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Title: Engineering two-dimensional superconductivity and Rashba spin–orbit coupling in LaAlO3/SrTiO3 quantum wells by selective orbital occupancy

Abstract

The discovery of two-dimensional electron gases (2DEGs) at oxide interfaces—involving electrons in narrow d-bands—has broken new ground, enabling the access to correlated states that are unreachable in conventional semiconductors based on s- and p- electrons. There is a growing consensus that emerging properties at these novel quantum wells—such as 2D superconductivity and magnetism --are intimately connected to specific orbital symmetries in the 2DEG sub-band structure. Here we show that crystal orientation allows selective orbital occupancy, disclosing unprecedented ways to tailor the 2DEG properties. By carrying out electrostatic gating experiments in LaAlO3/SrTiO3 wells of different crystal orientations, we show that the spatial extension and anisotropy of the 2D superconductivity and the Rashba spin–orbit field can be largely modulated by controlling the 2DEG sub-band filling. Such an orientational tuning expands the possibilities for electronic engineering of 2DEGs at LaAlO3/SrTiO3 interfaces.

Authors:
 [1];  [2];  [3];  [3];  [3];  [1];  [4];  [5];  [1];  [1];  [1]
  1. Institute of Material Science of Barcelona (ICMAB-CSIC), Catalonia (Spain)
  2. PSL Univ., Paris (France). Lab. of Physics and Material studies
  3. PSL Univ., Paris (France). Lab. of Physics and Material studies
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division; Univ. Complutense Madrid (Spain)
  5. Institute of Material Science of Barcelona (ICMAB-CSIC), Catalonia (Spain); Univ. Autonoma de Barcelona (Spain). Dept. of Physics
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1259677
Alternate Identifier(s):
OSTI ID: 1265456
Grant/Contract Number:  
RyC-2012-11709; AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 36 MATERIALS SCIENCE

Citation Formats

Herranz, Gervasi, Singh, Gyanendra, Bergeal, Nicolas, Jouan, Alexis, Lesueur, Jérôme, Gázquez, Jaume, Varela, María, Scigaj, Mateusz, Dix, Nico, Sánchez, Florencio, and Fontcuberta, Josep. Engineering two-dimensional superconductivity and Rashba spin–orbit coupling in LaAlO3/SrTiO3 quantum wells by selective orbital occupancy. United States: N. p., 2015. Web. doi:10.1038/ncomms7028.
Herranz, Gervasi, Singh, Gyanendra, Bergeal, Nicolas, Jouan, Alexis, Lesueur, Jérôme, Gázquez, Jaume, Varela, María, Scigaj, Mateusz, Dix, Nico, Sánchez, Florencio, & Fontcuberta, Josep. Engineering two-dimensional superconductivity and Rashba spin–orbit coupling in LaAlO3/SrTiO3 quantum wells by selective orbital occupancy. United States. https://doi.org/10.1038/ncomms7028
Herranz, Gervasi, Singh, Gyanendra, Bergeal, Nicolas, Jouan, Alexis, Lesueur, Jérôme, Gázquez, Jaume, Varela, María, Scigaj, Mateusz, Dix, Nico, Sánchez, Florencio, and Fontcuberta, Josep. Tue . "Engineering two-dimensional superconductivity and Rashba spin–orbit coupling in LaAlO3/SrTiO3 quantum wells by selective orbital occupancy". United States. https://doi.org/10.1038/ncomms7028. https://www.osti.gov/servlets/purl/1259677.
@article{osti_1259677,
title = {Engineering two-dimensional superconductivity and Rashba spin–orbit coupling in LaAlO3/SrTiO3 quantum wells by selective orbital occupancy},
author = {Herranz, Gervasi and Singh, Gyanendra and Bergeal, Nicolas and Jouan, Alexis and Lesueur, Jérôme and Gázquez, Jaume and Varela, María and Scigaj, Mateusz and Dix, Nico and Sánchez, Florencio and Fontcuberta, Josep},
abstractNote = {The discovery of two-dimensional electron gases (2DEGs) at oxide interfaces—involving electrons in narrow d-bands—has broken new ground, enabling the access to correlated states that are unreachable in conventional semiconductors based on s- and p- electrons. There is a growing consensus that emerging properties at these novel quantum wells—such as 2D superconductivity and magnetism --are intimately connected to specific orbital symmetries in the 2DEG sub-band structure. Here we show that crystal orientation allows selective orbital occupancy, disclosing unprecedented ways to tailor the 2DEG properties. By carrying out electrostatic gating experiments in LaAlO3/SrTiO3 wells of different crystal orientations, we show that the spatial extension and anisotropy of the 2D superconductivity and the Rashba spin–orbit field can be largely modulated by controlling the 2DEG sub-band filling. Such an orientational tuning expands the possibilities for electronic engineering of 2DEGs at LaAlO3/SrTiO3 interfaces.},
doi = {10.1038/ncomms7028},
journal = {Nature Communications},
number = ,
volume = 6,
place = {United States},
year = {2015},
month = {1}
}

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Works referenced in this record:

Intrinsic spin-orbit coupling in superconducting δ -doped SrTiO 3 heterostructures
journal, August 2012


Giant spin splitting of the two-dimensional electron gas at the surface of SrTiO3
journal, October 2014

  • Santander-Syro, A. F.; Fortuna, F.; Bareille, C.
  • Nature Materials, Vol. 13, Issue 12
  • DOI: 10.1038/nmat4107

Theory of t 2 g electron-gas Rashba interactions
journal, July 2013


Two-Dimensional Superconducting Phase in LaTiO 3 / SrTiO 3 Heterostructures Induced by High-Mobility Carrier Doping
journal, June 2012


Metallic and Insulating Oxide Interfaces Controlled by Electronic Correlations
journal, February 2011


Two-Dimensional Electron Gases at LaAlO 3 / SrTiO 3 Interfaces: Orbital Symmetry and Hierarchy Engineered by Crystal Orientation
journal, October 2014


Berezinskii-Kosterlitz-Thouless Transition to the Superconducting State of Heavy-Fermion Superlattices
journal, August 2012


Gate-Controlled Spin Injection at LaAlO 3 / SrTiO 3 Interfaces
journal, April 2012


Facetting and (n×1) reconstructions of SrTiO3(110) surfaces
journal, January 2005


Density and spatial distribution of charge carriers in the intrinsic n -type LaAlO 3 -SrTiO 3 interface
journal, June 2009


LaAlO3 stoichiometry is key to electron liquid formation at LaAlO3/SrTiO3 interfaces
journal, August 2013

  • Warusawithana, M. P.; Richter, C.; Mundy, J. A.
  • Nature Communications, Vol. 4, Issue 1
  • DOI: 10.1038/ncomms3351

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
  • DOI: 10.1038/nature07576

Anisotropic two-dimensional electron gas at SrTiO3(110)
journal, March 2014

  • Wang, Z.; Zhong, Z.; Hao, X.
  • Proceedings of the National Academy of Sciences, Vol. 111, Issue 11
  • DOI: 10.1073/pnas.1318304111

Polar Discontinuity Doping of the LaVO 3 / SrTiO 3 Interface
journal, December 2007


Magnetoresistance in Two-Dimensional Disordered Systems: Effects of Zeeman Splitting and Spin-Orbit Scattering
journal, August 1981

  • Maekawa, Sadamichi; Fukuyama, Hidetoshi
  • Journal of the Physical Society of Japan, Vol. 50, Issue 8
  • DOI: 10.1143/JPSJ.50.2516

Tailored surfaces of perovskite oxide substrates for conducted growth of thin films
journal, January 2014

  • Sánchez, Florencio; Ocal, Carmen; Fontcuberta, Josep
  • Chem. Soc. Rev., Vol. 43, Issue 7
  • DOI: 10.1039/C3CS60434A

Crystal orientation effects on electronic and optical properties of wurtzite ZnO/MgZnO quantum well lasers
journal, January 2007


Electric Field Tuning of the Rashba Effect in the Polar Perovskite Structures
journal, February 2014


A note on the Maximum Critical Field of High‐Field Superconductors
journal, September 1962

  • Chandrasekhar, B. S.
  • Applied Physics Letters, Vol. 1, Issue 1
  • DOI: 10.1063/1.1777362

Orbital Reconstruction and the Two-Dimensional Electron Gas at the LaAlO3/SrTiO3 Interface
journal, April 2009


Rashba induced magnetoconductance oscillations in the LaAlO 3 -SrTiO 3 heterostructure
journal, November 2012


Anisotropy of the superconducting transport properties of the LaAlO3/SrTiO3 interface
journal, March 2009

  • Reyren, N.; Gariglio, S.; Caviglia, A. D.
  • Applied Physics Letters, Vol. 94, Issue 11
  • DOI: 10.1063/1.3100777

Atomic Control of the SrTiO3 Crystal Surface
journal, December 1994


Polarization fields of III-nitrides grown in different crystal orientations
journal, September 2007


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
  • DOI: 10.1038/ncomms1084

Two-dimensional electron gas with universal subbands at the surface of SrTiO3
journal, January 2011

  • Santander-Syro, A. F.; Copie, O.; Kondo, T.
  • Nature, Vol. 469, Issue 7329, p. 189-193
  • DOI: 10.1038/nature09720

High mobility conduction at (110) and (111) LaAlO3/SrTiO3 interfaces
journal, October 2012

  • Herranz, G.; Sánchez, F.; Dix, N.
  • Scientific Reports, Vol. 2, Issue 1
  • DOI: 10.1038/srep00758

Structure and electronic states on reduced SrTiO3(110) surface observed by scanning tunneling microscopy and spectroscopy
journal, May 1995

  • Bando, H.
  • Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, Vol. 13, Issue 3
  • DOI: 10.1116/1.588227

Anisotropic two-dimensional electron gas at the LaAlO3/SrTiO3 (110) interface
journal, May 2013

  • Annadi, A.; Zhang, Q.; Renshaw Wang, X.
  • Nature Communications, Vol. 4, Issue 1
  • DOI: 10.1038/ncomms2804

Conducting interfaces between band insulating oxides: The LaGaO3/SrTiO3 heterostructure
journal, October 2010

  • Perna, P.; Maccariello, D.; Radovic, M.
  • Applied Physics Letters, Vol. 97, Issue 15
  • DOI: 10.1063/1.3496440

Discovery of superconductivity in KTaO3 by electrostatic carrier doping
journal, May 2011

  • Ueno, K.; Nakamura, S.; Shimotani, H.
  • Nature Nanotechnology, Vol. 6, Issue 7
  • DOI: 10.1038/nnano.2011.78

Two-dimensional normal-state quantum oscillations in a superconducting heterostructure
journal, November 2009

  • Kozuka, Y.; Kim, M.; Bell, C.
  • Nature, Vol. 462, Issue 7272, p. 487-490
  • DOI: 10.1038/nature08566

Multiple quantum criticality in a two-dimensional superconductor
journal, April 2013

  • Biscaras, J.; Bergeal, N.; Hurand, S.
  • Nature Materials, Vol. 12, Issue 6
  • DOI: 10.1038/nmat3624

Transport in ferromagnetic GdTiO3/SrTiO3 heterostructures
journal, March 2011

  • Moetakef, Pouya; Zhang, Jack Y.; Kozhanov, Alexander
  • Applied Physics Letters, Vol. 98, Issue 11
  • DOI: 10.1063/1.3568894

Ordering, metastability and phase transitions in two-dimensional systems
journal, April 1973

  • Kosterlitz, J M; Thouless, D J
  • Journal of Physics C: Solid State Physics, Vol. 6, Issue 7, p. 1181-1203
  • DOI: 10.1088/0022-3719/6/7/010

Possibility of Vortex-Antivortex Pair Dissociation in Two-Dimensional Superconductors
journal, April 1979

  • Beasley, M. R.; Mooij, J. E.; Orlando, T. P.
  • Physical Review Letters, Vol. 42, Issue 17, p. 1165-1168
  • DOI: 10.1103/PhysRevLett.42.1165

A high-mobility electron gas at the LaAlO3/SrTiO3 heterointerface
journal, January 2004


Direct k -Space Mapping of the Electronic Structure in an Oxide-Oxide Interface
journal, June 2013


Superconducting Interfaces Between Insulating Oxides
journal, August 2007


Crystal orientation effects on electronic properties of wurtzite InGaN/GaN quantum wells
journal, January 2002

  • Park, Seoung-Hwan
  • Journal of Applied Physics, Vol. 91, Issue 12
  • DOI: 10.1063/1.1480465

Electrostatically-tuned superconductor-metal-insulator quantum transition at the LaAlO 3 / SrTiO 3 interface
journal, May 2009


Artificial charge-modulationin atomic-scale perovskite titanate superlattices
journal, September 2002

  • Ohtomo, A.; Muller, D. A.; Grazul, J. L.
  • Nature, Vol. 419, Issue 6905
  • DOI: 10.1038/nature00977

Nonlinear Hall effect and multichannel conduction in LaTiO 3 / SrTiO 3 superlattices
journal, November 2010


A high-mobility two-dimensional electron gas at the spinel/perovskite interface of γ-Al2O3/SrTiO3
journal, January 2013

  • Chen, Y. Z.; Bovet, N.; Trier, F.
  • Nature Communications, Vol. 4, Issue 1
  • DOI: 10.1038/ncomms2394

Step formation, faceting, and bunching in atomically flat SrTiO3 (110) surfaces
journal, December 2007

  • Bachelet, R.; Valle, F.; Infante, I. C.
  • Applied Physics Letters, Vol. 91, Issue 25
  • DOI: 10.1063/1.2825586

Enhancement of superconductivity by a parallel magnetic field in two-dimensional superconductors
journal, August 2011

  • Jeffrey Gardner, H.; Kumar, Ashwani; Yu, Liuqi
  • Nature Physics, Vol. 7, Issue 11
  • DOI: 10.1038/nphys2075

Tunable Rashba Spin-Orbit Interaction at Oxide Interfaces
journal, March 2010


Quasi-ideal strontium titanate crystal surfaces through formation of strontium hydroxide
journal, November 1998

  • Koster, Gertjan; Kropman, Boike L.; Rijnders, Guus J. H. M.
  • Applied Physics Letters, Vol. 73, Issue 20
  • DOI: 10.1063/1.122630

Tuning Spin-Orbit Coupling and Superconductivity at the SrTiO 3 / LaAlO 3 Interface: A Magnetotransport Study
journal, March 2010


Interfacial dielectric layer as an origin of polarization fatigue in ferroelectric capacitors
journal, April 2020


Works referencing / citing this record:

Interface Engineering and Emergent Phenomena in Oxide Heterostructures
journal, August 2018


Diluted Oxide Interfaces with Tunable Ground States
journal, January 2019

  • Gan, Yulin; Christensen, Dennis Valbjørn; Zhang, Yu
  • Advanced Materials, Vol. 31, Issue 10
  • DOI: 10.1002/adma.201805970

Progress and Perspectives of Atomically Engineered Perovskite Oxide Interfaces for Electronics and Electrocatalysts
journal, May 2019

  • Chen, Yunzhong; Green, Robert J.
  • Advanced Materials Interfaces, Vol. 6, Issue 15
  • DOI: 10.1002/admi.201900547

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
  • DOI: 10.1002/aelm.201800860

Strong correlations elucidate the electronic structure and phase diagram of LaAlO3/SrTiO3 interface
journal, September 2015

  • Maniv, E.; Shalom, M. Ben; Ron, A.
  • Nature Communications, Vol. 6, Issue 1
  • DOI: 10.1038/ncomms9239

Anomalous orbital structure in a spinel–perovskite interface
journal, August 2016


Competition between electron pairing and phase coherence in superconducting interfaces
journal, January 2018


Interface-based tuning of Rashba spin-orbit interaction in asymmetric oxide heterostructures with 3d electrons
journal, July 2019


Planar Hall effect and anisotropic magnetoresistance in polar-polar interface of LaVO3-KTaO3 with strong spin-orbit coupling
journal, February 2020


Gap suppression at a Lifshitz transition in a multi-condensate superconductor
journal, May 2019


Direct imaging of the electron liquid at oxide interfaces
journal, February 2018


Off-Stoichiometry Driven Carrier Density Variation at the Interface of LaAlO3/SrTiO3
journal, May 2017


Effect of Nb concentration on the spin-orbit coupling strength in Nb-doped SrTiO3 epitaxial thin films
journal, April 2018


Electron—phonon Coupling and the Superconducting Phase Diagram of the LaAlO3—SrTiO3 Interface
journal, July 2015

  • Boschker, Hans; Richter, Christoph; Fillis-Tsirakis, Evangelos
  • Scientific Reports, Vol. 5, Issue 1
  • DOI: 10.1038/srep12309

Gate dependence of upper critical field in superconducting (110) LaAlO3/SrTiO3 interface
journal, July 2016

  • Shen, S. C.; Chen, B. B.; Xue, H. X.
  • Scientific Reports, Vol. 6, Issue 1
  • DOI: 10.1038/srep28379

Strain-induced indirect-to-direct bandgap transition in an np-type LaAlO 3 /SrTiO 3 (110) superlattice
journal, January 2019

  • Wang, L.; Pan, W.; Hu, W. X.
  • Physical Chemistry Chemical Physics, Vol. 21, Issue 13
  • DOI: 10.1039/c8cp07761d

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
  • DOI: 10.1063/1.4953822

Electrostatic tuning of magnetism at the conducting (111) (La 0.3 Sr 0.7 )(Al 0.65 Ta 0.35 )/SrTiO 3 interface
journal, August 2017

  • Bal, V. V.; Huang, Z.; Han, K.
  • Applied Physics Letters, Vol. 111, Issue 8
  • DOI: 10.1063/1.4986912

Interface chemical and electronic properties of LaAlO 3 /SrVO 3 heterostructures
journal, February 2018

  • Fouchet, Arnaud; Rault, Julien E.; Allain, Mickaël
  • Journal of Applied Physics, Vol. 123, Issue 5
  • DOI: 10.1063/1.4998004

Kondo effect with tunable spin–orbit interaction in LaTiO 3 /CeTiO 3 /SrTiO 3 heterostructure
journal, June 2018

  • Ghising, Pramod; Das, Debarchan; Das, Shubhankar
  • Journal of Physics: Condensed Matter, Vol. 30, Issue 28
  • DOI: 10.1088/1361-648x/aac977

Optical second harmonic generation from LaAlO 3 /SrTiO 3 interfaces with different in-plane anisotropies
journal, December 2019

  • Rubano, Andrea; Scigaj, Mateusz; Sánchez, Florencio
  • Journal of Physics: Condensed Matter, Vol. 32, Issue 13
  • DOI: 10.1088/1361-648x/ab5ccc

Physics of SrTiO 3 -based heterostructures and nanostructures: a review
journal, February 2018

  • Pai, Yun-Yi; Tylan-Tyler, Anthony; Irvin, Patrick
  • Reports on Progress in Physics, Vol. 81, Issue 3
  • DOI: 10.1088/1361-6633/aa892d

Tunable spin and orbital polarization in SrTiO 3 -based heterostructures
journal, October 2019


The effect of fabrication conditions on 2DEGs transport characteristics at amorphous-LaAlO 3 /KTaO 3 interfaces
journal, May 2019


Gate-tunable Rashba spin-orbit coupling and spin polarization at diluted oxide interfaces
journal, September 2019


Anomalies of upper critical field in the spinel superconductor LiTi 2 O 4 δ
journal, November 2019


Influence of Rashba spin-orbit coupling on the 0- π transition and Kondo temperature in one-dimensional superconductors
journal, December 2019


Giant crystalline anisotropic magnetoresistance in nonmagnetic perovskite oxide heterostructures
journal, April 2017


Six-fold crystalline anisotropic magnetoresistance in the (111) LaAlO 3 / SrTiO 3 oxide interface
journal, June 2017


Two-dimensional superconductivity at the (111) LaAlO 3 / SrTiO 3 interface
journal, July 2017


Effect of disorder on superconductivity and Rashba spin-orbit coupling in LaAlO 3 / SrTiO 3 interfaces
journal, July 2017


Two-dimensional electron systems in A TiO 3 perovskites ( A = Ca , Ba, Sr): Control of orbital hybridization and energy order
journal, July 2017


Modified spin relaxation mechanism by tunable coupling between interfacial two-dimensional electron gases in correlated oxide heterostructures
journal, August 2017


Magnetic two-dimensional electron gases with high Curie temperatures at LaAl O 3 / SrTi O 3 : Fe interfaces
journal, April 2018


Superconducting fluctuations and characteristic time scales in amorphous WSi
journal, May 2018


Nonreciprocal charge transport in two-dimensional noncentrosymmetric superconductors
journal, August 2018


Link between the Superconducting Dome and Spin-Orbit Interaction in the (111) LaAlO 3 / SrTi O 3 Interface
journal, December 2017


Nonreciprocal Current in Noncentrosymmetric Rashba Superconductors
journal, July 2018


Superconducting Tunneling Spectroscopy of Spin-Orbit Coupling and Orbital Depairing in Nb : SrTiO 3
journal, October 2018


Photoinduced Rashba Spin-to-Charge Conversion via an Interfacial Unoccupied State
journal, June 2019


Orbital-adapted electronic structure and anisotropic transport in γ Al 2 O 3 / SrTiO 3 heterostructure
journal, January 2020


Majorana Fermions in One-Dimensional Structures at LaAlO3/SrTiO3 Oxide Interfaces
journal, October 2018

  • Mazziotti, Maria; Scopigno, Niccolò; Grilli, Marco
  • Condensed Matter, Vol. 3, Issue 4
  • DOI: 10.3390/condmat3040037