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Publications
2014

T. Trong, J. Karthik, R. V. K. Mangalam, L. W. Martin, D. G. Cahill, Suppression of the electric-field induced entropy change in ferroelectric layers by an elastocaloric effect, under review Feb. 2014.
J. C. Agar, R. V. K. Mangalam, A. R. Damodaran, G. Velarde, J. Karthik, Z. H. Chen, N. Balke, S. V. Kalinin, L. W. Martin, Tuning susceptibility via misfit strain in relaxed morphotropic phase boundary PbZr1-xTixO3 epitaxial thin films, under review Feb. 2014.
M. Kozina, T. Hu, J. S. Wittenberg, E. Szilagyi, M. Trigo, T. A. Miller, C. Uher, A. R. Damodaran, L. W. Martin, A. Mehta, J. Corbett, J. Safranek, D. A. Reis, A. M. Lindenberg, Measurement of part-per-million lattice strains with 15 picosecond time-resolution using high-repetition rate synchrotron x-ray scattering, under review Feb. 2014.
S. L. Gleason, T. Byrum, Y. Gim, A. Thaler, P. Abbamonte, G. J. MacDougall, L. W. Martin, H. D. Zhou, S. L. Cooper, Magnon spectra and strong spin-lattice coupling in magnetically frustrated MnB2O4 (B = Mn, V): inelastic light scattering studies, under review Feb. 2014.
J. C. T. Lee, A. R. Damodaran, R. Ramesh, L. W. Martin, P. Abbamonte, X-ray diffraction studies of strain due to stripe-like ferroelectric domains in thin films of BiFeO3, under review Feb. 2014.
A. R. Damodaran, E. Breckenfeld, Z. H. Chen, S. Lee, L. W. Martin, Enhancement of ferroelectic Curie temperature in BaTiO3 films via strain-induced defect-dipole alignment, under review Feb. 2014.
R. Xu, S. Liu, J. Karthik, A. R. Damodaran, I. Grinberg, A. M. Rappe, L. W. Martin, Multi-step 90° switching mediated domain reversal in PbZr0.2Ti0.8O3 thin films, under review Feb. 2014.
B. Apgar, L. W. Martin, Understanding the competition between epitaxial strain and thermodynamics in TiO2: structural, morphological, and property evolution, under review Feb. 2014.
B. Bhatia, H. Cho, J. Karthik, J. Choi, D. G. Cahill, L. W. Martin, W. P. King, High power density pyroelectric energy conversion from BaTiO3 thin films, under reivew Feb. 2014.
S. R. Spurgeon, J. D. Sloppy, C. R. Winkler, M. Jablonski, D. Kepaptsoglou, P. Balachandran, S. Nejati, J. Karthik, A. R. Damodaran, C. L. Johnson, H. Ambaye, R. Goyette, V. Lauter, Q. Ramasse, J. C. Idrobo, K. S. Lau, S. E. Lofland, J. Rondinelli, L. W. Martin, M. L. Taheri, Thickness-dependent crossover from charge- to strain-mediated magnetoelectric coupling in ferromagnetic/piezoelectric oxide heterostructures, ACS Nano 8, 894 (2014).
R. Xu, J. Karthik, A. R. Damodaran, L. W. Martin, Domain wall contribution to enhanced ferroelectric susceptibilities, Nature Commun. 5, 3120 (2014).

2013

R. V. K. Mangalam, J. C. Agar, A. R. Damodaran, J. Karthik, L. W. Martin, Improved pyroelectric figures of merit in compositionally graded PbZr1-xTixO3 thin films, ACS Appl. Mater. Interfaces 5, 13235 (2013).
J. Rondinelli, N. A. Benedek, D. E. Freedman, A. Kavner, E. E. Rodriguez, E. S. Torberer, L. W. Martin, Accelerating functional materials discovery: insights from geological sciences, data-driven approaches, and computational advances, Amer. Ceram. Soc. Bull. 91, 14 (2013).
B. A. Apgar, S. Lee, L. Schroeder, L. W. Martin, Enhanced photoelectrochemical activity in all-oxide heterojunction devices based on correlated “metallic” oxides, Adv. Mater. 25, 6201 (2013).
E. Breckenfeld, A. B. Shah, L. W. Martin, Strain evolution in non-stoichiometric heteroepitaxial thin-film perovskites, J. Mater. Chem. C 1, 8052 (2013).
M. Huijben, P. Yu, L. W. Martin, H. J. A. Molegraaf, Y.-H. Chu, M. B. Holcomb, N. Balke, R. Ramesh, G. Rijnders, Ultrathin limit of exchange bias coupling at oxide multiferroic/ferromagnetic interfaces, Adv. Mater. 25, 4739 (2013).
E. Breckenfeld, R. Wilson, D. G. Cahill, L. W. Martin, Growth, stoichiometry, and thermal and dielectric properties of LaAlO3 thin films, Appl. Phys. Lett. 103, 082901 (2013).
S. Lee, B. Apgar, L. W. Martin, Strong visible-light absorption and hot-carrier injection in TiO2S/SrRuO3 heterostructures, Adv. Energy Mater. 3, 1084 (2013).
P. C. Fletcher, V. K. R. Mangalam, L. W. Martin, W. P. King, Pyroelectric electron emission from nanometer-thick films of PbZrxTi1-xO3, Appl. Phys. Lett. 102, 192908 (2013).
E. Breckenfeld, N. Bronn, J. Karthik, A. R. Damodaran, S. Lee, N. Mason, L. W. Martin, Effect of growth induced (non)stoichiometry on the structure and interfacial conductivity of LaAlO3/SrTiO3,  Phys. Rev. Lett. 110, 196804 (2013). 
C. Baeumer, S. P. Rogers, R. Xu, L. W. Martin, M. Shim, Tunable carrier type and density in graphene/PbZr0.2Ti0.8O3 hybrid structures through ferroelectric switching, Nano Lett. 13, 1693 (2013).
R. V. K. Mangalam, J. Karthik, A. R. Damodaran, J. C. Agar, L. W. Martin, Unexpected crystal and domain structure and properties in compositionally graded PbZr1-xTixO3 thin films, Adv. Mater. 25, 1761 (2013).
P. C. Fletcher, V. K. R. Mangalam, L. W. Martin, W. P. King, Field emission from nanometer-scale tips of crystalline PbZrxTi1-xO3, J. Vac. Sci. Technol. B 31, 021805 (2013).
Karthik, R. V. K. Mangalam, J. C. Agar, L. W. Martin, Large built-in electric fields due to flexoelectricity in compositionally graded ferroelectric thin films, Phys. Rev. B 87, 024111 (2013).

2012

J. Karthik, J. C. Agar, A. R. Damodaran, L. W. Martin, Effect of 90o domain walls and thermal expansion mismatch on the pyroelectric properties of epitaxial PbZr0.2Ti0.8O3 thin films, Phys. Rev. Lett. 109, 257602 (2012).
R. B. Wilson, B. A. Apgar, L. W. Martin, D. G. Cahill, Thermoreflectance of metal transducers for optical pump-probe studies of thermal properties, Optics Express 20, 28829 (2012).
B. Bhatia, J. Karthik, T. Tong, D. G. Cahill, L. W. Martin, W. P. King, Pyroelectric current measurements on PbZr0.2Ti0.8O3 epitaxial layers, J. Appl. Phys. 112, 104106 (2012).
C. R. Winkler, A. R. Damodaran, J. Karthik, L. W. Martin, M. L. Taheri, Direct observation of ferroelectric domain switching in varying electric field regimes using in situ TEM, Micron 43, 1121-1126 (2012).
L. W. Martin, D. G. Schlom, Advanced synthesis techniques and routes to new multiferroics [Invited review], Current Opin. Solid State Mater. Sci. 16, 199 (2012).
C. R. Winkler, M. L. Jablonski, M. L. Taheri, A. R. Damodaran, J. Karthik, L. W. Martin, Accessing intermediate ferroelectric switching regimes with time-resolved TEM, J. Appl. Phys. 112, 052013 (2012).
R. Jackson, P. C. Fletcher, J. Karthik, A. R. Damodaran, J. N. Emmerich, H. Teng, W. P. King, L. W. Martin, Electrical and thermal characterization of a ferroelectric thin film with an electro-thermal nanoprobe, Rev. Sci. Instru. 83, 076105 (2012).
S. Polisetty, J. Zhou, J. Karthik, A. R. Damodaran, D. Chen, A. Scholl, L. W. Martin, M. Holcomb, Linear dichroism dependence on ferroelectric polarization, J. Phys. Condens. Matter 24, 245902  (2012). 
P. Yu, W. Luo, J. X. Zhang, M. D. Rossell, C.-H. Yang, G. Singh-Bhalla, S. Y. Yang, Q. He, Q. M. Ramasse, R. Erni, L. W. Martin, Y.-H. Chu, S. T. Pantelides, S. J. Pennycook, R. Ramesh, Interface control of bulk ferroelectric polarization, Proc. Nat. Acad. Sci. 109, 9710 (2012).
J. Karthik, A. R. Damodaran, L. W. Martin, Effect of 90o domain walls on the low-field permittivity of PbZr0.2Ti0.8O3 thin films, Phys. Rev. Lett. 108, 167601 (2012).
L. W. Martin, R. Ramesh, Multiferroic and magnetoelectric heterostructures [Invited review], Acta Mater. 60, 2449 (2012).
J. Karthik, A. R. Damodaran, L. W. Martin, Epitaxial ferroelectric heterostructures fabricated by selective area epitaxy of SrRuO3 using an MgO hard mask, Adv. Mater. 24, 1610 (2012).
A. R. Damodaran, E. Breckenfeld, A. K. Choquette, L. W. Martin, Stabilization of mixed-phase structures in highly-strained BiFeO3 thin films via chemical-alloying, Appl. Phys. Lett. 100, 082904 (2012).
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, R. Ramesh, Magnetotransport at domain walls in BiFeO3, Phys. Rev. Lett. 108, 067203 (2012). 
E. Breckenfeld, R. Wilson, J. Karthik, A. R. Damodaran, D. G. Cahill, L. W. Martin, Effect of growth induced (non)stoichiometry on the structure, dielectric response, and thermal conductivity of SrTiO3 thin films, Chem. Mater. 24, 331 (2012). 
A. R. Damodaran, S. Lee, J. Karthik, S. MacLaren, L. W. Martin, Temperature and thickness evolution and epitaxial breakdown in highly strained BiFeO3 thin films, Phys. Rev. B 85, 024113 (2012).

2011

B. Bhatia, J. Karthik, D. G. Cahill, L. W. Martin, W. P. King, High-temperature piezoresponse force microscopy, Appl. Phys. Lett. 99, 173103 (2011).
M. Chi, J. P. Bradley, N. D. Browning, T. Mizoguchi, L. W. Martin, R. Ramesh, H. Ikeno, I. Tanaka, Atomic and electronic structures of SrVO3-LaAlO3 interfaces, J. Appl. Phys. 110, 046104 (2011).
J. Karthik, L. W. Martin, Effect of domain walls on the electrocaloric properties of Pb(Zr1-xTix)O3 thin films, Appl. Phys. Lett. 99, 032904 (2011). 
J. Karthik, L. W. Martin, Evolution of pyroelectric properties in polydomain Pb(Zr1-x, Tix)O3 thin films, Phys. Rev B 84, 024102 (2011).
D.-W. Oh, J. Ravichandran, C.-W. Liang, W. Siemons, B. Jalan, C. M. Brooks, M. Huijben, D. G. Schlom, S. Stemmer, L. W. Martin, et al., Thermal conductivity as a metric for the crystalline quality of SrTiO3 epitaxial layers, Appl. Phys. Lett. 98, 221904 (2011).
A. R. Damodaran, C.-W. Liang, Q. He, C.-Y. Peng, L. Chang, Y.-H. Chu, L. W. Martin, Nanoscale structure and mechanism for enhanced electromechanical response of highly-strained BiFeO3 thin films, Adv. Mater. 23, 3170 (2011). 
L. W. Martin, Exciting new insight into the prototype complex oxide heterointerface: LaAlO3/SrTiO3, Surf. Sci. 605, 1388 (2011).
S. Lee, C.-W. Liang, L. W. Martin, Epitaxial control of Cu2O nanostructures via pulsed laser deposition, ACS Nano 5, 3736 (2011).
S. C. Kehr, Y. Liu, L. W. Martin, et al., Near-field examination of perovskite-based superlenses and superlens-enhanced probe-object coupling, Nature Commun. 2, 249 (2011).
J. X. Zhang, B. Xiang, J. Seidel, R. J. Zeches, P. Yu, S. Y. Yang, C. H. Yang, Y.-H. Chu, L. W. Martin, et al., Large field-induced strains in a lead-free piezoelectric material, Nature Nanotechnol. 6, 98 (2011).

2010

L. W. Martin, Engineering functionality in multiferroic BiFeO3 - Controlling chemistry to enable advanced applications, Dalton Trans. 39, 10813 (2010).
N. Balke, M. Gajek, A. K. Tagantsev, L. W. Martin, et al., Direct observation of capacitor switching using planar electrodes, Adv. Funct. Mater. 20, 3466 (2010).
M. C. Langner, C. L. S. Kantner, Y.-H. Chu, L. W. Martin, et al., Effective thermal boundary resistance from thermal decoupling of magnons and phonons in SrRuO3 thin films, Phys. Rev. B 82, 054425 (2010).
P. Yu, 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, R. Ramesh, Interface ferromagnetism and orbital reconstruction in BiFeO3-La0.7Sr0.3MnO3 heterostructures, Phys. Rev. Lett. 105, 027201 (2010).
L. W. Martin, et al., Advances in the growth and characterization of magnetic, ferroelectric, and multiferroic oxide thin films (Invited review), Mater. Sci. Eng. R-Rep 68, 89 (2010).
D. Pantel, Y.-H. Chu, L. W. Martin, et al., Switching kinetics in epitaxial BiFeO3 thin films, Appl. Phys. Lett. 107, 084111 (2010).
M.B. Holcomb, L.W. Martin, et al., Probing the evolution of antiferromagnetism in multiferroics, Phys. Rev. B 81, 134406 (2010).
S. Y. Yang, J. Seidel, S. J. Byrnes, P. Shafer, C.-H. Yang, M. D. Rossell, J. W. Ager III, L. W. Martin, R. Ramesh, Above-bandgap voltages from ferroelectric photovoltaic devices, Nature Nanotechnol. 5, 143 (2010).

2009

R. J. Zeches, M. D. Rossell, J. X. Zhang, A. J. Hatt, Q. He, C. H. Yang, A. Kumar, C. H. Wang, A. Melville, Y.-H. Chu, J. F. Ihlefeld, R. Erni, C. Ederer, V. Gopalan, L. Q. Chen, D. G. Schlom, N. A. Spaldin, L. W. Martin, R. Ramesh, A strain-driven morphotropic phase boundary in BiFeO3, Science 326, 977 (2009). 
S.-Y. Yang,* L. W. Martin,* et al., Photovoltaic effects in BiFeO3 thin films, Appl. Phys. Lett. 95, 062909 (2009).
J. Zhang, M. Rutkowski, L. W. Martin, et al., Surface, bulk, and interface electronic states of epitaxial BiFeO3 films, J. Vac. Sci. Technol. B 27, 2012 (2009).
M. O. Ramirez, A. Kumar, S. A. Denev, N. J. Podraza, X. S. Xu, R. C. Rai, Y.-H. Chu, J. Seidel, L. W. Martin, et al., Magnon sidebands and spin-charge coupling in bismuth ferrite probed by nonlinear optical spectroscopy, Phys. Rev. B 79, 224106 (2009).
G. L. Yuan, L. W. Martin, et al., The dependence of oxygen vacancy distribution in BiFeO3 films on oxygen pressure and substrate, Appl. Phys. Lett. 95, 012904 (2009).
L. Pintilie, C. Dragoi, Y.-H. Chu, L. W. Martin, et al., Orientation-dependent potential barriers in the case of epitaxial Pt-BiFeO3-SrRuO3 capacitors, Appl. Phys. Lett. 95, 232902 (2009).
C.H. Yang, J. Seidel, S.-Y. Kim, P. Rossen, P. Yu, M. Gajek, Y.-H. Chu, L. W. Martin, et al., Electric modulation of conduction in multiferroic Ca-doped BiFeO3 films, Nature Mater. 8, 485 (2009).
M. C. Langner, C. L. S. Kantner, Y.-H. Chu, L. W. Martin, et al., Observation of ferromagnetic resonance in SrRuO3 by the time-resolved magneto-optical Kerr effect, Phys. Rev. Lett. 102, 177601 (2009).
X. S. Xu, T. V. Brinzari, S. Lee, Y.-H. Chu, L. W. Martin, et al., Optical properties and magnetochroism in multiferroic BiFeO3, Phys. Rev. B 79, 134425 (2009). 
M. O. Ramirez, A. Kumar, S. A. Denev, Y.-H. Chu, J. Seidel, L. W. Martin, et al., Spin-charge-lattice coupling through resonant multimagnon excitations in multiferroic BiFeO3, Appl. Phys. Lett. 94, 161905 (2009).
Y.-H. Chu, Q. He, C.-H. Yang, P. Yu, L. W. Martin, et al., Nanoscale control of domain architectures in BiFeO3 Thin Films, Nano Lett. 9, 1726 (2009).
J. Seidel*, L. W. Martin*, et al., Conducting ferroelectric domain walls in oxide multiferroics, Nature Mater. 8, 229 (2009).
L. W. Martin, Multiferroics, Invited chapter in McGraw-Hill 2009 Yearbook of Science and Technology, McGraw-Hill: Columbus (2009).

2008

L. W. Martin, et al., Multiferroics: Thin films and nanostructures, (Invited review paper) J. Phys. Condens. Matter 20, 434220 (2008).
M. Huijben, L.W. Martin, et al., Critical thickness and orbital ordering in ultrathin La0.7Sr0.3MnO3 films, Phys. Rev. B 78, 094413 (2008).
L. W. Martin, et al., Nanoscale control of exchange bias with BiFeO3 thin films, Nano Lett. 8, 2050 (2008).
A. Kumar, N. J. Podraza, S. Denev, J. Li, L. W. Martin, et al., Linear and nonlinear optical properties of multifunctional PbVO3 thin films, Appl. Phys. Lett. 92, 231915 (2008).
Y.-H. Chu*, L. W. Martin*, et al., Electric-field control of local ferromagnetism using a magnetoelectric multiferroic, Nature Mater. 7, 478 (2008).
A. Kumar, N. Podraza, S. Denev, M. Ramirez, Y.-H. Chu, L. W. Martin, et al., Linear and nonlinear optical properties of BiFeO3, Appl. Phys. Lett. 92, 121915 (2008).
Y.-H. Chu, Q. Zhan, C.-H. Yang, M. Cruz, L. W. Martin, et al., Low voltage performance of epitaxial BiFeO3 films on Si substrates through lanthanum-substitution, Appl. Phys. Lett. 92, 102909 (2008).
S. Basu, L. W. Martin, et al., Photoconductivity in BiFeO3 thin films, Appl. Phys. Lett. 92, 091905 (2008).

2007

L. W. Martin, et al., Room temperature exchange bias and spin valves based on BiFeO3/SrRuO3/SrTiO3/Si(001) heterostructures, Appl. Phys. Lett. 91, 172513 (2007).
Y.-H. Chu, M. P. Cruz, C.-H. Yang, L. W. Martin, et al., Domain control in multiferroic BiFeO3 through substrate vicinality, Adv. Mater. 19, 2662 (2007).
Y.-H. Chu, L. W. Martin, et al., Controlling magnetism with multiferroics, Mater. Today 10, 16 (2007).
Y.-H. Chu, L. W. Martin, et al., Epitaxial multiferroic BiFeO3 thin films: Progress and future directions, Ferroelectrics 354, 167 (2007).
J. F. Ihlefeld, A. Kumar, L. W. Martin, et al., Adsorption-controlled molecular-beam epitaxial growth of BiFeO3, Appl. Phys. Lett. 91, 071922 (2007).
Y.-H. Chu, T. Zhao, M.P. Cruz, Q. Zhan, P.L. Yang, L. W. Martin, et al., Ferroelectric size effects in multiferroic BiFeO3 thin films, Appl. Phys. Lett. 90, 252906 (2007).
R. Ramesh, F. Zavaliche, Y.-H. Chu, L. W. Martin, et al., Magnetoelectric complex-oxide heterostructures, Phil. Mag. Lett. 87, 155 (2007).
A. Kumar, L. W. Martin, et al., Polar and magnetic properties of PbVO3 thin films, Phys. Rev. B 75, 060101(R) (2007).
G.P. Pabst, L. W. Martin, et al., Leakage mechanisms in BiFeO3 thin films, Appl. Phys. Lett. 90, 072902 (2007).
L.W. Martin, et al., Growth and structure of PbVO3 thin films, Appl. Phys. Lett. 90, 062903 (2007).

2006

Y.-H. Chu, Q. Zhan, L. W. Martin, et al., Nanoscale domain control in multiferroic BiFeO3 thin films, Adv. Mater. 18, 2307 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