Anomalous orbital structure in a spinel-perovskite interface

Yanwei Cao; Xiaoran Liu; Padraic Shafer; Srimanta Middey; Derek Meyers; Mikhail Kareev; Zhicheng Zhong; Jong Woo Kim; Philip J. Ryan; Elke Arenholz; Jak Chakhalian

doi:10.1038/npjquantmats.2016.9

Anomalous orbital structure in a spinel-perovskite interface

Yanwei Cao, Xiaoran Liu, Padraic Shafer, Srimanta Middey, Derek Meyers, Mikhail Kareev, Zhicheng Zhong, Jong Woo Kim, Philip J. Ryan, Elke Arenholz, Jak Chakhalian

School of Arts and Sciences, New High Energy Theory Center

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

36 Scopus citations

Abstract

In all archetypical reported (001)-oriented perovskite heterostructures, it has been deduced that the preferential occupation of twodimensional electron gases is in-plane dxy state. In sharp contrast to this, the investigated electronic structure of a spinel-perovskite heterostructure γ-Al₂O₃/SrTiO₃ by resonant soft X-ray linear dichroism, demonstrates that the preferential occupation is in out-of-plane d_xz/d_yz states for interfacial electrons. Moreover, the impact of strain further corroborates that this anomalous orbital structure can be linked to the altered crystal field at the interface and symmetry breaking of the interfacial structural units. Our findings provide another interesting route to engineer emergent quantum states with deterministic orbital symmetry.

Original language	English (US)
Article number	16009
Journal	npj Quantum Materials
Volume	1
DOIs	https://doi.org/10.1038/npjquantmats.2016.9
State	Published - Aug 12 2016

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1038/npjquantmats.2016.9

Cite this

@article{dd86518851d942e98736fdb92d993030,

title = "Anomalous orbital structure in a spinel-perovskite interface",

abstract = "In all archetypical reported (001)-oriented perovskite heterostructures, it has been deduced that the preferential occupation of twodimensional electron gases is in-plane dxy state. In sharp contrast to this, the investigated electronic structure of a spinel-perovskite heterostructure γ-Al2O3/SrTiO3 by resonant soft X-ray linear dichroism, demonstrates that the preferential occupation is in out-of-plane dxz/dyz states for interfacial electrons. Moreover, the impact of strain further corroborates that this anomalous orbital structure can be linked to the altered crystal field at the interface and symmetry breaking of the interfacial structural units. Our findings provide another interesting route to engineer emergent quantum states with deterministic orbital symmetry.",

author = "Yanwei Cao and Xiaoran Liu and Padraic Shafer and Srimanta Middey and Derek Meyers and Mikhail Kareev and Zhicheng Zhong and Kim, {Jong Woo} and Ryan, {Philip J.} and Elke Arenholz and Jak Chakhalian",

note = "Publisher Copyright: {\textcopyright} The Author(s) 2016.",

year = "2016",

month = aug,

day = "12",

doi = "10.1038/npjquantmats.2016.9",

language = "English (US)",

volume = "1",

journal = "npj Quantum Materials",

issn = "2397-4648",

publisher = "Nature Publishing Group",

}

TY - JOUR

T1 - Anomalous orbital structure in a spinel-perovskite interface

AU - Cao, Yanwei

AU - Liu, Xiaoran

AU - Shafer, Padraic

AU - Middey, Srimanta

AU - Meyers, Derek

AU - Kareev, Mikhail

AU - Zhong, Zhicheng

AU - Kim, Jong Woo

AU - Ryan, Philip J.

AU - Arenholz, Elke

AU - Chakhalian, Jak

PY - 2016/8/12

Y1 - 2016/8/12

N2 - In all archetypical reported (001)-oriented perovskite heterostructures, it has been deduced that the preferential occupation of twodimensional electron gases is in-plane dxy state. In sharp contrast to this, the investigated electronic structure of a spinel-perovskite heterostructure γ-Al2O3/SrTiO3 by resonant soft X-ray linear dichroism, demonstrates that the preferential occupation is in out-of-plane dxz/dyz states for interfacial electrons. Moreover, the impact of strain further corroborates that this anomalous orbital structure can be linked to the altered crystal field at the interface and symmetry breaking of the interfacial structural units. Our findings provide another interesting route to engineer emergent quantum states with deterministic orbital symmetry.

AB - In all archetypical reported (001)-oriented perovskite heterostructures, it has been deduced that the preferential occupation of twodimensional electron gases is in-plane dxy state. In sharp contrast to this, the investigated electronic structure of a spinel-perovskite heterostructure γ-Al2O3/SrTiO3 by resonant soft X-ray linear dichroism, demonstrates that the preferential occupation is in out-of-plane dxz/dyz states for interfacial electrons. Moreover, the impact of strain further corroborates that this anomalous orbital structure can be linked to the altered crystal field at the interface and symmetry breaking of the interfacial structural units. Our findings provide another interesting route to engineer emergent quantum states with deterministic orbital symmetry.

UR - http://www.scopus.com/inward/record.url?scp=84987751457&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84987751457&partnerID=8YFLogxK

U2 - 10.1038/npjquantmats.2016.9

DO - 10.1038/npjquantmats.2016.9

M3 - Article

AN - SCOPUS:84987751457

SN - 2397-4648

VL - 1

JO - npj Quantum Materials

JF - npj Quantum Materials

M1 - 16009

ER -

Anomalous orbital structure in a spinel-perovskite interface

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this