IRG1 combines expertise in materials theory and simulation, materials synthesis, and physical property characterization to predict, discover, and characterize new ferroics with unprecedented properties based on layered oxides.
Venkatraman Gopalan
Nasim Alem (Electron Microscopy)
Long-Qing Chen (Phase-field modeling)
Roman Engel-Herbert (Molecular Beam Epitaxy)
Craig Fennie (First Principles Theory)
Venkatraman Gopalan (Properties)
Tom Mallouk (Topochemical Synthesis)
Xiaoqing Pan (Electron Microscopy)
Karin Rabe (First Principles Theory)
Ramamoorthy Ramesh (Synthesis, Properties)
James Rondinelli (First Principles Theory)
Darrell Schlom (Molecular Beam Epitaxy)
Susan Trolier-McKinstry (Structure, Properties)
IRG1, Designing Functionality into Layered Ferroics, will showcase materials discovery by design for electric field control of electronic, optical, magnetic and structural response of materials starting from the level of atoms. The goal is to design and discover fundamental new mechanisms and material classes of acentric layered oxides with strong coupling to spin, charge, and lattice degrees of freedom. An unprecedented expansion of ferroic families in layered oxides – a vast and largely unexplored materials class with unique control knobs in chemistry, topology, and geometry – will enable the design of ferro- & ferri-electricity, magnetoelectricity, multiferroicity, and gradient-driven effects. We will counterpoise competing phases with colossal properties to transform otherwise nonpolar materials into strongly polar ones and will couple electrical, magnetic and structural order parameters. Group theory, materials informatics, first-principles DFT, model Hamiltonians, and phase-field modeling will predict new ferroic systems and guide experimental efforts. Potential new technologies include room temperature electric field control of ferromagnetism, highly nonlinear optical materials, high temperature piezoelectrics, GHz electronics, and electric field control of correlated phenomena.
(1) T. T.A. Lummen, Yijia Gu, Jianjun Wang, Shiming Lei, Amit Kumar, Andrew T. Barnes, Eftihia Barnes, Sava Denev, Alex Belianinov, Martin Holt, Anna N. Morozovska, Sergei V. Kalinin, Long-Qing Chen and Venkatraman Gopalan, “Thermotropic phase boundaries in classic ferroelectrics,” Nat. Commun. 5, 3172 (2014).
(2) H. Akamatsu, K. Fujita, T. Kuge, A. S. Gupta, A. Togo, S. Lei, F. Xue, G. Stone, J. M. Rondinelli, L. Q. Chen, I. Tanaka, V. Gopalan, K. Tanaka, “Inversion symmetry breaking by oxygen octahedral rotations in Ruddlesden-Popper NaRETiO4 family” Phys. Rev. Lett. 112, 187602 (2014).
(3) C-H.Lee, N. D. Orloff, T. Birol, Y. Zhu, V. Goian, R. Haislmaier, E. Vlahos, J. A. Mundy, Y. Nie, M. D. Biegalski, J. Zhang, M. Bernhagen, N. A. Benedek, Y. Kim, J. D. Brock, R. Uecker, X. Xi, V. Gopalan, D. Nuzhnyy, S. Kamba, D. A. Muller, I. Takeuchi, J. C. Booth, C. J. Fennie & D. G. Schlom, "Exploiting Dimensionality and Defect Mitigation to Create Tunable Microwave Dielectrics," Nature, doi:10.1038/nature12582 (published on-line on October 16, 2013) (2013).
(4) The six main mechanisms are: (a) Spin spirals and exchange-striction: T. Kimura, "Spiral Magnets as Magnetoelectrics", Annu. Rev. Mater. Res. 37, 387-413 (2007); I. Sergienko, C. Sen, and E. Dagotto, "Ferroelectricity in the Magnetic E-Phase of Orthorhombic Perovskites", Phys. Rev. Lett. 97, 227204 (2006); (b) Charge ordered multiferroics: N. Ikeda, H. Ohsumi, K. Ohwada, K. Ishii, T. Inami, K. Karurai, Y. Murakami, K. Yoshii, S. Mori, Y. Horibe, and H. Kito, "Ferroelectricity from iron valence ordering in the charge-frustrated system LuFe2O4", Nature 436, 1136 (2005); H. J. Xiang, M.-H.Whangbo, "Charge ordering and the origin of giant magnetocapacitance in LuFe2O4", Phys. Rev. Lett. 98, 246403 (2007); (c) Spin-phonon coupling: C. J. Fennie and K. M. Rabe, "Magnetic and electric phase control in epitaxial EuTiO3 from first principles", Phys. Rev. Lett. 97 267602 (2007); J. H. Lee, L. Fang, E. Vlahos, X. Ke, Y. W. Jung, L. Fitting Kourkoutis, J.-W. Kim, P. J. Ryan, T. Heeg, M. Roeckerath, V. Goian, M. Bernhagen, R. Uecker, P. C. Hammel, K. M. Rabe, S. Kamba, J. Schubert, J. W. Freeland, D. A. Muller, C. J. Fennie, P. Schiffer, V. Gopalan, E. Johnston-Halperin, and D. G. Schlom, "A Strong Ferroelectric Ferromagnet Created by means of Spin-Lattice Coupling", Nature 466, 954 (2010); (d) A-site ferroelectricity, B-site magnetism: N. A. Hill (Spaldin), "Why are there so few magnetic ferroelectrics", J. Phys. Chem. B 104, 6694 (2000); J. Wang, J. B. Neaton, H. Zheng, V. Nagaraj, S. B. Ogale, B. Liu, D. Viehland, V. Vaidyanathan, D. G. Schlom, U. V. Waghmare, N. A. Spaldin, K. M. Rabe, M. Wuttig, and R. Ramesh, "Epitaxial BiFeO3 multiferroic thin film heterostructures", Science 299, 1719 (2003); (e) Coupled JT and DM interactions: C. J. Fennie, "Ferroelectrically induced weak-ferromagnetism by design", Phys. Rev. Lett. 100, 167203 (2008); (f) Hybrid Improper Multiferroics: N. A. Benedek and C. J. Fennie, "Hybrid Improper Ferroelectricity: A Mechanism for Controllable Polarization-Magnetization Coupling", Phys. Rev. Lett. 106, 107204 (2011).
(5) V. Gopalan, D. B. Litvin, "Rotation-reversal symmetries in crystals and handed structures," Nature Materials, 10, 376 (2011).
(6) A. N. Morozovska, E. A. Eliseev, M. D. Glinchuk, V. Gopalan, "Interfacial Polarization and pyroelectricity in antiferrodistortive structures induced by a flexoelectric effect and rotostriction," Phys. Rev. B, 85, 094107 (2012).
(7) T. Birol, N. A. Benedek, C. J. Fennie, "Interface control of emergent ferroic order in Ruddlesden-Popper Srn+1TinO3n+1," Phys. Rev. Lett., 107, 257602 (2011).
(8) R. L. Johnson-Wilke, D. S. Tinberg, C. B. Yeager, Y. Han, I. M. Reaney, I. Levin, D. D. Fong, T. T. Fister, S. Trolier-Mckinstry, "Tilt transitions in compressively strained AgTa0.5Nb0.5O3 thin films," Phys. Rev. B, 84, 134114 (2011).
(9) J.H. Lee, L. Fang, E. Vlahos, X. Ke, Y.W. Jung, L. Fitting Kourkoutis, J-W. Kim, P.J. Ryan, T. Heeg, M. Roeckerath, V. Goian, M. Bernhagen, R. Uecker, P.C. Hammel, K.M. Rabe, S. Kamba, J. Schubert, J.W. Freeland, D.A. Muller, C.J. Fennie, P. Schiffer, V. Gopalan, E. Johnston-Halperin, and D.G. Schlom, "A Strong Ferroelectric Ferromagnet Created by means of Spin-Lattice Coupling," Nature 466 (2010) 954-958.
(10) J.H. Lee, L. Fang, E. Vlahos, X. Ke, Y.W. Jung, L. Fitting Kourkoutis, J-W. Kim, P.J. Ryan, T. Heeg, M. Roeckerath, V. Goian, M. Bernhagen, R. Uecker, P.C. Hammel, K.M. Rabe, S. Kamba, J. Schubert, J.W. Freeland, D.A. Muller, C.J. Fennie, P. Schiffer, V. Gopalan, E. Johnston-Halperin, and D.G. Schlom, "A Strong Ferroelectric Ferromagnet Created by means of Spin-Lattice Coupling," Nature 466 (2010) 954-958.
(11) P.J. Ryan, J.-W. Kim, T. Birol, P. Thompson, J.-H. Lee, X. Ke, P.S. Normile, E. Karapetrova, P. Schiffer, S.D. Brown, C.J. Fennie, D.G. Schlom, "Reversible control of magnetic interactions by electric field in a single-phase material," Nature Communications, 4, DOI: 10.1038/ncomms2329, January (2013).
(12) Donghwa Lee Rakesh K. Behera, Pingping Wu, Haixuan Xu, Y. L. Li, Simon R. Phillpot, Susan B. Sinnott, L. Q. Chen, V. Gopalan, "Mixed Bloch-Neel-Ising Character of 180 Degree Ferroelectric Domain Walls," Phys. Rev. B. Rapid Communications, 80, 060102(R)(2009).
(13) A. Vasudevarao, A. N. Morozovska, I. Grinberg, S. Bhattacharya, Y. Li, S. Jesse, P. Wu, K. Seal, S. Choudhury, E.A. Eliseev, S. Svechnikov, D. Lee, S. Phillpot, L.Q. Chen, A. M. Rappe, V. Gopalan and S.V. Kalinin, "Correlated polarization switching in the proximity of a 180 degree domain wall," Phys. Rev. B. 82, 024111 (2010).
(14) C. T. Nelson, P. Gao, J. R. Jokisaari, C. Heikes, C. Adamo, A. Melville, S-H. Baek, C. M. Folkman, B. Winchester, Y. Gu, Y. Liu, K. Zhang, E. Wang, J. Li, L-Q. Chen, C-B. Eom, D. G. Schlom, X. Pan, "Domain dynamics during ferroelectric switching," Science, 334, 968-971 (2011).
(15) P. Gao, C. T. Nelson, J. R. Jokisaari, S-H. Baek, C. W. Bark, Y. Zhang, E. Wang, D. G. Schlom, C-B. Eom, X. Pan, "Revealing the role of defects in ferroelectric switching with atomic resolution," Nature Commun. 2, article number 591, doi: 110.1038/ ncomms 1600. (2011)
(16) Q. He, C.-H. Yeh, J.-C. Yang, G. Singh-Bhalla, C.-W. Liang, P.-W. Chiu, G. Catalan, L.W. Martin, Y.-H. Chu, J. F. Scott, and R. Ramesh, "Magnetotransport at domain walls in BiFeO3," Phys. Rev. Lett. 108, 067203 (2012).
(17)E. A. Eliseev, A. N. Morozovska, Y. Gu, A. Borisevich, L-Q. Chen, V. Gopalan, S. V. Kalinin, "Conductivity of twin walls-surface junctions in ferroelastics-Interplay of deformation potential, octahedral rotations, improper ferroelectricity, and flexoelectric coupling," Phys. Rev. B. 86, 085416 (2012).
(18) R.J. Zeches, M.D. Rossell, J.X. Zhang, A.J. Hatt, Q. He, C.-H. Yang, A. Kumar, C.H. Wang, A. Melville, C. Adamo, G. Sheng, Y.-H. Chu, J.F. Ihlefeld, R. Erni, C. Ederer, V. Gopalan, L.Q. Chen, D.G. Schlom, N.A. Spaldin, L.W. Martin, and R. Ramesh, "A Strain-Driven Morphotropic Phase Boundary in BiFeO3," Science 326, 977 (2009).
(19)J. C. Yang, Q. He, S. J. Suresha, C. Y. Kuo, R. Haislmaier, G. Sheng, C. Adamo, H. J. Liu, C. W. Liang, C. Y. Peng, H. J. Lin, Z. Hu, L. Chang, C. T. Chen, L. H. Tjeng, E. Arenholz, D. G. Schlom, V. Gopalan, L. Q. Chen, Y. H. Chu, and R. Ramesh, "Orthorhombic BiFeO3 Multiferroic Thin Films," Phys. Rev. Lett., 109, 247606 (2012).
(20) Y. Wang, C. Nelson, A. Melville, B. Winchester, S. L. Z. K. Liu, D. G. Schlom, X. Q. Pan, L.-Q. Chen. " BiFeO3 Domain Wall Energies and Structures: A Combined Experimental and Density Functional Theory plus U Study," Phys. Rev. Lett. 110, 267601 (2013).
(21) R. C. Haislmaier, N. J. Podraza, S. Denev, A. Melville, D. G. Schlom, V. Gopalan, "Large nonlinear optical coefficients in pseudo-tetragonal BiFeO3 thin films," Appl. Phys. Lett. 103, 031906 (2013).
(22) M. O. Ramirez, A. Kumar, S. Denev, N. Podraza, X. S. Xu, R. C. Rai, Y. H. Chu, J. Seidel, L. Martin, S-Y. Yang, E. Saiz, J. F. Ihlefeld, S. Lee, S. W. Cheong, D. G. Schlom, R. Ramesh, J. Orenstein, J. L. Musfeldt, and V. Gopalan, "Magnon Sidebands in Bismuth Ferrite Probed by Nonlinear Optical Spectroscopy," Phys. Rev. B. 76, 224106 (2009).
(23) H. W. Jang, A. Kumar, S. Denev, M. D. Biegalski, P. Maksymovych, C. T. Nelson, C. M. Folkman, S. H. Baek, N. Balke, D. G. Schlom, L. Q. Chen, X. Q. Pan, S. V. Kalinin, V. Gopalan, and C. B. Eom, "Ferroelectricity in strain-free SrTiO3 films," Phys. Rev. Lett. 104, 197601(2010).
(24) M.P. Warusawithana, C. Cen, C.R. Sleasman, J.C. Woicik, Y.L. Li, L. Fitting Kourkoutis, J.A. Klug, H. Li, P. Ryan, L-P. Wang, M. Bedzyk, D.A. Muller, L.Q. Chen, J. Levy, and D.G. Schlom, "A Ferroelectric Oxide Made Directly on Silicon," Science 324 (2009) 367-370.
(25) S. Denev, A. Kumar, M. Biegalski, H. W. Wang, C. M. Folkman, A. Vasudevarao, Y. Han, I. M. Reaney, S. T. Mckinstry, C. B.- Eom, D. G. Schlom, V. Gopalan, "Magnetic color symmetry of lattice rotations in a diamagnetic material," Phys. Rev. Lett., 100, 257601-1/4 (2008).
(26) C.-J. Eklund, C. J. Fennie, and K. M. Rabe, "Strain-induced ferroelectricity in orthorhombic CaTiO3 from first principles," Phys. Rev. B 79, 220101 (2009).
(27) J. M. Hu, Z. Li, L. Q. Chen, C. W. Nan, "Design of a voltage-controlled magnetic random access memory based on anisotropic magnetoresistance in a single magnetic layer," Advanced Materials, 24, 2869-2873 (2012).
(28) P. Gao, C. T. Nelson, J. R. Jokisaari, Y. Zhang, S. H. Baek, C. W. Bark, E. Wang, Y. M. Liu, J. Y. Li, C. B. Eom, X. Q. Pan, "Direct observations of retention failure in ferroelectric memories," Advanced Materials, 24, 1106-1110 (2012).
(29) Q. He, Y.-H. Chu, J. T. Heron, S. Y. Yang, W. I. Liang, C. Y. Kuo, H. J. Lin, P. Yu, C. W. Liang, R. J. Zeches, W. C. Kuo, J. Y. Juang, C. T. Chen, E. Arenholz, A. Scholl, R. Ramesh, "Electrically controllable spontaneous magnetism in nanoscale mixed phase multiferroics," Nature Commun. 2, 225 (2011).
(30) J.M. Hu, Z. L. Q. Chen, C. W. Nan, "High-density magnetoresistive random access memory operating at ultralow voltage at room temperature," Nature Commun. 2, 553 (2011).
(31) Q. He, Y.-H. Chu, J. T. Heron, S. Y. Yang, W. I. Liang, C. Y. Kuo, H. J. Lin, P. Yu, C. W. Liang, R. J. Zeches, W. C. Kuo, J. Y. Juang, C. T. Chen, E. Arenholz, A. Scholl, R. Ramesh, "Electrically controllable spontaneous magnetism in nanoscale mixed phase multiferroics," Nature Commun. 2, 225 (2011).
(32) L. Palova, P. Chandra, K.M. Rabe, "Magnetostructural Effect in the multiferroic BiFeO3-BiMnO3 checkerboard from first principles," Phys. Rev. Lett. 104, 037202 (2010).