John B | en_US |
| dcterms.contributor | Kotliar, Gabriel | en_US |
| dcterms.contributor | Allen, Philip B. | en_US |
| dcterms.creator | McNally, Daniel Edward | |
| dcterms.dateAccepted | 2017-09-20T16:50:53Z | |
| dcterms.dateSubmitted | 2017-09-20T16:50:53Z | |
| dcterms.description | Department of Physics | en_US |
| dcterms.extent | 133 pg. | en_US |
| dcterms.format | Monograph | |
| dcterms.format | Application/PDF | en_US |
| dcterms.identifier | http://hdl.handle.net/11401/76653 | |
| dcterms.issued | 2015-12-01 | |
| dcterms.language | en_US | |
| dcterms.provenance | Made available in DSpace on 2017-09-20T16:50:53Z (GMT). No. of bitstreams: 1
McNally_grad.sunysb_0771E_12624.pdf: 21406329 bytes, checksum: 992b4ffb246824ff0e09779bf0d6b7ef (MD5)
Previous issue date: 1 | en |
| dcterms.publisher | The Graduate School, Stony Brook University: Stony Brook, NY. | |
| dcterms.subject | Condensed matter physics | |
| dcterms.title | Strong Electronic Correlations in Manganese Pnictide Compounds | |
| dcterms.type | Dissertation | |
