Latent instabilities in metallic LaNiO 3 films by strain control of Fermi-surface topology

Hyang Keun Yoo; Seung Ill Hyun; Luca Moreschini; Hyeong Do Kim; Young Jun Chang; Chang Hee Sohn; Da Woon Jeong; Soobin Sinn; Yong Su Kim; Aaron Bostwick; Eli Rotenberg; Ji Hoon Shim; Tae Won Noh

doi:10.1038/srep08746

Latent instabilities in metallic LaNiO 3 films by strain control of Fermi-surface topology

Hyang Keun Yoo, Seung Ill Hyun, Luca Moreschini, Hyeong Do Kim, Young Jun Chang, Chang Hee Sohn, Da Woon Jeong, Soobin Sinn, Yong Su Kim, Aaron Bostwick, Eli Rotenberg, Ji Hoon Shim, Tae Won Noh

Department of Physics

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

Strain control is one of the most promising avenues to search for new emergent phenomena in transition-metal-oxide films. Here, we investigate the strain-induced changes of electronic structures in strongly correlated LaNiO 3 (LNO) films, using angle-resolved photoemission spectroscopy and the dynamical mean-field theory. The strongly renormalized e g -orbital bands are systematically rearranged by misfit strain to change its fermiology. As tensile strain increases, the hole pocket centered at the A point elongates along the k z -axis and seems to become open, thus changing Fermi-surface (FS) topology from three- to quasi-two-dimensional. Concomitantly, the FS shape becomes flattened to enhance FS nesting. A FS superstructure with Q 1 = (1/2,1/2,1/2) appears in all LNO films, while a tensile-strained LNO film has an additional Q 2 = (1/4,1/4,1/4) modulation, indicating that some instabilities are present in metallic LNO films. Charge disproportionation and spin-density-wave fluctuations observed in other nickelates might be their most probable origins.

Original language	English
Article number	8746
Journal	Scientific Reports
Volume	5
DOIs	https://doi.org/10.1038/srep08746
State	Published - 2015

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@article{b8ce790f6b934d6eb0f9cd0aa6377337,

title = "Latent instabilities in metallic LaNiO 3 films by strain control of Fermi-surface topology",

abstract = "Strain control is one of the most promising avenues to search for new emergent phenomena in transition-metal-oxide films. Here, we investigate the strain-induced changes of electronic structures in strongly correlated LaNiO 3 (LNO) films, using angle-resolved photoemission spectroscopy and the dynamical mean-field theory. The strongly renormalized e g -orbital bands are systematically rearranged by misfit strain to change its fermiology. As tensile strain increases, the hole pocket centered at the A point elongates along the k z -axis and seems to become open, thus changing Fermi-surface (FS) topology from three- to quasi-two-dimensional. Concomitantly, the FS shape becomes flattened to enhance FS nesting. A FS superstructure with Q 1 = (1/2,1/2,1/2) appears in all LNO films, while a tensile-strained LNO film has an additional Q 2 = (1/4,1/4,1/4) modulation, indicating that some instabilities are present in metallic LNO films. Charge disproportionation and spin-density-wave fluctuations observed in other nickelates might be their most probable origins.",

author = "Yoo, {Hyang Keun} and Hyun, {Seung Ill} and Luca Moreschini and Kim, {Hyeong Do} and Chang, {Young Jun} and Sohn, {Chang Hee} and Jeong, {Da Woon} and Soobin Sinn and Kim, {Yong Su} and Aaron Bostwick and Eli Rotenberg and Shim, {Ji Hoon} and Noh, {Tae Won}",

year = "2015",

doi = "10.1038/srep08746",

language = "English",

volume = "5",

journal = "Scientific Reports",

issn = "2045-2322",

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T1 - Latent instabilities in metallic LaNiO 3 films by strain control of Fermi-surface topology

AU - Yoo, Hyang Keun

AU - Hyun, Seung Ill

AU - Moreschini, Luca

AU - Kim, Hyeong Do

AU - Chang, Young Jun

AU - Sohn, Chang Hee

AU - Jeong, Da Woon

AU - Sinn, Soobin

AU - Kim, Yong Su

AU - Bostwick, Aaron

AU - Rotenberg, Eli

AU - Shim, Ji Hoon

AU - Noh, Tae Won

PY - 2015

Y1 - 2015

N2 - Strain control is one of the most promising avenues to search for new emergent phenomena in transition-metal-oxide films. Here, we investigate the strain-induced changes of electronic structures in strongly correlated LaNiO 3 (LNO) films, using angle-resolved photoemission spectroscopy and the dynamical mean-field theory. The strongly renormalized e g -orbital bands are systematically rearranged by misfit strain to change its fermiology. As tensile strain increases, the hole pocket centered at the A point elongates along the k z -axis and seems to become open, thus changing Fermi-surface (FS) topology from three- to quasi-two-dimensional. Concomitantly, the FS shape becomes flattened to enhance FS nesting. A FS superstructure with Q 1 = (1/2,1/2,1/2) appears in all LNO films, while a tensile-strained LNO film has an additional Q 2 = (1/4,1/4,1/4) modulation, indicating that some instabilities are present in metallic LNO films. Charge disproportionation and spin-density-wave fluctuations observed in other nickelates might be their most probable origins.

AB - Strain control is one of the most promising avenues to search for new emergent phenomena in transition-metal-oxide films. Here, we investigate the strain-induced changes of electronic structures in strongly correlated LaNiO 3 (LNO) films, using angle-resolved photoemission spectroscopy and the dynamical mean-field theory. The strongly renormalized e g -orbital bands are systematically rearranged by misfit strain to change its fermiology. As tensile strain increases, the hole pocket centered at the A point elongates along the k z -axis and seems to become open, thus changing Fermi-surface (FS) topology from three- to quasi-two-dimensional. Concomitantly, the FS shape becomes flattened to enhance FS nesting. A FS superstructure with Q 1 = (1/2,1/2,1/2) appears in all LNO films, while a tensile-strained LNO film has an additional Q 2 = (1/4,1/4,1/4) modulation, indicating that some instabilities are present in metallic LNO films. Charge disproportionation and spin-density-wave fluctuations observed in other nickelates might be their most probable origins.

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DO - 10.1038/srep08746

M3 - Article

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SN - 2045-2322

VL - 5

JO - Scientific Reports

JF - Scientific Reports

M1 - 8746

ER -

Latent instabilities in metallic LaNiO 3 films by strain control of Fermi-surface topology

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