Interfacial stabilization for epitaxial CuCrO2 delafossites

Ok, Jong Mok; Yoon, Sangmoon; Lupini, Andrew R.; Ganesh, Panchapakesan; Chisholm, Matthew F.; Lee, Ho Nyung

doi:10.1038/s41598-020-68275-w

Title: Interfacial stabilization for epitaxial CuCrO₂ delafossites

Abstract

ABO₂ delafossites are fascinating materials that exhibit a wide range of physical properties, including giant Rashba spin splitting and anomalous Hall effects, because of their characteristic layered structures composed of noble metal A and strongly correlated BO₂ sublayers. However, thin film synthesis is known to be extremely challenging owing to their low symmetry rhombohedral structures, which limit the selection of substrates for thin film epitaxy. Hexagonal lattices, such as those provided by Al₂O₃(0001) and (111) oriented cubic perovskites, are promising candidates for epitaxy of delafossites. However, the formation of twin domains and impurity phases is hard to suppress, and the nucleation and growth mechanisms thereon have not been studied for the growth of epitaxial delafossites. In this study, we report the epitaxial stabilization of a new interfacial phase formed during pulsed-laser epitaxy of (0001)-oriented CuCrO₂ epitaxial thin films on Al₂O₃ substrates. Through a combined study using scanning transmission electron microscopy/electron-energy loss spectroscopy and density functional theory calculations, we report that the nucleation of a thermodynamically stable, atomically thick CuCr_1-xAl_xO₂ interfacial layer is the critical element for the epitaxy of CuCrO₂ delafossites on Al₂O₃ substrates. This finding provides key insights into the thermodynamic mechanism for the nucleation of intermixing-induced buffer layersmore »« less

Authors:

^[1]; Yoon, Sangmoon ^[1];

^[2];

^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)

Publication Date:: Thu Jul 09 00:00:00 EDT 2020

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES), Materials Sciences and Engineering Division

OSTI Identifier:: 1649255

Grant/Contract Number:: AC05-00OR22725; AC02-05CH11231

Resource Type:: Accepted Manuscript

Journal Name:: Scientific Reports

Additional Journal Information:: Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2045-2322

Publisher:: Nature Publishing Group

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Surfaces; interfaces; thin films

Citation Formats


                    Ok, Jong Mok, Yoon, Sangmoon, Lupini, Andrew R., Ganesh, Panchapakesan, Chisholm, Matthew F., and Lee, Ho Nyung. Interfacial stabilization for epitaxial CuCrO2 delafossites.  United States: N. p., 2020. 
Web.  doi:10.1038/s41598-020-68275-w.

Copy to clipboard


                    Ok, Jong Mok, Yoon, Sangmoon, Lupini, Andrew R., Ganesh, Panchapakesan, Chisholm, Matthew F., & Lee, Ho Nyung. Interfacial stabilization for epitaxial CuCrO2 delafossites.  United States.  https://doi.org/10.1038/s41598-020-68275-w

Copy to clipboard


                    Ok, Jong Mok, Yoon, Sangmoon, Lupini, Andrew R., Ganesh, Panchapakesan, Chisholm, Matthew F., and Lee, Ho Nyung. Thu .  
"Interfacial stabilization for epitaxial CuCrO2 delafossites".  United States.  https://doi.org/10.1038/s41598-020-68275-w.  https://www.osti.gov/servlets/purl/1649255.

Copy to clipboard


                    
@article{osti_1649255,

  title        = {Interfacial stabilization for epitaxial CuCrO2 delafossites},

  author       = {Ok, Jong Mok and Yoon, Sangmoon and Lupini, Andrew R. and Ganesh, Panchapakesan and Chisholm, Matthew F. and Lee, Ho Nyung},

  abstractNote = {ABO2 delafossites are fascinating materials that exhibit a wide range of physical properties, including giant Rashba spin splitting and anomalous Hall effects, because of their characteristic layered structures composed of noble metal A and strongly correlated BO2 sublayers. However, thin film synthesis is known to be extremely challenging owing to their low symmetry rhombohedral structures, which limit the selection of substrates for thin film epitaxy. Hexagonal lattices, such as those provided by Al2O3(0001) and (111) oriented cubic perovskites, are promising candidates for epitaxy of delafossites. However, the formation of twin domains and impurity phases is hard to suppress, and the nucleation and growth mechanisms thereon have not been studied for the growth of epitaxial delafossites. In this study, we report the epitaxial stabilization of a new interfacial phase formed during pulsed-laser epitaxy of (0001)-oriented CuCrO2 epitaxial thin films on Al2O3 substrates. Through a combined study using scanning transmission electron microscopy/electron-energy loss spectroscopy and density functional theory calculations, we report that the nucleation of a thermodynamically stable, atomically thick CuCr1-xAlxO2 interfacial layer is the critical element for the epitaxy of CuCrO2 delafossites on Al2O3 substrates. This finding provides key insights into the thermodynamic mechanism for the nucleation of intermixing-induced buffer layers that can be used for the growth of other noble-metal-based delafossites, which are known to be challenging due to the difficulty in initial nucleation.},

  doi          = {10.1038/s41598-020-68275-w},

  journal      = {Scientific Reports},

  number       = 1,

  volume       = 10,

  place        = {United States},

  year         = {Thu Jul 09 00:00:00 EDT 2020},

  month        = {Thu Jul 09 00:00:00 EDT 2020}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (DOE)

Publisher's Version of Record

https://doi.org/10.1038/s41598-020-68275-w

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 8 works

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Generalized Gradient Approximation Made Simple
journal, October 1996

Perdew, John P.; Burke, Kieron; Ernzerhof, Matthias
Physical Review Letters, Vol. 77, Issue 18, p. 3865-3868
DOI: 10.1103/PhysRevLett.77.3865

Large thermopower anisotropy in $PdCo O_{2}$ thin films
journal, August 2019

Yordanov, P.; Sigle, W.; Kaya, P.
Physical Review Materials, Vol. 3, Issue 8
DOI: 10.1103/PhysRevMaterials.3.085403

Contrast Reversal in Atomic-Resolution Chemical Mapping
journal, December 2008

Wang, P.; D’Alfonso, A. J.; Findlay, S. D.
Physical Review Letters, Vol. 101, Issue 23
DOI: 10.1103/PhysRevLett.101.236102

Measurement Error in Atomic-Scale Scanning Transmission Electron Microscopy—Energy-Dispersive X-Ray Spectroscopy (STEM-EDS) Mapping of a Model Oxide Interface
journal, April 2017

Spurgeon, Steven R.; Du, Yingge; Chambers, Scott A.
Microscopy and Microanalysis, Vol. 23, Issue 3
DOI: 10.1017/S1431927617000368

Electrical, optical and structural properties of CuCrO ₂ films prepared by pulsed laser deposition
journal, August 2007

Li, Da; Fang, Xiaodong; Deng, Zanhong
Journal of Physics D: Applied Physics, Vol. 40, Issue 16
DOI: 10.1088/0022-3727/40/16/023

Thermoelectric and Transport Properties of Delafossite CuCrO2:Mg Thin Films Prepared by RF Magnetron Sputtering
journal, June 2017

Sinnarasa, Inthuga; Thimont, Yohann; Presmanes, Lionel
Nanomaterials, Vol. 7, Issue 7
DOI: 10.3390/nano7070157

Multiplet effects in X-ray spectroscopy
journal, January 2005

Groot, Frank de
Coordination Chemistry Reviews, Vol. 249, Issue 1-2
DOI: 10.1016/j.ccr.2004.03.018

Effects of the Heterointerface on the Growth Characteristics of a Brownmillerite SrFeO2.5 Thin Film Grown on SrRuO3 and SrTiO3 Perovskites
journal, March 2020

Jo, Janghyun; Nallagatlla, Venkata Raveendra; Acharya, Susant Kumar
Scientific Reports, Vol. 10, Issue 1
DOI: 10.1038/s41598-020-60772-2

High-resolution x-ray spectroscopic study of the electronic structure of the prototypical $p$ -type transparent conducting oxide $Cu Al O_{2}$
journal, November 2005

Aston, D. J.; Payne, D. J.; Green, A. J. H.
Physical Review B, Vol. 72, Issue 19
DOI: 10.1103/PhysRevB.72.195115

Pulsed-laser epitaxy of metallic delafossite PdCrO ₂ films
journal, May 2020

Ok, Jong Mok; Brahlek, Matthew; Choi, Woo Seok
APL Materials, Vol. 8, Issue 5
DOI: 10.1063/1.5144743

Magnetic, electrical and optical properties of p-type Fe-doped CuCrO2 semiconductor thin films
journal, December 2013

Lin, Fangting; Gao, Cai; Zhou, Xiaoshan
Journal of Alloys and Compounds, Vol. 581
DOI: 10.1016/j.jallcom.2013.07.160

Growth of metallic delafossite $PdCo O_{2}$ by molecular beam epitaxy
journal, September 2019

Brahlek, Matthew; Rimal, Gaurab; Ok, Jong Mok
Physical Review Materials, Vol. 3, Issue 9
DOI: 10.1103/PhysRevMaterials.3.093401

The properties of ultrapure delafossite metals
journal, January 2017

Mackenzie, A. P.
Reports on Progress in Physics, Vol. 80, Issue 3
DOI: 10.1088/1361-6633/aa50e5

Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set
journal, October 1996

Kresse, G.; Furthmüller, J.
Physical Review B, Vol. 54, Issue 16, p. 11169-11186
DOI: 10.1103/PhysRevB.54.11169

Growth of PdCoO ₂ by ozone-assisted molecular-beam epitaxy
journal, December 2019

Sun, Jiaxin; Barone, Matthew R.; Chang, Celesta S.
APL Materials, Vol. 7, Issue 12
DOI: 10.1063/1.5130627

Electronic structure of CuCrO ₂ thin films grown on Al ₂ O ₃ (001) by oxygen plasma assisted molecular beam epitaxy
journal, December 2012

Shin, D.; Foord, J. S.; Egdell, R. G.
Journal of Applied Physics, Vol. 112, Issue 11
DOI: 10.1063/1.4768726

Contribution of thermally scattered electrons to atomic resolution elemental maps
journal, July 2012

Forbes, B. D.; D'Alfonso, A. J.; Williams, R. E. A.
Physical Review B, Vol. 86, Issue 2
DOI: 10.1103/PhysRevB.86.024108

Electron-energy-loss spectra and the structural stability of nickel oxide: An LSDA+U study
journal, January 1998

Dudarev, S. L.; Botton, G. A.; Savrasov, S. Y.
Physical Review B, Vol. 57, Issue 3, p. 1505-1509
DOI: 10.1103/PhysRevB.57.1505

Quantum Oscillations and High Carrier Mobility in the Delafossite ${PdCoO}_{2}$
journal, September 2012

Hicks, Clifford W.; Gibbs, Alexandra S.; Mackenzie, Andrew P.
Physical Review Letters, Vol. 109, Issue 11
DOI: 10.1103/PhysRevLett.109.116401

Growth control of oxygen stoichiometry in homoepitaxial SrTiO3 films by pulsed laser epitaxy in high vacuum
journal, January 2016

Lee, Ho Nyung; Ambrose Seo, Sung S.; Choi, Woo Seok
Scientific Reports, Vol. 6, Issue 1
DOI: 10.1038/srep19941

Highly conductive PdCoO ₂ ultrathin films for transparent electrodes
journal, April 2018

Harada, T.; Fujiwara, K.; Tsukazaki, A.
APL Materials, Vol. 6, Issue 4
DOI: 10.1063/1.5027579

Solution-processed ternary p-type CuCrO ₂ semiconductor thin films and their application in transistors
journal, January 2018

Nie, Shengbin; Liu, Ao; Meng, You
Journal of Materials Chemistry C, Vol. 6, Issue 6
DOI: 10.1039/C7TC04810F

Atomic-scale chemical quantification of oxide interfaces using energy-dispersive X-ray spectroscopy
journal, April 2013

Lu, Ping; Xiong, Jie; Van Benthem, Mark
Applied Physics Letters, Vol. 102, Issue 17
DOI: 10.1063/1.4804184

Determination of chromium valence over the range Cr(0)–Cr(VI) by electron energy loss spectroscopy
journal, May 2006

Daulton, Tyrone L.; Little, Brenda J.
Ultramicroscopy, Vol. 106, Issue 7
DOI: 10.1016/j.ultramic.2006.02.005

Chemistry of noble metal oxides. III. Electrical transport properties and crystal chemistry of ABO2 compounds with the delafossite structure
journal, April 1971

Shannon, Robert D.; Rogers, Donald Burl; Prewitt, Charles T.
Inorganic Chemistry, Vol. 10, Issue 4
DOI: 10.1021/ic50098a013

Structural Optical and Electrical Transport Properties of ALD-Fabricated CuCrO2 Films
journal, January 2015

Tripathi, T. S.; Karppinen, Maarit
Physics Procedia, Vol. 75
DOI: 10.1016/j.phpro.2015.12.061

Chemistry of noble metal oxides. II. Crystal structures of platinum cobalt dioxide, palladium cobalt dioxide, coppper iron dioxide, and silver iron dioxide
journal, April 1971

Shannon, Robert D.; Prewitt, Charles T.; Rogers, Donald Burl
Inorganic Chemistry, Vol. 10, Issue 4
DOI: 10.1021/ic50098a012

Chemistry of noble metal oxides. I. Syntheses and properties of ABO2 delafossite compounds
journal, April 1971

Shannon, Robert D.; Rogers, Donald Burl; Prewitt, Charles T.
Inorganic Chemistry, Vol. 10, Issue 4
DOI: 10.1021/ic50098a011

Atomic Layer Engineering of Perovskite Oxides for Chemically Sharp Heterointerfaces
journal, October 2012

Choi, Woo Seok; Rouleau, Christopher M.; Seo, Sung Seok A.
Advanced Materials, Vol. 24, Issue 48
DOI: 10.1002/adma.201202691

Correcting density functional theory for accurate predictions of compound enthalpies of formation: Fitted elemental-phase reference energies
journal, March 2012

Stevanović, Vladan; Lany, Stephan; Zhang, Xiuwen
Physical Review B, Vol. 85, Issue 11
DOI: 10.1103/PhysRevB.85.115104

Oxygen 1 s x-ray-absorption edges of transition-metal oxides
journal, September 1989

de Groot, F. M. F.; Grioni, M.; Fuggle, J. C.
Physical Review B, Vol. 40, Issue 8
DOI: 10.1103/PhysRevB.40.5715

Maximal Rashba-like spin splitting via kinetic-energy-coupled inversion-symmetry breaking
journal, September 2017

Sunko, Veronika; Rosner, H.; Kushwaha, P.
Nature, Vol. 549, Issue 7673
DOI: 10.1038/nature23898

Correlation between $p$ -type conductivity and electronic structure of Cr-deficient CuCr $_{1 - x}$ O $_{2}$ ( $x$ $=$ 0--0.1)
journal, December 2012

Singh, Shashi B.; Yang, L. T.; Wang, Y. F.
Physical Review B, Vol. 86, Issue 24
DOI: 10.1103/PhysRevB.86.241103

Similar Records in DOE PAGES and OSTI.GOV collections:

Pulsed-laser epitaxy of metallic delafossite PdCrO₂ films

Journal Article Ok, Jong Mok ; Brahlek, Matthew ; Choi, Woo Seok ; ... - APL Materials

Alternate stacking of a highly conducting metallic layer with a magnetic triangular layer found in delafossite PdCrO₂ provides an excellent platform for discovering intriguing correlated quantum phenomena. Thin film growth of delafossites may enable not only the tuning of the basic physical properties beyond what bulk materials can exhibit, but also the development of novel hybrid materials by interfacing with dissimilar materials, yet this has proven to be extremely challenging. Here, we report the epitaxial growth of metallic delafossite PdCrO₂ films by pulsed laser epitaxy (PLE). The fundamental role of the PLE growth conditions, epitaxial strain, and chemical and structuralmore »« less
Cited by 19
https://doi.org/10.1063/1.5144743

Full Text Available
Revisiting the properties of delafossite CuCrO{sub 2}: A single crystal study

Journal Article Poienar, Maria ; National Institute for Research and Development in Electrochemistry and Condensed Matter, Plautius Andronescu Str Nr 1, 300224 Timisoara ; Hardy, Vincent ; ... - Journal of Solid State Chemistry

Platelet-like single-crystals of delafossite CuCrO{sub 2} have been successfully grown and characterised by X-ray diffraction and pole figures, scanning electron and atomic force microscopy. Transport measurements reveal that the resistivity is highly anisotropic, with a ratio of about 35 at 300 K between the in- and out-of-plane directions, reflecting the layered crystal structure. The magnetization and specific heat data show that CuCrO{sub 2} undergoes a unique antiferromagnetic transition at T{sub N}=24.0 K, in contrast to a recent report on CuCrO{sub 2} single-crystals showing the existence of two magnetic transitions, T{sub N1}=24.2 K and T{sub N2}=23.6 K, depending on the orientationmore »« less
https://doi.org/10.1016/j.jssc.2011.10.047
Twin-Domain Formation in Epitaxial Triangular Lattice Delafossites

Journal Article Ok, Jong Mok ; Yoon, Sangmoon ; Lupini, Andrew R. ; ... - ACS Applied Materials and Interfaces

Twin domains are often found as structural defects in symmetry mismatched epitaxial thin films. The delafossite ABO₂, which has a rhombohedral structure, is a good example that often forms twin domains. Although bulk metallic delafossites are known to be the most conducting oxides, high conductivity is yet to be realized in thin film forms. Suppressed conductivity found in thin films is mainly caused by the formation of twin domains, and their boundaries can be a source of scattering centers for charge carriers. To overcome this challenge, the underlying mechanism for their formation must be understood so that such defects canmore »« less
https://doi.org/10.1021/acsami.1c04169

Full Text Available
Room-temperature fabrication of a delafossite CuCrO₂ hole transport layer for perovskite solar cells

Journal Article Dunlap-Shohl, Wiley A. ; Daunis, Trey B. ; Wang, Xiaoming ; ... - Journal of Materials Chemistry. A

Delafossite oxides are promising hole transport layer (HTL) candidates for perovskite solar cells, due to their wide band gap, favorable energy band alignment relative to the perovskite absorber and simplicity of processing. Here, we investigate the properties of CuCrO₂ (CCO) delafossite films using an integration of experimental and computational techniques. Phase-pure CCO films are deposited at room temperature by spin-casting suspensions of hydrothermally-synthesized nanoparticles, for use in a glass/ITO/CCO/CH₃NH₃PbI₃/C₆₀/BCP/Ag device structure. Although density functional theory (DFT) calculations predict an elevated hole effective mass along certain crystallographic directions, the nearly isotropic shape and small size of the CCO nanoparticles preserves transportmore »« less
Cited by 78
https://doi.org/10.1039/C7TA09494A

Full Text Available
p-type conductivity in CuCr{sub 1{minus}x}Mg{sub x}O{sub 2} films and powders

Journal Article Nagarajan, R ; Draeseke, A D ; Sleight, A W ; ... - Journal of Applied Physics

CuCr{sub 1{minus}x}Mg{sub x}O{sub 2}, a wide band gap semiconductor with the delafossite structure, has been synthesized in bulk and thin-film form. Bulk undoped CuCrO{sub 2} is almost black and has moderate conductivity with p-type carriers. Upon doping with 5% Mg, the conductivity increases by a factor of 1000. In films, the best p-type conductivity is 220 Scm{sup {minus}1} in CuCr{sub 0.95}Mg{sub 0.05}O{sub 2}, a factor of 7 higher than previously reported for Cu-based p-type delafossites. Undoped films have a conductivity of order 1 Scm{sup {minus}1}. Films are usually polycrystalline on amorphous substrates, but undoped films can be c-axis oriented ifmore »« less
https://doi.org/10.1063/1.1372636

Similar Records

Title: Interfacial stabilization for epitaxial CuCrO2 delafossites

Abstract

Citation Formats

Generalized Gradient Approximation Made Simple journal, October 1996

Large thermopower anisotropy in PdCo O 2 thin films journal, August 2019

Contrast Reversal in Atomic-Resolution Chemical Mapping journal, December 2008

Measurement Error in Atomic-Scale Scanning Transmission Electron Microscopy—Energy-Dispersive X-Ray Spectroscopy (STEM-EDS) Mapping of a Model Oxide Interface journal, April 2017

Electrical, optical and structural properties of CuCrO 2 films prepared by pulsed laser deposition journal, August 2007

Thermoelectric and Transport Properties of Delafossite CuCrO2:Mg Thin Films Prepared by RF Magnetron Sputtering journal, June 2017

Multiplet effects in X-ray spectroscopy journal, January 2005

Effects of the Heterointerface on the Growth Characteristics of a Brownmillerite SrFeO2.5 Thin Film Grown on SrRuO3 and SrTiO3 Perovskites journal, March 2020

High-resolution x-ray spectroscopic study of the electronic structure of the prototypical p -type transparent conducting oxide Cu Al O 2 journal, November 2005

Pulsed-laser epitaxy of metallic delafossite PdCrO 2 films journal, May 2020

Magnetic, electrical and optical properties of p-type Fe-doped CuCrO2 semiconductor thin films journal, December 2013

Growth of metallic delafossite PdCo O 2 by molecular beam epitaxy journal, September 2019

The properties of ultrapure delafossite metals journal, January 2017

Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal, October 1996

Growth of PdCoO 2 by ozone-assisted molecular-beam epitaxy journal, December 2019

Electronic structure of CuCrO 2 thin films grown on Al 2 O 3 (001) by oxygen plasma assisted molecular beam epitaxy journal, December 2012

Contribution of thermally scattered electrons to atomic resolution elemental maps journal, July 2012

Electron-energy-loss spectra and the structural stability of nickel oxide: An LSDA+U study journal, January 1998

Quantum Oscillations and High Carrier Mobility in the Delafossite PdCoO 2 journal, September 2012

Growth control of oxygen stoichiometry in homoepitaxial SrTiO3 films by pulsed laser epitaxy in high vacuum journal, January 2016

Highly conductive PdCoO 2 ultrathin films for transparent electrodes journal, April 2018

Solution-processed ternary p-type CuCrO 2 semiconductor thin films and their application in transistors journal, January 2018

Atomic-scale chemical quantification of oxide interfaces using energy-dispersive X-ray spectroscopy journal, April 2013

Determination of chromium valence over the range Cr(0)–Cr(VI) by electron energy loss spectroscopy journal, May 2006

Chemistry of noble metal oxides. III. Electrical transport properties and crystal chemistry of ABO2 compounds with the delafossite structure journal, April 1971

Structural Optical and Electrical Transport Properties of ALD-Fabricated CuCrO2 Films journal, January 2015

Chemistry of noble metal oxides. II. Crystal structures of platinum cobalt dioxide, palladium cobalt dioxide, coppper iron dioxide, and silver iron dioxide journal, April 1971

Chemistry of noble metal oxides. I. Syntheses and properties of ABO2 delafossite compounds journal, April 1971

Atomic Layer Engineering of Perovskite Oxides for Chemically Sharp Heterointerfaces journal, October 2012

Correcting density functional theory for accurate predictions of compound enthalpies of formation: Fitted elemental-phase reference energies journal, March 2012

Oxygen 1 s x-ray-absorption edges of transition-metal oxides journal, September 1989

Maximal Rashba-like spin splitting via kinetic-energy-coupled inversion-symmetry breaking journal, September 2017

Correlation between p -type conductivity and electronic structure of Cr-deficient CuCr 1 − x O 2 ( x = 0--0.1) journal, December 2012

Title: Interfacial stabilization for epitaxial CuCrO₂ delafossites

Generalized Gradient Approximation Made Simple
journal, October 1996

Large thermopower anisotropy in $PdCo O_{2}$ thin films
journal, August 2019

Contrast Reversal in Atomic-Resolution Chemical Mapping
journal, December 2008

Measurement Error in Atomic-Scale Scanning Transmission Electron Microscopy—Energy-Dispersive X-Ray Spectroscopy (STEM-EDS) Mapping of a Model Oxide Interface
journal, April 2017

Electrical, optical and structural properties of CuCrO ₂ films prepared by pulsed laser deposition
journal, August 2007

Thermoelectric and Transport Properties of Delafossite CuCrO2:Mg Thin Films Prepared by RF Magnetron Sputtering
journal, June 2017

Multiplet effects in X-ray spectroscopy
journal, January 2005

Effects of the Heterointerface on the Growth Characteristics of a Brownmillerite SrFeO2.5 Thin Film Grown on SrRuO3 and SrTiO3 Perovskites
journal, March 2020

High-resolution x-ray spectroscopic study of the electronic structure of the prototypical $p$ -type transparent conducting oxide $Cu Al O_{2}$
journal, November 2005

Pulsed-laser epitaxy of metallic delafossite PdCrO ₂ films
journal, May 2020

Magnetic, electrical and optical properties of p-type Fe-doped CuCrO2 semiconductor thin films
journal, December 2013

Growth of metallic delafossite $PdCo O_{2}$ by molecular beam epitaxy
journal, September 2019

The properties of ultrapure delafossite metals
journal, January 2017

Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set
journal, October 1996

Growth of PdCoO ₂ by ozone-assisted molecular-beam epitaxy
journal, December 2019

Electronic structure of CuCrO ₂ thin films grown on Al ₂ O ₃ (001) by oxygen plasma assisted molecular beam epitaxy
journal, December 2012

Contribution of thermally scattered electrons to atomic resolution elemental maps
journal, July 2012

Electron-energy-loss spectra and the structural stability of nickel oxide: An LSDA+U study
journal, January 1998

Quantum Oscillations and High Carrier Mobility in the Delafossite ${PdCoO}_{2}$
journal, September 2012

Growth control of oxygen stoichiometry in homoepitaxial SrTiO3 films by pulsed laser epitaxy in high vacuum
journal, January 2016

Highly conductive PdCoO ₂ ultrathin films for transparent electrodes
journal, April 2018

Solution-processed ternary p-type CuCrO ₂ semiconductor thin films and their application in transistors
journal, January 2018

Atomic-scale chemical quantification of oxide interfaces using energy-dispersive X-ray spectroscopy
journal, April 2013

Determination of chromium valence over the range Cr(0)–Cr(VI) by electron energy loss spectroscopy
journal, May 2006

Chemistry of noble metal oxides. III. Electrical transport properties and crystal chemistry of ABO2 compounds with the delafossite structure
journal, April 1971

Structural Optical and Electrical Transport Properties of ALD-Fabricated CuCrO2 Films
journal, January 2015

Chemistry of noble metal oxides. II. Crystal structures of platinum cobalt dioxide, palladium cobalt dioxide, coppper iron dioxide, and silver iron dioxide
journal, April 1971

Chemistry of noble metal oxides. I. Syntheses and properties of ABO2 delafossite compounds
journal, April 1971

Atomic Layer Engineering of Perovskite Oxides for Chemically Sharp Heterointerfaces
journal, October 2012

Correcting density functional theory for accurate predictions of compound enthalpies of formation: Fitted elemental-phase reference energies
journal, March 2012

Oxygen 1 s x-ray-absorption edges of transition-metal oxides
journal, September 1989

Maximal Rashba-like spin splitting via kinetic-energy-coupled inversion-symmetry breaking
journal, September 2017

Correlation between $p$ -type conductivity and electronic structure of Cr-deficient CuCr $_{1 - x}$ O $_{2}$ ( $x$ $=$ 0--0.1)
journal, December 2012