Publications

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2009
Seidel, J., L.W. Martin, Q. He, Q. Zhan, Y.-H. Chu, A. Rother, M.E. Hawkridge, P. Maksymovych, P. Yu, M. Gajek, N. Balke, S.V. Kalinin, S. Gemming, F. Wang, G. Catalan, J.F. Scott, N.A. Spaldin, J. Orenstein, and Ramamoorthy Ramesh. "Conduction at domain walls in oxide multiferroics." Nature Materials 8 (2009) 229-234.
Yang, C.-H., J. Seidel, S.Y. Kim, P.B. Rossen, P. Yu, M. Gajek, Y.H. Chu, L.W. Martin, M.B. Holcomb, Q. He, P. Maksymovych, N. Balke, S.V. Kalinin, A.P. Baddorf, S.R. Basu, M.L. Scullin, and Ramamoorthy Ramesh. "Electric modulation of conduction in multiferroic Ca-doped BiFeO 3 films." Nature Materials 8 (2009) 485-493.
Chu, Y.-H., Q. He, C.-H. Yang, P. Yu, L.W. Martin, P. Shafer, and Ramamoorthy Ramesh. "Nanoscale control of domain architectures in BiFeO 3 thin films." Nano Letters 9 (2009) 1726-1730.
Huang, C.W., L. Chen, J. Wang, Q. He, S.Y. Yang, Y.H. Chu, and Ramamoorthy Ramesh. "Phenomenological analysis of domain width in rhombohedral BiFeO3 films." Physical Review B - Condensed Matter and Materials Physics 80 (2009).
Zeches, R.J., 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. Schldin, N.A. Spaldin, L.W. Martin, and Ramamoorthy Ramesh. "A strain-driven morphotropic phase boundary in bifeO3." Science 326 (2009) 977-980.
2010
Seidel, J., P. Maksymovych, Y. Batra, A. Katan, S.-Y. Yang, Q. He, A.P. Baddorf, S.V. Kalinin, C.-H. Yang, J.-C. Yang, Y.-H. Chu, E.K.H. Salje, H. Wormeester, M. Salmeron, and Ramamoorthy Ramesh. "Domain wall conductivity in La-doped BiFeO3." Physical Review Letters 105 (2010).
Baek, S.H., H.W. Jang, C.M. Folkman, Y.L. Li, B. Winchester, J.X. Zhang, Q. He, Y.H. Chu, C.T. Nelson, M.S. Rzchowski, X.Q. Pan, Ramamoorthy Ramesh, L.Q. Chen, and C.B. Eom. "Ferroelastic switching for nanoscale non-volatile magnetoelectric devices." Nature Materials 9 (2010) 309-314.
Yu, P., J.-S. Lee, S. Okamoto, M.D. Rossell, M. Huijben, C.-H. Yang, Q. He, J.X. Zhang, S.Y. Yang, M.J. Lee, Q.M. Ramasse, R. Erni, Y.-H. Chu, D.A. Arena, C.-C. Kao, L.W. Martin, and Ramamoorthy Ramesh. "Interface ferromagnetism and orbital reconstruction in BiFeO 3-La0.7Sr0.3MnO3 heterostructures." Physical Review Letters 105 (2010).
Arenholz, E., G. Van Der Laan, A. Fraile-Rodríguez, P. Yu, Q. He, and Ramamoorthy Ramesh. "Probing ferroelectricity in PbZr0.2 Ti0.8 O 3 with polarized soft x rays." Physical Review B - Condensed Matter and Materials Physics 82 (2010).
Holcomb, M.B., L.W. Martin, A. Scholl, Q. He, P. Yu, C.-H. Yang, S.Y. Yang, P.-A. Glans, M. Valvidares, M. Huijben, J.B. Kortright, J. Guo, Y.-H. Chu, and Ramamoorthy Ramesh. "Probing the evolution of antiferromagnetism in multiferroics." Physical Review B - Condensed Matter and Materials Physics 81 (2010).
Huang, C.W., Y.H. Chu, Z.H. Chen, J. Wang, T. Sritharan, Q. He, Ramamoorthy Ramesh, and L. Chen. "Strain-driven phase transitions and associated dielectric/piezoelectric anomalies in BiFeO3 thin films." Applied Physics Letters 97 (2010).
2011
Chiu, Y.-P., Y.-T. Chen, B.-C. Huang, M.-C. Shih, J.-C. Yang, Q. He, C.-W. Liang, J. Seidel, Y.-C. Chen, Ramamoorthy Ramesh, and Y.-H. Chu. "Atomic-scale evolution of local electronic structure across multiferroic domain walls." Advanced Materials 23 (2011) 1530-1534.
Ko, K.-T., M.H. Jung, Q. He, J.H. Lee, C.S. Woo, K. Chu, J. Seidel, B.-G. Jeon, Y.S. Oh, K.H. Kim, W.-I. Liang, H.-J. Chen, Y.-H. Chu, Y.H. Jeong, Ramamoorthy Ramesh, J.-H. Park, and C.-H. Yang. "Concurrent transition of ferroelectric and magnetic ordering near room temperature." Nature Communications 2 (2011).
Wu, C.-L., P.-W. Lee, Y.-C. Chen, L.-Y. Chang, C.-H. Chen, C.-W. Liang, P. Yu, Q. He, Ramamoorthy Ramesh, and Y.-H. Chu. "Direct spectroscopic evidence of charge reversal at the Pb(Zr 0.2Ti0.8)O3/La0.7Sr 0.3MnO3 heterointerface." Physical Review B - Condensed Matter and Materials Physics 83 (2011).
He, Q., 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, and Ramamoorthy Ramesh. "Electrically controllable spontaneous magnetism in nanoscale mixed phase multiferroics." Nature Communications 2 (2011).
Heron, J.T., M. Trassin, K. Ashraf, M. Gajek, Q. He, S.Y. Yang, Y.-H. Chu, S. Salahuddin, and Ramamoorthy Ramesh. "Electric-field-induced magnetization reversal in a ferromagnet-multiferroic heterostructure." Physical Review Letters 107 (2011).
Zhang, J.X., B. Xiang, Q. He, J. Seidel, R.J. Zeches, P. Yu, S.Y. Yang, C.H. Wang, Y.-H. Chu, L.W. Martin, A.M. Minor, and Ramamoorthy Ramesh. "Large field-induced strains in a lead-free piezoelectric material." Nature Nanotechnology 6 (2011) 98-102.
Zhang, J.X., Q. He, M. Trassin, W. Luo, D. Yi, M.D. Rossell, P. Yu, L. You, C.H. Wang, C.Y. Kuo, J.T. Heron, Z. Hu, R.J. Zeches, H.J. Lin, A. Tanaka, C.T. Chen, L.H. Tjeng, Y.-H. Chu, and Ramamoorthy Ramesh. "Microscopic origin of the giant ferroelectric polarization in tetragonal-like BiFeO3." Physical Review Letters 107 (2011).

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