Ruijuan Xu
ferroelectricity, thin films, complex oxides, scanning probe microscopy, freestanding membranes
Works (40)
Updated: November 8th, 2024 05:01
2024 article
Flexoelectric Enhancement of Strain Gradient Elasticity Across a Ferroelectric-to-Paraelectric Phase Transition
Harbola, V., Pesquera, D., Xu, R., Ashby, P. D., Martin, L. W., & Hwang, H. Y. (2024, August 12). NANO LETTERS, Vol. 8.
author keywords: Oxides; Ferroelectric; Nanomechanics; Flexoelectricity; Nonlinear elasticity
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 19, 2024
2024 journal article
Highly confined epsilon-near-zero and surface phonon polaritons in SrTiO<sub>3</sub> membranes
NATURE COMMUNICATIONS, 15(1).
open access via www.nature.com (publisher PDF)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(Web of Science)
Sources: ORCID, Web Of Science, NC State University Libraries
Added: July 1, 2024
2024 article
Highly confined epsilon-near-zero and surface phonon polaritons in SrTiO<sub>3</sub> membranes (vol 15, 4743, 2024)
Xu, R., Crassee, I., Bechtel, H. A., Zhou, Y., Bercher, A., Korosec, L., … Liu, Y. (2024, October 2). NATURE COMMUNICATIONS, Vol. 15.
Sources: Web Of Science, NC State University Libraries
Added: October 21, 2024
2023 journal article
Emergent chirality in a polar meron to skyrmion phase transition
NATURE COMMUNICATIONS, 14(1).
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(Web of Science)
Sources: ORCID, Web Of Science, NC State University Libraries
Added: March 19, 2023
2023 article
Size-Induced Ferroelectricity in Antiferroelectric Oxide Membranes
Xu, R., Crust, K. J., Harbola, V., Arras, R., Patel, K. Y., Prosandeev, S., … Hwang, H. Y. (2023, March 19). ADVANCED MATERIALS, Vol. 2.
author keywords: antiferroelectric materials; membranes; phase transition; size effects; sodium niobate
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(Web of Science)
Sources: ORCID, Web Of Science, NC State University Libraries
Added: February 27, 2023
2021 journal article
Emergent chirality in a polar meron to skyrmion transition revealed by 4D-STEM
Microscopy and Microanalysis, 27(S1), 348–350.
Sources: NC State University Libraries, NC State University Libraries
Added: July 7, 2022
2021 journal article
Fracture and fatigue of thin crystalline SrTiO3 membranes
Applied Physics Letters, 119, 053102.
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2021 journal article
Probing the dynamics of ferroelectric topological oscillators with the electron beam
Microscopy and Microanalysis, 27(S1), 690–692.
Sources: NC State University Libraries, NC State University Libraries
Added: July 7, 2022
2021 journal article
Symmetry-aware recursive image similarity exploration for materials microscopy
Npj Computational Materials, 7, 166.
TL;DR:
This tool justifies continued investment in federated scientific databases with standardized metadata schemas where the combination of filtering and recursive interactive searching can uncover synthesis-structure-property relations.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2020 journal article
Beyond substrates: Strain engineering of ferroelectric membranes
Advanced Materials, 32(43), 2003780.
author keywords: complex oxides on silicon; epitaxial lift-off; ferroelectric domain switching; flexible devices; strain engineering
TL;DR:
This approach paves the way toward the fabrication of ultrafast CMOS-compatible ferroelectric memories and ultrasensitive flexible nanosensor devices, and it may also be leveraged for the stabilization of novel phases and functionalities not achievable via direct epitaxial growth.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2020 journal article
Integration of amorphous ferromagnetic oxides with multiferroic materials for room temperature magnetoelectric spintronics
Scientific Reports, 10, 3583.
TL;DR:
RT magneto-electric coupling was demonstrated by modulating the resistance states of spin-valve structures using electric fields, and FDTO served as an excellent top electrode for ferroelectric switching in BiFeO 3 with no sign of degradation after ~10 10 switching cycles.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2020 journal article
Strain-induced room-temperature ferroelectricity in SrTiO3 membranes
Nature Communications, 11, 3141.
TL;DR:
This work reveals the enormous potential of employing oxide membranes to create and enhance ferroelectricity in environmentally benign lead-free oxides, which hold great promise for applications ranging from non-volatile memories and microwave electronics.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2019 journal article
Designing optimal perovskite structure for high ionic conduction
Advanced Materials, 32(1), 1905178.
Sources: Crossref, NC State University Libraries
Added: July 7, 2022
2019 journal article
Freestanding oxide ferroelectric tunnel junction memories transferred onto silicon
Nano Letters, 19(6), 3999–4003.
author keywords: Nonvolatile memories; freestanding; oxides; ferroelectric tunnel junctions; pick and place
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2019 journal article
Kinetic control of tunable, multi-state switching in ferroelectric thin films
Nature Communications, 10, 1282.
TL;DR:
The ability to select any desired intermediate polarization value via control of the switching pathway in (111)-oriented PbZr0.2Ti0.8O3 films is shown, demonstrating an alternative approach that transcends the inherent bi-stability of ferroelectrics to create non-volatile, deterministic, and repeatedly obtainable multi-state polarization.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2019 journal article
Mechanical-force-induced non-local collective ferroelastic switching in epitaxial lead-titanate thin films
Nature Communications, 10, 3951.
TL;DR:
Mechanical-force-induced large-area, non-local, collective ferroelastic domain switching in PbTiO3 epitaxial thin films by tuning the misfit-strain to be near a phase boundary wherein c/a and a 1/a 2 nanodomains coexist.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2018 journal article
Local control of defects and switching properties in ferroelectric thin films
Physical Review Materials, 2(8), 084414.
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2018 journal article
Nonstoichiometry, structure, and properties of Ba1−xTiOy thin films
Journal of Materials Chemistry C, 6, 10751–10759.
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2018 journal article
Reducing coercive-field scaling in ferroelectric thin films via orientation control
ACS Nano, 12(5), 4736–4743.
author keywords: ferroelectric; thin film; size effects; coercive-field scaling; X-ray diffraction
TL;DR:
Overall, this work demonstrates a route toward reducing coercive fields in ferroelectric thin films and provides a possible mechanism to understand the deviation from JKD scaling.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2018 journal article
Understanding the role of ferroelastic domains on the pyroelectric and electrocaloric effects in ferroelectric thin films
Advanced Materials, 31(5), 1803312.
author keywords: electrocaloric effect; entropy; ferroelastic domains; ferroelectricity; pyroelectric effect
TL;DR:
The results demonstrate that temperature- and electric-field-driven domain interconversion under compressive strain diminish both the pyroelectric and the electrocaloric effects, while both these susceptibilities are enhanced due to the exact-opposite effect from the extrinsic contributions under tensile strain.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2017 journal article
Differential voltage amplification from ferroelectric negative capacitance
Applied Physics Letters, 111, 253501.
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2017 journal article
Electron Accumulation and Emergent Magnetism in LaMnO3 / SrTiO3 Heterostructures
Physical Review Letters, 119(15), 156801.
TL;DR:
The disentanglement of critical thicknesses for electron reconstruction and the emergence of ferromagnetism in polar-mismatched LaMnO_3/SrTiO_{3} (001) heterostructures are reported, extending the limits of the ability to synthesize and tailor emergent phenomena at interfaces and demonstrating manipulation of the electronic and magnetic structures of materials at the shortest length scales.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2017 journal article
Electronic Transport and Ferroelectric Switching in Ion-Bombarded, Defect-Engineered BiFeO3 Thin Films
Advanced Materials Interfaces, 5(3), 1700991.
author keywords: bismuth ferrite; ferroelectric thin films; ion bombardment; leakage; polarization switching
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2017 journal article
Ferroelectricity in Pb1+δZrO3 Thin Films
Chemistry of Materials, 29(15), 6544–6551.
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2017 journal article
Slow Conductance Relaxation in Graphene–Ferroelectric Field-Effect Transistors
Journal of Physical Chemistry C, 121(13), 7542–7548.
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2017 journal article
Three-State Ferroelastic Switching and Large Electromechanical Responses in PbTiO3 Thin Films
Advanced Materials, 29(37), 1702069.
Contributors: A. Damodaran *, S. Pandya *, J. Agar *, Y. Cao *, R. Vasudevan *, * , S. Saremi *, Q. Li *
author keywords: electromechanical responses; ferroelectrics; thin-film epitaxy; three-state ferroelastic switching
TL;DR:
It is demonstrated that deterministic, nonvolatile writing/erasure of large-area patterns of this electromechanical response is possible, thus showing a new pathway to improved function and properties.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: July 7, 2022
2016 journal article
Enhanced electrical resistivity and properties via ion bombardment of ferroelectric thin films
Advanced Materials, 28(48), 10750–10756.
TL;DR:
A novel approach to on-demand improvement of electronic properties in complex-oxide ferroelectrics is demonstrated whereby ion bombardment is applied to the PbTiO3 system, causing deterministic reduction in leakage currents, improved ferroelectric switching, and unprecedented insights into the nature of defects and intergap state evolution in these materials.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2016 journal article
Frontiers in strain-engineered multifunctional ferroic materials
MRS Communications, 6, 151–166.
Sources: NC State University Libraries, NC State University Libraries
Added: July 7, 2022
2016 journal article
Nanodomain Engineering in Ferroelectric Capacitors with Graphene Electrodes
Nano Letters, 16(10), 6460–6466.
author keywords: Flexoelectric switching; graphene; domain engineering; ferroelectric films
TL;DR:
This paper demonstrates mechanical writing of arbitrary-shaped nanoscale domains in thin-film ferroelectric capacitors with graphene electrodes facilitated by a strain gradient induced by a tip of an atomic force microscope (AFM).
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2016 journal article
New modalities of strain-control of ferroelectric thin films
Journal of Physics: Condensed Matter, 28(26), 263001.
author keywords: ferroelectrics; thin films; epitaxy; strain
TL;DR:
How these new approaches to strain engineering provide promising routes to control and decouple ferroelectric susceptibilities and create new modes of response not possible in the confines of conventional strain engineering is discussed.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2016 journal article
Self-Assembled, Nanostructured, Tunable Metamaterials via Spinodal Decomposition
ACS Nano, 10(11), 10237–10244.
author keywords: self-assembly; spinodal decomposition; nanoscale phase separation; metamaterials; VO2; epitaxial thin films
TL;DR:
A bottom-up approach to fabricate scalable nanostructured metamaterials via spinodal decomposition is demonstrated, providing an efficient route for the fabrication of nanostructure-based nanomaterials and other nanocomposites for desired functionalities.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2016 journal article
Single gate P-N junctions in graphene-ferroelectric devices
Applied Physics Letters, 108, 203109.
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2016 journal article
Strain-induced growth instability and nanoscale surface patterning in perovskite thin films
Scientific Reports, 6, 26075.
TL;DR:
A growth-mode transition from 2D-step flow to self-organized, nanoscale 3D-island formation in PbZr0.2Ti0.8O3/SrRuO3./SrTiO3 (001) heterostructures as the kinetics of the growth process respond to the evolution of strain is demonstrated.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2015 journal article
Orientation-dependent structural phase diagrams and dielectric properties of PbZr1−xTixO3 polydomain thin films
Physical Review B, 91(14), 144106.
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2015 journal article
Surface Chemically Switchable Ultraviolet Luminescence from Interfacial Two-Dimensional Electron Gas
Nano Letters, 16(1), 681–687.
author keywords: Two-dimensional electron gas; photoluminescence; LaAlO3/SrTiO3; chemisorption
MeSH headings : Aluminum Oxide / chemistry; Biosensing Techniques; Electrons; Gases / chemistry; Luminescence; Oxides / chemistry; Strontium / chemistry; Surface Properties; Titanium / chemistry; Ultraviolet Rays
TL;DR:
Connections between reversible chemisorption, fast electron transfer, and quantum-well luminescence suggest a new model for surface chemically reconfigurable solid-state UV optoelectronics and molecular sensing.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2014 journal article
Effect of “symmetry mismatch” on the domain structure of rhombohedral BiFeO3 thin films
Applied Physics Letters, 104, 182908.
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2014 journal article
Ferroelectric polarization reversal via successive ferroelastic transitions
Nature Materials, 14, 79–86.
TL;DR:
A combination of thin-film epitaxy, macro- and nanoscale property and switching characterization, and molecular dynamics simulations are used to elucidate the nature of switching in PbZr( 0.2)Ti(0.8)O3 thin films and offer opportunities to change domain reversal speed.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2014 journal article
Stationary domain wall contribution to enhanced ferroelectric susceptibility
Nature Communications, 5, 3120.
TL;DR:
The measurement of stationary domain wall contributions to permittivity in PbZr( 0.2)Ti(0.8)O₃ films offers new insights into the microscopic origin of dielectric enhancement and provides a pathway to engineer the dielectrics response of materials.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2014 journal article
Understanding order in compositionally graded ferroelectrics: Flexoelectricity, gradient, and depolarization field effects
Physical Review B, 89(22), 224101.
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
2013 journal article
Tunable Carrier Type and Density in Graphene/PbZr0.2Ti0.8O3 Hybrid Structures through Ferroelectric Switching
Nano Letters, 13(4), 1693–1698.
author keywords: CVD graphene; ferroelectrics; PbZr0.2Ti0.8O3; polarization reversal; interface
MeSH headings : Electrodes; Graphite / chemistry; Iron / chemistry; Lead / chemistry; Semiconductors; Titanium / chemistry; Zirconium / chemistry
TL;DR:
Bidirectional interdependency between graphene doping level and ferroelectric polarization is demonstrated in graphene/PbZr0.2Ti0.8O3 hybrid structures and a complete reversal of the current-voltage hysteresis direction is observed in the graphene.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: July 7, 2022
Employment
Updated: February 27th, 2023 14:50
2022 - present
NC State University Raleigh, North Carolina, US
Assistant Professor
Materials Science and Engineering
Education
Updated: February 27th, 2023 14:57
2018 - 2022
Stanford University Stanford, CA, US
Postdoctoral Fellow
Applied Physics
2014 - 2018
University of California Berkeley Berkeley, CA, US
Ph.D.
Materials Science and Engineering
2011 - 2014
University of Illinois at Urbana-Champaign Urbana, IL, US
M.S.
Materials Science and Engineering
2007 - 2011
Zhejiang University Hangzhou, Zhejiang, CN
B.E.
Materials Science and Engineering
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