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Title: Controlling a Van Hove singularity and Fermi surface topology at a complex oxide heterostructure interface

Abstract

Abstract The emergence of saddle-point Van Hove singularities (VHSs) in the density of states, accompanied by a change in Fermi surface topology, Lifshitz transition, constitutes an ideal ground for the emergence of different electronic phenomena, such as superconductivity, pseudo-gap, magnetism, and density waves. However, in most materials the Fermi level, $$$${E}_{{\rm{F}}}$$$$ E F , is too far from the VHS where the change of electronic topology takes place, making it difficult to reach with standard chemical doping or gating techniques. Here, we demonstrate that this scenario can be realized at the interface between a Mott insulator and a band insulator as a result of quantum confinement and correlation enhancement, and easily tuned by fine control of layer thickness and orbital occupancy. These results provide a tunable pathway for Fermi surface topology and VHS engineering of electronic phases.

Authors:
ORCiD logo; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; Gordon and Betty Moore Foundation (GBMF); National Science Foundation (NSF); Funai Foundation for Information Technology
OSTI Identifier:
1619601
Alternate Identifier(s):
OSTI ID: 1581087
Grant/Contract Number:  
AC02-05-CH11231; AC02-05CH11231; GBMF4859; 1740213
Resource Type:
Published Article
Journal Name:
Nature Communications
Additional Journal Information:
Journal Name: Nature Communications Journal Volume: 10 Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United Kingdom
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Mori, Ryo, Marshall, Patrick B., Ahadi, Kaveh, Denlinger, Jonathan D., Stemmer, Susanne, and Lanzara, Alessandra. Controlling a Van Hove singularity and Fermi surface topology at a complex oxide heterostructure interface. United Kingdom: N. p., 2019. Web. doi:10.1038/s41467-019-13046-z.
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Mori, Ryo, Marshall, Patrick B., Ahadi, Kaveh, Denlinger, Jonathan D., Stemmer, Susanne, & Lanzara, Alessandra. Controlling a Van Hove singularity and Fermi surface topology at a complex oxide heterostructure interface. United Kingdom. https://doi.org/10.1038/s41467-019-13046-z
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Mori, Ryo, Marshall, Patrick B., Ahadi, Kaveh, Denlinger, Jonathan D., Stemmer, Susanne, and Lanzara, Alessandra. Wed . "Controlling a Van Hove singularity and Fermi surface topology at a complex oxide heterostructure interface". United Kingdom. https://doi.org/10.1038/s41467-019-13046-z.
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@article{osti_1619601,
title = {Controlling a Van Hove singularity and Fermi surface topology at a complex oxide heterostructure interface},
author = {Mori, Ryo and Marshall, Patrick B. and Ahadi, Kaveh and Denlinger, Jonathan D. and Stemmer, Susanne and Lanzara, Alessandra},
abstractNote = {Abstract The emergence of saddle-point Van Hove singularities (VHSs) in the density of states, accompanied by a change in Fermi surface topology, Lifshitz transition, constitutes an ideal ground for the emergence of different electronic phenomena, such as superconductivity, pseudo-gap, magnetism, and density waves. However, in most materials the Fermi level, $${E}_{{\rm{F}}}$$ E F , is too far from the VHS where the change of electronic topology takes place, making it difficult to reach with standard chemical doping or gating techniques. Here, we demonstrate that this scenario can be realized at the interface between a Mott insulator and a band insulator as a result of quantum confinement and correlation enhancement, and easily tuned by fine control of layer thickness and orbital occupancy. These results provide a tunable pathway for Fermi surface topology and VHS engineering of electronic phases.},
doi = {10.1038/s41467-019-13046-z},
journal = {Nature Communications},
number = 1,
volume = 10,
place = {United Kingdom},
year = {Wed Dec 04 00:00:00 EST 2019},
month = {Wed Dec 04 00:00:00 EST 2019}
}
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https://doi.org/10.1038/s41467-019-13046-z
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