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Theoretical Studies of Unconventional Superconductivity in Materials with Strong Electronic Correlations

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Theoretical Studies of Unconventional Superconductivity in Materials with Strong Electronic Correlations/
作者:	Karp, Jonathan.
面頁冊數:	1 online resource (220 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-01, Section: B.
Contained By:	Dissertations Abstracts International84-01B.
標題:	Applied physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29259945click for full text (PQDT)
ISBN:	9798837525766

Theoretical Studies of Unconventional Superconductivity in Materials with Strong Electronic Correlations
Karp, Jonathan.

Theoretical Studies of Unconventional Superconductivity in Materials with Strong Electronic Correlations - 1 online resource (220 pages)

Source: Dissertations Abstracts International, Volume: 84-01, Section: B.

Thesis (Ph.D.)--Columbia University, 2022.

Includes bibliographical references

We use a combination of Density Functional Theory and Dynamical Mean Field Theory (DFT+DMFT) to study electronic correlations in unconventional superconductors, with a focus on nickelate analogs of cuprate superconductors. We study the infinite layer nickelate superconductor NdNiO2 in parallel with the isostructural CaCuO2. Our results point to superconductivity in the nickelate being cupratelike, with correlations dominated by a hybrid Ni-dx2−y2 and O-p band, and with the extra bands not contributing substantially to the superconducting state. We find that the infinite layer nickelate NdNiO2 and the trilayer nickelate Pr4Ni3O8 are virtually identical in terms of correlation physics when compared at the same chemical doping, despite the differences in Fermiology, indicating that the number of layers can stand in for chemical doping for some properties related to electronic correlations. We find that as opposed to in narrow window DFT+DMFT, in wide window DFT+DMFT the choice of downfolding procedure leads to very different results. This is an important ambiguity in the method that must be resolved or the method is incomplete by itself. We also study Sr2MoO4 in parallel with the Hund's superconductor Sr2RuO4, and find that Sr2MoO4 is a particle-hole dual of Sr2RuO4 but without the van Hove singularity at the Fermi level, which disentangles the influence of the van Hove singularity from Hund's physics. We show that Sr2MoO4 has a characteristic Hund's peak on the occupied of the spectral function, indicating that the peak should be observable by photoemission experiments.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798837525766Subjects--Topical Terms:

3343996
Applied physics.
Subjects--Index Terms:

Density Functional TheoryIndex Terms--Genre/Form:

542853
Electronic books.

Theoretical Studies of Unconventional Superconductivity in Materials with Strong Electronic Correlations
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504 $a Includes bibliographical references
520 $a We use a combination of Density Functional Theory and Dynamical Mean Field Theory (DFT+DMFT) to study electronic correlations in unconventional superconductors, with a focus on nickelate analogs of cuprate superconductors. We study the infinite layer nickelate superconductor NdNiO2 in parallel with the isostructural CaCuO2. Our results point to superconductivity in the nickelate being cupratelike, with correlations dominated by a hybrid Ni-dx2−y2 and O-p band, and with the extra bands not contributing substantially to the superconducting state. We find that the infinite layer nickelate NdNiO2 and the trilayer nickelate Pr4Ni3O8 are virtually identical in terms of correlation physics when compared at the same chemical doping, despite the differences in Fermiology, indicating that the number of layers can stand in for chemical doping for some properties related to electronic correlations. We find that as opposed to in narrow window DFT+DMFT, in wide window DFT+DMFT the choice of downfolding procedure leads to very different results. This is an important ambiguity in the method that must be resolved or the method is incomplete by itself. We also study Sr2MoO4 in parallel with the Hund's superconductor Sr2RuO4, and find that Sr2MoO4 is a particle-hole dual of Sr2RuO4 but without the van Hove singularity at the Fermi level, which disentangles the influence of the van Hove singularity from Hund's physics. We show that Sr2MoO4 has a characteristic Hund's peak on the occupied of the spectral function, indicating that the peak should be observable by photoemission experiments.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
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650 4 $a Electromagnetics. $3 3173223
650 4 $a Materials science. $3 543314
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653 $a Dynamical Mean Field Theory
653 $a Nickelate
653 $a Superconductivity
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710 2 $a Columbia University. $b Applied Physics. $3 3187824
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