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Title: Two dimensional electron gas in the $$\delta$$-doped iridates with strong spin–orbit coupling: La$$_\delta$$Sr2IrO4

Abstract

Iridates are of significant current interest because of the strong spin–orbit coupling that leads to a variety of new phenomena. Using density-functional studies, we suggest the formation of a spin-orbital entangled two dimensional electron gas (2DEG) in the -doped iridate La$$_\delta$$Sr2IrO4, where a single SrO layer is replaced by a LaO layer. The extra La electron resides close to the$$\delta$$-doped layer, partially occupying the Jeff = 1/2 upper Hubbard band and thereby making the interface metallic. The magnetic structure of the bulk is destroyed near the interface, with the Ir0 layer closest to the interface becoming non-magnetic, while the next layer (Ir1) continues to maintain the AFM structure of the bulk, but with a reduced magnetic moment. The Fermi surface consists of a hole pocket and an electron pocket, located in two different Ir layers (Ir0 and Ir1), with both carriers derived from the Jeff = 1/2 upper Hubbard band. The presence of both electrons and holes at the $$\delta$$-doped interface suggests unusual transport properties, leading to possible device applications.

Authors:
ORCiD logo [1]; ORCiD logo [1]
  1. Univ. of Missouri, Columbia, MO (United States)
Publication Date:
Research Org.:
Univ. of Missouri, Columbia, MO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1603372
Grant/Contract Number:  
FG02-00ER45818
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. Condensed Matter
Additional Journal Information:
Journal Volume: 31; Journal Issue: 43; Journal ID: ISSN 0953-8984
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; spin–orbit coupling; delta-doping; 2DEG; Fermi surface; Sr2IrO4; iridate

Citation Formats

Bhandari, Churna, and Satpathy, Sashi. Two dimensional electron gas in the $\delta$-doped iridates with strong spin–orbit coupling: La$_\delta$Sr2IrO4. United States: N. p., 2019. Web. https://doi.org/10.1088/1361-648X/ab2f3f.
Bhandari, Churna, & Satpathy, Sashi. Two dimensional electron gas in the $\delta$-doped iridates with strong spin–orbit coupling: La$_\delta$Sr2IrO4. United States. https://doi.org/10.1088/1361-648X/ab2f3f
Bhandari, Churna, and Satpathy, Sashi. Wed . "Two dimensional electron gas in the $\delta$-doped iridates with strong spin–orbit coupling: La$_\delta$Sr2IrO4". United States. https://doi.org/10.1088/1361-648X/ab2f3f. https://www.osti.gov/servlets/purl/1603372.
@article{osti_1603372,
title = {Two dimensional electron gas in the $\delta$-doped iridates with strong spin–orbit coupling: La$_\delta$Sr2IrO4},
author = {Bhandari, Churna and Satpathy, Sashi},
abstractNote = {Iridates are of significant current interest because of the strong spin–orbit coupling that leads to a variety of new phenomena. Using density-functional studies, we suggest the formation of a spin-orbital entangled two dimensional electron gas (2DEG) in the -doped iridate La$_\delta$Sr2IrO4, where a single SrO layer is replaced by a LaO layer. The extra La electron resides close to the$\delta$-doped layer, partially occupying the Jeff = 1/2 upper Hubbard band and thereby making the interface metallic. The magnetic structure of the bulk is destroyed near the interface, with the Ir0 layer closest to the interface becoming non-magnetic, while the next layer (Ir1) continues to maintain the AFM structure of the bulk, but with a reduced magnetic moment. The Fermi surface consists of a hole pocket and an electron pocket, located in two different Ir layers (Ir0 and Ir1), with both carriers derived from the Jeff = 1/2 upper Hubbard band. The presence of both electrons and holes at the $\delta$-doped interface suggests unusual transport properties, leading to possible device applications.},
doi = {10.1088/1361-648X/ab2f3f},
journal = {Journal of Physics. Condensed Matter},
number = 43,
volume = 31,
place = {United States},
year = {2019},
month = {10}
}

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