LaTiO₃/KTaO₃ interfaces: A new two-dimensional electron gas system
Abstract
We report a new 2D electron gas (2DEG) system at the interface between a Mott insulator, LaTiO₃, and a band insulator, KTaO₃. For LaTiO₃/KTaO₃ interfaces, we observe metallic conduction from 2 K to 300 K. One serious technological limitation of SrTiO₃-based conducting oxide interfaces for electronics applications is the relatively low carrier mobility (0.5-10 cm²/V s) of SrTiO₃ at room temperature. By using KTaO₃, we achieve mobilities in LaTiO₃/KTaO₃ interfaces as high as 21 cm²/V s at room temperature, over a factor of 3 higher than observed in doped bulk SrTiO₃. By density functional theory, we attribute the higher mobility in KTaO₃ 2DEGs to the smaller effective mass for electrons in KTaO₃.
- Authors:
-
- Yale Univ., New Haven, CT (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States); Nanjing Univ. (China)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1191184
- Grant/Contract Number:
- AC02-98CH10886
- Resource Type:
- Accepted Manuscript
- Journal Name:
- APL Materials
- Additional Journal Information:
- Journal Volume: 3; Journal Issue: 3; Journal ID: ISSN 2166-532X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Zou, K., Ismail-Beigi, Sohrab, Kisslinger, Kim, Shen, Xuan, Su, Dong, Walker, F. J., and Ahn, C. H. LaTiO₃/KTaO₃ interfaces: A new two-dimensional electron gas system. United States: N. p., 2015.
Web. doi:10.1063/1.4914310.
Zou, K., Ismail-Beigi, Sohrab, Kisslinger, Kim, Shen, Xuan, Su, Dong, Walker, F. J., & Ahn, C. H. LaTiO₃/KTaO₃ interfaces: A new two-dimensional electron gas system. United States. https://doi.org/10.1063/1.4914310
Zou, K., Ismail-Beigi, Sohrab, Kisslinger, Kim, Shen, Xuan, Su, Dong, Walker, F. J., and Ahn, C. H. Sun .
"LaTiO₃/KTaO₃ interfaces: A new two-dimensional electron gas system". United States. https://doi.org/10.1063/1.4914310. https://www.osti.gov/servlets/purl/1191184.
@article{osti_1191184,
title = {LaTiO₃/KTaO₃ interfaces: A new two-dimensional electron gas system},
author = {Zou, K. and Ismail-Beigi, Sohrab and Kisslinger, Kim and Shen, Xuan and Su, Dong and Walker, F. J. and Ahn, C. H.},
abstractNote = {We report a new 2D electron gas (2DEG) system at the interface between a Mott insulator, LaTiO₃, and a band insulator, KTaO₃. For LaTiO₃/KTaO₃ interfaces, we observe metallic conduction from 2 K to 300 K. One serious technological limitation of SrTiO₃-based conducting oxide interfaces for electronics applications is the relatively low carrier mobility (0.5-10 cm²/V s) of SrTiO₃ at room temperature. By using KTaO₃, we achieve mobilities in LaTiO₃/KTaO₃ interfaces as high as 21 cm²/V s at room temperature, over a factor of 3 higher than observed in doped bulk SrTiO₃. By density functional theory, we attribute the higher mobility in KTaO₃ 2DEGs to the smaller effective mass for electrons in KTaO₃.},
doi = {10.1063/1.4914310},
journal = {APL Materials},
number = 3,
volume = 3,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 2015},
month = {Sun Mar 01 00:00:00 EST 2015}
}
Free Publicly Available Full Text
Publisher's Version of Record
Other availability
Search WorldCat to find libraries that may hold this journal
Cited by: 78 works
Citation information provided by
Web of Science
Web of Science
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Electron Mobility in Semiconducting Strontium Titanate
journal, March 1967
- Tufte, O. N.; Chapman, P. W.
- Physical Review, Vol. 155, Issue 3
Density and spatial distribution of charge carriers in the intrinsic -type interface
journal, June 2009
- Son, Won-joon; Cho, Eunae; Lee, Bora
- Physical Review B, Vol. 79, Issue 24
Charge localization or itineracy at interfaces Hole polarons, oxygen vacancies, and mobile electrons
journal, July 2006
- Pentcheva, R.; Pickett, W. E.
- Physical Review B, Vol. 74, Issue 3, Article No. 035112
Electric field control of the LaAlO3/SrTiO3 interface ground state
journal, December 2008
- Caviglia, A. D.; Gariglio, S.; Reyren, N.
- Nature, Vol. 456, Issue 7222
Avoiding the Polarization Catastrophe in Overlayers on through Polar Distortion
journal, March 2009
- Pentcheva, Rossitza; Pickett, Warren E.
- Physical Review Letters, Vol. 102, Issue 10
Enhanced carrier mobilities in two-dimensional electron gases at III-III/I-V oxide heterostructure interfaces
journal, June 2012
- Cooper, Valentino R.
- Physical Review B, Vol. 85, Issue 23
First-principles calculations of the electronic structure and spectra of strongly correlated systems: the LDA + U method
journal, January 1997
- Anisimov, Vladimir I.; Aryasetiawan, F.; Lichtenstein, A. I.
- Journal of Physics: Condensed Matter, Vol. 9, Issue 4, p. 767-808
First-principles study of electronic reconstructions of heterointerfaces and their variants
journal, August 2010
- Chen, Hanghui; Kolpak, Alexie; Ismail-Beigi, Sohrab
- Physical Review B, Vol. 82, Issue 8
Alleviating polarity-conflict at the heterointerfaces of KTaO 3 /GdScO 3 polar complex-oxides
journal, September 2014
- Thompson, J.; Hwang, J.; Nichols, J.
- Applied Physics Letters, Vol. 105, Issue 10
Effect of oxygen vacancies in the substrate on the electrical properties of the interface
journal, March 2007
- Kalabukhov, Alexey; Gunnarsson, Robert; Börjesson, Johan
- Physical Review B, Vol. 75, Issue 12
Transport properties of LaTiO3/SrTiO3 heterostructures
journal, May 2010
- Ohtsuka, R.; Matvejeff, M.; Nishio, K.
- Applied Physics Letters, Vol. 96, Issue 19
The growth and properties of epitaxial KNbO 3 thin films and KNbO 3 /KTaO 3 superlattices
journal, March 1996
- Christen, H. ‐M.; Boatner, L. A.; Budai, J. D.
- Applied Physics Letters, Vol. 68, Issue 11
Why Some Interfaces Cannot be Sharp
text, January 2005
- Nakagawa, Naoyuki; Hwang, Harold Y.; Muller, David A.
- arXiv
Self-Consistent Equations Including Exchange and Correlation Effects
journal, November 1965
- Kohn, W.; Sham, L. J.
- Physical Review, Vol. 140, Issue 4A, p. A1133-A1138
Two-dimensional superconductivity at a Mott insulator/band insulator interface LaTiO3/SrTiO3
journal, October 2010
- Biscaras, J.; Bergeal, N.; Kushwaha, A.
- Nature Communications, Vol. 1, Issue 1
Magnetic effects at the interface between non-magnetic oxides
journal, June 2007
- Brinkman, A.; Huijben, M.; van Zalk, M.
- Nature Materials, Vol. 6, Issue 7, p. 493-496
Mapping the spatial distribution of charge carriers in LaAlO3/SrTiO3 heterostructures
journal, June 2008
- Basletic, M.; Maurice, J. -L.; Carrétéro, C.
- Nature Materials, Vol. 7, Issue 8
High Mobility in Heterostructures: Origin, Dimensionality, and Perspectives
journal, May 2007
- Herranz, G.; Basletić, M.; Bibes, M.
- Physical Review Letters, Vol. 98, Issue 21, Article No. 216803
Direct imaging of the coexistence of ferromagnetism and superconductivity at the LaAlO3/SrTiO3 interface
text, January 2011
- Bert, J. A.; Kalisky, B.; Bell, C.
- arXiv
Discovery of superconductivity in KTaO3 by electrostatic carrier doping
journal, May 2011
- Ueno, K.; Nakamura, S.; Shimotani, H.
- Nature Nanotechnology, Vol. 6, Issue 7
Inhomogeneous Electron Gas
journal, November 1964
- Hohenberg, P.; Kohn, W.
- Physical Review, Vol. 136, Issue 3B, p. B864-B871
Transport in ferromagnetic GdTiO3/SrTiO3 heterostructures
journal, March 2011
- Moetakef, Pouya; Zhang, Jack Y.; Kozhanov, Alexander
- Applied Physics Letters, Vol. 98, Issue 11
Temperature Dependence of the Transverse and Longitudinal Optic Mode Frequencies and Charges in SrTi and BaTi
journal, May 1966
- Barker, A. S.
- Physical Review, Vol. 145, Issue 2
Nanoscale control of an interfacial metal–insulator transition at room temperature
journal, March 2008
- Cen, C.; Thiel, S.; Hammerl, G.
- Nature Materials, Vol. 7, Issue 4
A high-mobility electron gas at the LaAlO3/SrTiO3 heterointerface
journal, January 2004
- Ohtomo, A.; Hwang, H. Y.
- Nature, Vol. 427, Issue 6973
Origin of Charge Density at on Heterointerfaces: Possibility of Intrinsic Doping
journal, May 2007
- Siemons, Wolter; Koster, Gertjan; Yamamoto, Hideki
- Physical Review Letters, Vol. 98, Issue 19, Article No. 196802
Why some interfaces cannot be sharp
journal, January 2006
- Nakagawa, Naoyuki; Hwang, Harold Y.; Muller, David A.
- Nature Materials, Vol. 5, Issue 3, p. 204-209
Charge origin and localization at the -type interface
journal, November 2008
- Lee, Jaekwang; Demkov, Alexander A.
- Physical Review B, Vol. 78, Issue 19
Superconducting Interfaces Between Insulating Oxides
journal, August 2007
- Reyren, N.; Thiel, S.; Caviglia, A. D.
- Science, Vol. 317, Issue 5842
Iterative minimization techniques for ab initio total-energy calculations: molecular dynamics and conjugate gradients
journal, October 1992
- Payne, M. C.; Teter, M. P.; Allan, D. C.
- Reviews of Modern Physics, Vol. 64, Issue 4
Electronic and Magnetic Properties of SrTiO3/LaAlO3 Interfaces from First Principles
journal, April 2010
- Chen, Hanghui; Kolpak, Alexie M.; Ismail-Beigi, Sohrab
- Advanced Materials, Vol. 22, Issue 26-27
Origin of metallicity of heterostructures
journal, March 2008
- Ishida, H.; Liebsch, A.
- Physical Review B, Vol. 77, Issue 11
Self-interaction correction to density-functional approximations for many-electron systems
journal, May 1981
- Perdew, J. P.; Zunger, Alex
- Physical Review B, Vol. 23, Issue 10, p. 5048-5079
Carrier-Controlled Ferromagnetism in
journal, June 2012
- Moetakef, Pouya; Williams, James R.; Ouellette, Daniel G.
- Physical Review X, Vol. 2, Issue 2
Electrostatic carrier doping of GdTiO3/SrTiO3 interfaces
text, January 2011
- Moetakef, Pouya; Cain, Tyler A.; Ouellette, Daniel G.
- arXiv
Electrostatic carrier doping of GdTiO 3 /SrTiO 3 interfaces
journal, December 2011
- Moetakef, Pouya; Cain, Tyler A.; Ouellette, Daniel G.
- Applied Physics Letters, Vol. 99, Issue 23
Fundamental asymmetry in interfacial electronic reconstruction between insulating oxides: An ab initio study
journal, April 2009
- Chen, Hanghui; Kolpak, Alexie M.; Ismail-Beigi, Sohrab
- Physical Review B, Vol. 79, Issue 16
Nonlinear Hall effect and multichannel conduction in superlattices
journal, November 2010
- Kim, J. S.; Seo, S. S. A.; Chisholm, M. F.
- Physical Review B, Vol. 82, Issue 20
Metallicity in thin films induced by lattice deformation
journal, April 2010
- Wong, Franklin J.; Baek, Seung-Hyub; Chopdekar, Rajesh V.
- Physical Review B, Vol. 81, Issue 16
Direct imaging of the coexistence of ferromagnetism and superconductivity at the LaAlO3/SrTiO3 interface
journal, September 2011
- Bert, Julie A.; Kalisky, Beena; Bell, Christopher
- Nature Physics, Vol. 7, Issue 10, p. 767-771
Controlling the density of the two-dimensional electron gas at the SrTiO /LaAlO interface
journal, December 2012
- Janotti, A.; Bjaalie, L.; Gordon, L.
- Physical Review B, Vol. 86, Issue 24
A high density two-dimensional electron gas in an oxide heterostructure on Si (001)
journal, November 2014
- Jin, E. N.; Kornblum, L.; Kumah, D. P.
- APL Materials, Vol. 2, Issue 11
X-ray photoemission studies of the metal-insulator transition in structures grown by molecular beam epitaxy
journal, December 2009
- Segal, Y.; Ngai, J. H.; Reiner, J. W.
- Physical Review B, Vol. 80, Issue 24
Ionic relaxation contribution to the electronic reconstruction at the -type interface
journal, November 2008
- Pentcheva, Rossitza; Pickett, Warren E.
- Physical Review B, Vol. 78, Issue 20
Works referencing / citing this record:
Design of two-dimensional electron gas systems via polarization discontinuity from large-scale first-principles calculations
journal, January 2018
- Cheng, Jianli; Yang, Kesong
- Journal of Materials Chemistry C, Vol. 6, Issue 25
Scavenging of oxygen from SrTiO 3 during oxide thin film deposition and the formation of interfacial 2DEGs
journal, March 2017
- Posadas, Agham B.; Kormondy, Kristy J.; Guo, Wei
- Journal of Applied Physics, Vol. 121, Issue 10
Band Structure and Spin–Orbital Texture of the (111)‐KTaO 3 2D Electron Gas
journal, March 2019
- Bruno, Flavio Y.; McKeown Walker, Siobhan; Riccò, Sara
- Advanced Electronic Materials, Vol. 5, Issue 5
Electron mobility in oxide heterostructures
journal, June 2018
- Trier, F.; Christensen, D. V.; Pryds, N.
- Journal of Physics D: Applied Physics, Vol. 51, Issue 29
Effect of SrTiO 3 oxygen vacancies on the conductivity of LaTiO 3 /SrTiO 3 heterostructures
journal, November 2018
- Edmondson, Bryce I.; Liu, Shuhaog; Lu, Sirong
- Journal of Applied Physics, Vol. 124, Issue 18
Conductive Oxide Interfaces for Field Effect Devices
journal, June 2019
- Kornblum, Lior
- Advanced Materials Interfaces, Vol. 6, Issue 15
Research Update: Conductivity and beyond at the LaAlO 3 /SrTiO 3 interface
journal, June 2016
- Gariglio, S.; Gabay, M.; Triscone, J. -M.
- APL Materials, Vol. 4, Issue 6
Molecular dynamics simulations of the response of pre-damaged SrTiO 3 and KTaO 3 to fast heavy ions
journal, January 2020
- Zarkadoula, Eva; Zhang, Yanwen; Weber, William J.
- AIP Advances, Vol. 10, Issue 1
First-principles studies of a two-dimensional electron gas at the interface of polar/polar LaAlO 3 /KNbO 3 superlattices
journal, January 2019
- Fang, Le; Chen, Chen; Yang, Yali
- Physical Chemistry Chemical Physics, Vol. 21, Issue 15
Conducting LaVO 3 /SrTiO 3 Interface: Is Cationic Stoichiometry Mandatory?
journal, November 2019
- Tomar, Ruchi; Varma, Rahul Mahavir; Kumar, Nand
- Advanced Materials Interfaces, Vol. 7, Issue 6
The effect of fabrication conditions on 2DEGs transport characteristics at amorphous-LaAlO 3 /KTaO 3 interfaces
journal, May 2019
- Zhang, Hui; Yan, Xi; Zhang, Jing
- Materials Research Express, Vol. 6, Issue 8
Band Structure and Spin–Orbital Texture of the $(111)‐KTaO_{3}$ 2D Electron Gas
text, January 2019
- Bruno, Flavio Y.; McKeown Walker, Siobhan; Riccò, Sara
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
Local structure and defects in ion irradiated KTaO 3
journal, March 2018
- Zhang, F. X.; Xi, J.; Zhang, Y.
- Journal of Physics: Condensed Matter, Vol. 30, Issue 14
A universal method to fabricate p-n or Schottky heterojunctions based on two-dimensional electron gas
journal, December 2019
- Chen, Yu; He, Anpeng; Liu, Guozhen
- Applied Physics Letters, Vol. 115, Issue 24
Strain-driven carrier-type switching of surface two-dimensional electron and hole gases in a KTaO 3 thin film
journal, January 2018
- Zhang, Xue-Jing; Liu, Bang-Gui
- Physical Chemistry Chemical Physics, Vol. 20, Issue 37