NANOIONICS AT THE INTERFACE:
CHARGE, PHONON, AND SPIN TRANSPORT
GOALS
This IRG aims to discover the coupling mechanisms between oxygen defects and the transport of phonons, spin and charge at the interfaces of metal oxides, with transformative implications for energy and information technologies. Recent investigations of novel electronic and magnetic properties of complex oxide superlattices have led to tantalizing discoveries. A prime example is the high mobility metallic state found at the interfaces of LaAlO3/SrTiO3 superlattices, composed of materials both of which individually are insulating. The study of the confinement of electrons at these interfaces, and superlattices generally, has had an extraordinary impact on our understanding of important phenomena that can enable high electron mobility devices. Now, a tremendous opportunity exists to achieve further breakthroughs in understanding the role of confinement near oxide interfaces on ionic defect stability and mobility, an area previously defined as nanoionics. Although many structural and electronic factors are known to affect interface properties, we believe oxygen defects play a central role in these phenomena, but their role has thus far been under-explored. While the study of the charge transport behavior of ionic materials at the nanoscale has been pursued for the past decade, this project extends these efforts into entirely new directions by offering means to manipulate and couple the transport of ions, charge, phonons, and magnetic spin.
This ability will enable novel energy-relevant devices such as electrically controlled heat valves, and high efficiency energy conversion platforms such as thermoelectrics and fuel cells, as well as high density and fast memory and logic computing platforms such as memristive and magnetoelectronic devices. Our proposal brings forth two key attributes that set this IRG apart from the existing field of defect studies in oxides. First is the novel and cross-disciplinary merging of nanoionics, phononics, magnetics and electrochemistry, which offers fertile ground for many scientific discoveries by examining the interrelated behavior of ionic defects, charge, spin and phonons. This capacity confers the ability to tune the defect chemistry and ion transport, and to examine their impact in a coupled manner on charge, spin and phonon transport, and magnetic properties. Second is the suite of new capabilities developed by the PIs in this IRG, integrating novel synthesis of nanoscale superlattices characterized by vertical and lateral interfaces, in situ characterization, and multiscale modeling and simulation from the atomic to the mesoscale. By in situ characterization, we mean the ability to perform measurements with very high spatial and temporal resolution in the presence of elevated temperatures (up to ~1000 °C), high electric fields and chemically reactive gases. This approach to identify and interpret, for example, phonon scattering, strain induced oxygen diffusion, and defect induced magnetization at interfaces, presents a powerful predictive capability for designing new materials.
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Caroline A. Ross |
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Bilge Yildiz |
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Geoffrey S. Beach |
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Gang Chen |
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Harry L. Tuller |
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Krystyn J. Van Vliet |
HIGHLIGHTS
2020
Voltage Control of Optical Properties by Ionic Gating
Voltage Control of Magnetism above Room Temperature in Epitaxial SCFO
2019
Electrical control of magnetic properties in thin films by hydrogen gating
Reversible thermal conductivity in epitaxial WO3 films
2018
Strong Electric Fields Tune the Stability of Ionic Defects in Oxides
Microstructure and Magnetic Tuning in Oxygen-Deficient Sr(Ti,Co)O3-δ
Materials Deficient in Oxygen Show Promise in Magnetically Controlled Optical Devices
2015
Strain coupling in oxide nano-composites controls magnetism and oxygen exchange kinetics
PUBLICATIONS
2020
Ning, S., Zhang, Q.Q., Occhialini, C., Comin, R., Zhong, X.Y., and Ross, CA.. "Voltage Control of Magnetism above Room Temperature in Epitaxial SrCo1-xFexO3-delta." ACS Nano, 14(7): 8949-8957, July 2020. <DOI: 10.1021/acsnano.0c03750>
Yao, X.H., Klyukin, K., Lu, W.J., Onen, M., Ryu, S., Kim, D., Emond, N., Waluyo, I., Hunt, A., del Alamo, J.A., Li, J., and Yildiz, B. "Protonic solid-state electrochemical synapse for physical neural networks." Nature Communications, 11(1), June 2020. <DOI: 10.1038/s41467-020-16866-6>
Lu, Q., Huberman, S., Zhang, H., Song, Q., Wang, J., Vardar, G., Hunt, A., Waluyo, I., Chen, G., and Yildiz, B. “Bi-Directional Tuning of Thermal Transport in SrCoOx with Electrochemically Induced Phase Transitions” Nature Materials (2020): doi:10.1038/s41563-020-0612-0
Lee, KY., Jo, S., Tan, A.J., Huang, M., Choi, D., Park, J.H., Ji, H.I., Son, J.W., Chang, J., Beach, G.S.D., and Woo, S. "Fast Magneto-Ionic Switching of Interface Anisotropy Using Yttria-Stabilized Zirconia Gate Oxide." Nano Letters, 20(5): 3435-3441, May 2020. <DOI: 0.1021/acs.nanolett.0c00340>
2019
Fabris, F., Tu, K.-H., Ross, C. A., and Nunes, W. C. “Influence of Dipolar Interactions on the Magnetic Properties of Superparamagnetic Particle Systems” Journal of Applied Physics 126, no. 17 (2019): 173905. doi:10.1063/1.5125595
Ning, S., Huberman, S. C., Ding, Z., Nahm, H. H., Kim, Y. H., Kim, H. S., Chen, G., and Ross, C. A. “Anomalous Defect Dependence of Thermal Conductivity in Epitaxial WO3 Thin Films” Advanced Materials (2019): 1903738. doi:10.1002/adma.201903738
Huang, M., Tan, A. J., Büttner, F., Liu, H., Ruan, Q., Hu, W., Mazzoli, C., Wilkins, S., Duan, C., Yang, J. K. W., and Beach, G. S. D. “Voltage-Gated Optics and Plasmonics Enabled by Solid-State Proton Pumping” Nature Communications 10, no. 1 (2019): doi:10.1038/s41467-019-13131-3
Wang, J., Bishop, S. R., Sun, L., Lu, Q., Vardar, G., Bliem, R., Tsvetkov, N., Crumlin, E. J., Gallet, J.-J., Bournel, F., Waluyo, I., and Yildiz, B. “Threshold Catalytic Onset of Carbon Formation on CeO2 during CO2 Electrolysis: Mechanism and Inhibition” Journal of Materials Chemistry A 7, no. 25 (2019): 15233–15243. doi:10.1039/c9ta03265g
Tang, A. S., Pelliciari, J., Song, Q., Song, Q., Ning, S., Freeland, J. W., Comin, R., and Ross, C. A. “XMCD Study of Magnetism and Valence State in Iron-Substituted Strontium Titanate” Physical Review Materials 3, no. 5 (2019): doi:10.1103/physrevmaterials.3.054408
Kim, D. H., Ning, S., and Ross, C. A. “Self-Assembled Multiferroic Perovskite–Spinel Nanocomposite Thin Films: Epitaxial Growth, Templating and Integration on Silicon.” Journal of Materials Chemistry C, 7(30): 9128–9148, 2019. doi:10.1039/c9tc02033k
Tan, A. J., Huang, M., Sheffels, S., Büttner, F., Kim, S., Hunt, A. H., Waluyo, I., Tuller, H. L., and Beach, G. S. D. “Hydration of Gadolinium Oxide (GdOx) and Its Effect on Voltage-Induced Co Oxidation in a Pt/Co/GdOx/Au Heterostructure.” Physical Review Materials 3(6), 2019. <doi:10.1103/physrevmaterials.3.064408>
Tang, A., Pelliciari, J., Song, Q., Song, Q., Ning, S., Freeland, J.W., Comin, R., and Ross, C. A. "XMCD study of magnetism and valence state in iron-substituted strontium titanate." Physical Review Materials, May 2019. <DOI: 10.1103/PhysRevMaterials.00.004400>
Tan, A.J., Huang, M.T., Avci, C.O., Buttner, F., Mann, M., Hu, W., Mazzoli, C., Wilkins, S., Tuller, H.L., and Beach, G.S.D. "Magneto-ionic control of magnetism using a solid-state proton pump." Nature Materials, 18(1): 35+, January 2019. <DOI: 10.1038/s41563-018-0211-5>
Opazo, M.A., Ong, S.P., Vargas, P., Ross, C.A., and Florez, J.M. "Oxygen-vacancy tuning of magnetism in SrTi0.75Fe0.125Co0.125O3- δ perovskite." Physical Review Materials, 3(1): Article 014404. <DOI: 10.1103/PhysRevMaterials.3.014404>
2018
Sun, Y.F., Kotiuga, M., Lim, D., Narayanan, B., Cherukara, M., Zhang, Z., Dong, Y.Q., Kou, R.H., Sun, C.J., Lu, Q.Y., Waluyo, I., Hunt, A., Tanaka, H., Hattori, A.N., Gamage, S., Abate, Y., Pol, V.G., Zhou, H., Sankaranarayanan, S.K.R.S., Yildiz, B., Rabe, K.M., and Ramanathan, S. "Strongly correlated perovskite lithium ion shuttles." Proceedings of the National Academy of Sciences of the United States of America, 115(39): 9672-9677, September 2018. <DOI: 10.1073/pnas.1805029115>
Tan, A.J., Huang, M., Avci, C.O., Büttner, F., Mann, M., Hu, W., Mazzoli, C., Wilkins, S., Tuller, H.L., and Beach, G.S.D. "Magneto-ionic control of magnetism using a solid-state proton pump." Nature Materials, November 2018. <DOI: 10.1038/s41563-018-0211-5>
Chi, Y.T., Youssef, M., Sun, L.X., Van Vliet, K.J., and Yildiz, B. "Accessible switching of electronic defect type in SrTiO3 via biaxial strain." Physical Review Materials, 2(5): Article 055801, May 2018. <DOI: 10.1103/PhysRevMaterials.2.055801>
Tang, A.S., Onbasli, M.C., Sun, X.Y., Ross, C.A. "Thickness-dependent double-epitaxial growth in strained SrTi0.7Co0.3O3−δ films." ACS Applied Materials & Interfaces, 10(8): 7469-7475, February 2018. <DOI: 10.1021/acsami.7b18808>
Lu, Q.Y., Vardar, G., Jansen, M., Bishop, S.R., Waluyo, I., Tuller, H.L., and Yildiz, B. "Surface defect chemistry and electronic structure of Pr0.1Ce0.9O2-δ revealed in operando." Chemistry of Materials, 30(8): 2600-2606, April 2018. <DOI: 10.1021/acs.chemmater.7b05129>
Chi, Y.T., Youssef, M., Sun, L.X., Van Vliet, K.J., and Yildiz, B. "Accessible switching of electronic defect type in SrTiO3 via biaxial strain." Physical Review Materials, 2(5): Article 055801, May 2018. <DOI: 10.1103/PhysRevMaterials.2.055801>
Tang, A.S., Onbasli, M.C., Sun, X.Y., and Ross, C.A. "Thickness-dependent double-epitaxial growth in strained SrTi0.7Co0.3O3- δ films." ACS Applied materials & Interfaces, 10(8): 7469-7475, February 2018. <DOI: 10.1021/acsami.7b18808>
Lu, Q.Y., Bishop, S.R., Lee, D., Lee, S., Bluhm, H., Tuller, H.L. Lee, H.N., and Yildiz, B. "Electrochemically Triggered Metal-Insulator Transition between VO2 and V2O5." Advanced Functional Materials, 28(34): Article 1803024, August 2018. <DOI: 10.1002/adfm.201803024>
McGrogan, F.P., Raja, S.N., Chiang, Y.M., Van Vliet, K.J. "Electrochemomechanical Fatigue: Decoupling Mechanisms of Fracture- Induced Performance Degradation in LiXMn2O4." Journal of the Electrochemical Society, 165(11): A2458-A2466, August 2018. <DOI: 10.1149/2.0191811jes>
Piskin, F., Bliem, R., and Yildiz, B. "Effect of crystal orientation on the segregation of aliovalent dopants at the surface of La0.6Sr0.4CoO3" Journal of Materials Chemistry A, 6(29): 14136-14145, August, 2018. <DOI: 10.1039/c8ta01293h>
2017
Adepalli, K.K., Yang, J., Maier, J., Tuller, H.L., and Yildiz, B. “Tunable Oxygen Diffusion and Electronic Conduction in SrTiO3 by Dislocation-Induced Space Charge Fields.” Advanced Functional Materials, 27(22): Article 1700243, June 2017. DOI: 10.1002/adfm.201700243
Barbosa, M.S., Suman, P.H., Kim, J.J., Tuller, H.L., Varela, J.A., and Orlandi, M.O. “Gas sensor properties of Ag- and Pd-decorated SnO micro-disks to NO2, H2 and CO: Catalyst enhanced sensor response and selectivity.” Sensors and Actuators B-Chemical, 239: 253-261, February 2017. DOI: 10.1016/j.snb.2016.07.157
Goto, T., Kim, D.H., Sun, X.Y., Onbasli, M.C., Florez, J.M., Ong, S.P., Vargas, P., Ackland, K., Stamenov, P., Aimon, N.M., Inoue, M., Tuller, H.L., Dionne, G.F., Coey, J.M.D., and Ross, C.A. “Magnetism and Faraday Rotation in oxygen-deficient polycrystalline and single-crystal iron-substituted strontium titanate.” Physical Review Applied, 7(2): Article 024006, February 2017. DOI: 10.1103/PhysRevApplied.7.024006
Huang, M., Tan, Aik J., Mann, M., Bauer, U., Ouedraogo, R., and Beach, G.S.D. “Three-terminal resistive switch based on metal/metal oxide redox reactions.” Scientific Reports, 7: Article 7452, August 2017. DOI: 10.1038/s41598-017-06954-x
Youssef, M., Van Vliet, K.J., and Yildiz, B. “Polarizing oxygen vacancies in insulating metal oxides under a high electric field.” Physical Review Letters, 119(12): Article 126002, September 2017. DOI: 10.1103/PhysRevLett.119.126002
Youssef, M., Yildiz, B., and Van Vliet, K.J. “Thermomechanical stabilization of electron small polarons in SrTiO3 assessed by the quasiharmonic approximation.” Physical Review B, 95(16): Article 161110, April 2017. DOI: 10.1103/PhysRevB.95.161110
2016
Moors, M., Adepalli, K.K., Lu, Q.Y., Wedig, A., Baumer, C., Skaja, K., Arndt, B., Tuller, H.L., Dittmann, R., Waser, R., Yildiz, B., and Valov, I. “Resistive switching mechanisms on TaOx and SrRuO3 thin-film surfaces probed by scanning tunneling microscopy.” ACS Nano, 10(1): 1481-1492, January 2016. DOI: 10.1021/acsnano.5b07020
Lu, Q.Y., Chen, Y., Bluhm, H., and Yildiz, B. “Electronic structure evolution of SrCoOx during electrochemically driven phase transition probed by in situ x-ray spectroscopy.” Journal of Physical Chemistry C, 120(42): 24148-24157, October 2016. DOI: 10.1021/acs.jpcc.6b07544
Chen, Y., Ojha, S., Tsvetkov, N., Kim, D.H., Yildiz, B., and Ross, C.A. “Spinel/perovskite cobaltite nanocomposites synthesized by combinatorial pulsed laser deposition.” Crystengcomm, 18(40): 7745-7752, 2016. DOI: 10.1039/c6ce01445c
Choi, S.-J., Chattopadhyay, S., Kim, J.J., Kim, S.-J., Tuller, H.L., Rutledge, G.C., and Kim, I.D. “Coaxial electrospinning of WO3 nanotubes functionalized with bio-inspired Pd catalysts and their superior hydrogen sensing performance.” Nanoscale, 8(17): 9159-9166, 2016. DOI: 10.1039/c5nr06611e
Choi, S.J., Kim, S.J., Cho, H.J., Jang, J.S., Lin, Y.M., Tuller, H.L., Rutledge, G.C., and Kim, I.D. “WO3 nanofiber-based biomarker detectors enabled by protein-encapsulated catalyst self-assembled on polystyrene colloid templates.” Small, 12(7): 911-920, February 2016. DOI: 10.1002/smll.201502905
Khalil, A., Kim, J.J., Tuller, H.L., Rutledge, G.C., and Hashaikeh, R. “Gas sensing behavior of electrospun nickel oxide nanofibers: Effect of morphology and microstructure.” Sensors and Actuators B-Chemical, 227: 54-64, May 2016. DOI: 10.1016/j.snb.2015.12.012
Kim, S.J., Choi, S.J., Jang, J.S., Kim, N.H., Hakim, M., Tuller, H.L., and Kim, I.D. “Mesoporous WO3 nanofibers with protein-templated nanoscale catalysts for detection of trace biomarkers in exhaled breath.” ACS Nano, 10(6): 5891-5899, June 2016. DOI: 10.1021/acsnano.6b01196
Koo, W.T., Choi, S.J., Kim, S.J., Jang, J.S., Tuller, H.L., and Kim, I.D. “Heterogeneous sensitization of metal-organic framework driven metal@metal oxide complex catalysts on an oxide nanofiber scaffold toward superior gas sensors.” Journal of the American Chemical Society, 138(40): 13431-13437, October 2016. DOI: 10.1021/jacs.6b09167
Santiso, J., Roqueta, J., Bagues, N., Frontera, C., Konstantinovic, Z., Lu, Q.Y., Yildiz, B., Martinez, B., Pomar, A., Balcells, L., and Sandiumenge, F. “Self-arranged misfit dislocation network formation upon strain release in La0.7Sr0.3MnO3/LaAlO3(100) epitaxial films under compressive strain.” ACS Applied Materials & Interfaces, 8(26): 16823-16832, July 2016. DOI: 10.1021/acsami.6b02896
Tsvetkov, N., Lu, Q.Y., Sun, L.X., Crumlin, E.J., and Yildiz, B. “Improved chemical and electrochemical stability of perovskite oxides with less reducible cations at the surface.” Nature Materials, 15(9): 1010-1016, September 2016. DOI: 10.1038/NMAT4659
2015
Wedig, A., Luebben, M., Cho, D.-Y., Moors, M., Skaja, K., Rana, V., Hasegawa, T., Adepalli, K., Yildiz, B., Waser, R. and Valov, I. “Nanoscale cation motion in TaOx, HfOx, and TiOx memristive systems.” Nature Nanotechnology, 10(9): 729-824, September 2015. DOI: 10.1038/NNANO.2015.221
Lu, Q. and Yildiz, B. “Voltage-Controlled Topotactic Phase Transition in Thin-Film SrCoOx Monitored by In Situ X‐ray Diffraction.” Nano Letters, 16: 1186−1193, December 2015. DOI: 10.1021/acs.nanolett.5b04492
Wedig, A., Luebben, M., Cho, D.-Y., Moors, M., Skaja, K., Rana, V., Hasegawa, T., Adepalli, K., Yildiz, B., Waser, R. and Valov, I. “Nanoscale cation motion in TaOx, HfOx, and TiOx memristive systems.” Nature Nanotechnology, 10(9): 729-824, September 2015. DOI: 10.1038/NNANO.2015.221