Engineered Mott ground state in a LaTiO3+δ/LaNiO3 heterostructure
Abstract
In pursuit of creating cuprate-like electronic and orbital structures, artificial heterostructures based on LaNiO3 have inspired a wealth of exciting experimental and theoretical results. However, to date there is a very limited experimental understanding of the electronic and orbital states emerging from interfacial charge transfer and their connections to the modified band structure at the interface. Towards this goal, we have synthesized a prototypical superlattice composed of a correlated metal LaNiO3 and a doped Mott insulator LaTiO3+δ, and investigated its electronic structure by resonant X-ray absorption spectroscopy combined with X-ray photoemission spectroscopy, electrical transport and theory calculations. The heterostructure exhibits interfacial charge transfer from Ti to Ni sites, giving rise to an insulating ground state with orbital polarization and eg orbital band splitting. Here, our findings demonstrate how the control over charge at the interface can be effectively used to create exotic electronic, orbital and spin states.
- Authors:
-
- Univ. of Arkansas, Fayetteville, AR (United States)
- Univ. of Arkansas, Fayetteville, AR (United States); Indian Institute of Technology Kharagpur, Kharagpur (India)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1241364
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 7; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; physical sciences; condensed matter
Citation Formats
Cao, Yanwei, Liu, Xiaoran, Kareev, M., Choudhury, D., Middey, S., Meyers, D., Kim, J. -W., Ryan, P. J., Freeland, J. W., and Chakhalian, J. Engineered Mott ground state in a LaTiO3+δ/LaNiO3 heterostructure. United States: N. p., 2016.
Web. doi:10.1038/ncomms10418.
Cao, Yanwei, Liu, Xiaoran, Kareev, M., Choudhury, D., Middey, S., Meyers, D., Kim, J. -W., Ryan, P. J., Freeland, J. W., & Chakhalian, J. Engineered Mott ground state in a LaTiO3+δ/LaNiO3 heterostructure. United States. https://doi.org/10.1038/ncomms10418
Cao, Yanwei, Liu, Xiaoran, Kareev, M., Choudhury, D., Middey, S., Meyers, D., Kim, J. -W., Ryan, P. J., Freeland, J. W., and Chakhalian, J. Thu .
"Engineered Mott ground state in a LaTiO3+δ/LaNiO3 heterostructure". United States. https://doi.org/10.1038/ncomms10418. https://www.osti.gov/servlets/purl/1241364.
@article{osti_1241364,
title = {Engineered Mott ground state in a LaTiO3+δ/LaNiO3 heterostructure},
author = {Cao, Yanwei and Liu, Xiaoran and Kareev, M. and Choudhury, D. and Middey, S. and Meyers, D. and Kim, J. -W. and Ryan, P. J. and Freeland, J. W. and Chakhalian, J.},
abstractNote = {In pursuit of creating cuprate-like electronic and orbital structures, artificial heterostructures based on LaNiO3 have inspired a wealth of exciting experimental and theoretical results. However, to date there is a very limited experimental understanding of the electronic and orbital states emerging from interfacial charge transfer and their connections to the modified band structure at the interface. Towards this goal, we have synthesized a prototypical superlattice composed of a correlated metal LaNiO3 and a doped Mott insulator LaTiO3+δ, and investigated its electronic structure by resonant X-ray absorption spectroscopy combined with X-ray photoemission spectroscopy, electrical transport and theory calculations. The heterostructure exhibits interfacial charge transfer from Ti to Ni sites, giving rise to an insulating ground state with orbital polarization and eg orbital band splitting. Here, our findings demonstrate how the control over charge at the interface can be effectively used to create exotic electronic, orbital and spin states.},
doi = {10.1038/ncomms10418},
journal = {Nature Communications},
number = ,
volume = 7,
place = {United States},
year = {Thu Jan 21 00:00:00 EST 2016},
month = {Thu Jan 21 00:00:00 EST 2016}
}
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