Divine Kumah

Baksi, M., Hong, H., & Kumah, D. P. (2024). In Situ Scattering Studies of Superconducting Vacancy‐Ordered Monoclinic TiO Thin Films. Advanced Physics Research. https://doi.org/10.1002/apxr.202300086

Arnault, E. G., Al-Tawhid, A. H., Salmani-Rezaie, S., Muller, D. A., Kumah, D. P., Bahramy, M. S., … Ahadi, K. (2023). Anisotropic superconductivity at KTaO3(111) interfaces. SCIENCE ADVANCES, 9(7). https://doi.org/10.1126/sciadv.adf1414

Al-Tawhid, A. H. H., Poage, S. J. J., Salmani-Rezaie, S., Gonzalez, A., Chikara, S., Muller, D. A. A., … Ahadi, K. (2023, July 27). Enhanced Critical Field of Superconductivity at an Oxide Interface. NANO LETTERS, Vol. 7. https://doi.org/10.1021/acs.nanolett.3c01571

Negi, A., Kim, H. P., Hua, Z., Timofeeva, A., Zhang, X., Zhu, Y., … Liu, J. (2023, April 27). Ferroelectric Domain Wall Engineering Enables Thermal Modulation in PMN-PT Single Crystals. ADVANCED MATERIALS, Vol. 4. https://doi.org/10.1002/adma.202211286

Yang, N., Zhang, X., Reynolds, L., Kumah, D., & Xu, C. (2023, January 24). The Role of Carbon Content: A Comparison of the Nickel Particle Size and Magnetic Property of Nickel/Polysiloxane-Derived Silicon Oxycarbide. ADVANCED ENGINEERING MATERIALS, Vol. 1. https://doi.org/10.1002/adem.202201453

Negi, A., Rodriguez, A., Zhang, X., Comstock, A. H. H., Yang, C., Sun, D., … Liu, J. (2023, April 24). Thickness-Dependent Thermal Conductivity and Phonon Mean Free Path Distribution in Single-Crystalline Barium Titanate. ADVANCED SCIENCE, Vol. 4. https://doi.org/10.1002/advs.202301273

Chen, T., Ahmadi-Majlan, K., Lim, Z. H., Zhang, Z., Ngai, J. H., & Kumah, D. P. (2022). Effect of buffer termination on intermixing and conductivity in LaTiO3/SrTiO3 heterostructures integrated on Si(100). JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, 40(1). https://doi.org/10.1116/6.0001464

Al-Tawhid, A. H., Kanter, J., Hatefipour, M., Irving, D. L., Kumah, D. P., Shabani, J., & Ahadi, K. (2022, September 24). Oxygen Vacancy-Induced Anomalous Hall Effect in a Nominally Non-magnetic Oxide. JOURNAL OF ELECTRONIC MATERIALS, Vol. 9. https://doi.org/10.1007/s11664-022-09941-9

Ozbek, Y., Brooks, C., Zhang, X., Al-Tawhid, A., Stoica, V. A., Zhang, Z., & Kumah, D. P. (2022). Superconducting phase of TixOy thin films grown by molecular beam epitaxy. PHYSICAL REVIEW MATERIALS, 6(6). https://doi.org/10.1103/PhysRevMaterials.6.064805

Al-Tawhid, A. H., Kanter, J., Hatefipour, M., Kumah, D. P., Shabani, J., & Ahadi, K. (2022, August 19). Superconductivity and Weak Anti-localization at KTaO3 (111) Interfaces. JOURNAL OF ELECTRONIC MATERIALS, Vol. 8. https://doi.org/10.1007/s11664-022-09844-9

Zhang, X., Penn, A. N., Wysocki, L., Zhang, Z., Loosdrecht, P. H. M., Kornblum, L., … Kumah, D. P. (2022). Thickness and temperature dependence of the atomic-scale structure of SrRuO3 thin films. APL MATERIALS, 10(5). https://doi.org/10.1063/5.0087791

Koohfar, S., Ozbek, Y., Bland, H., Zhang, Z., & Kumah, D. P. (2021). Interface-driven magnetic anisotropy in relaxed La0.7Sr0.3CrO3/La0.7Sr0.3MnO3 heterostructures on MgO. JOURNAL OF APPLIED PHYSICS, 129(5). https://doi.org/10.1063/5.0033236

Al-Tawhid, A. H., Kumah, D. P., & Ahadi, K. (2021). Two-dimensional electron systems and interfacial coupling in LaCrO3/KTaO3 heterostructures. APPLIED PHYSICS LETTERS, 118(19). https://doi.org/10.1063/5.0049119

Al-Tawhid, A. H., & Kumah, D. P. (2020). Correlating polar distortions and interfacial charge at the polar/non-polar LaCrO3/SrTiO3 (001) interface. AIP Advances. https://doi.org/10.1063/5.0002298

Koohfar, S., Georgescu, A. B., Hallsteinsen, I., Sachan, R., Roldan, M. A., Arenholz, E., & Kumah, D. P. (2020). Effect of strain on magnetic and orbital ordering of LaSrCrO3/LaSrMnO3 heterostructures. Physical Review B, 101(6). https://doi.org/10.1103/PhysRevB.101.064420

Olmos, R., Iturriaga, H., Blazer, D. S., Koohfar, S., Gandha, K., Nlebedim, I. C., … Singamaneni, S. R. (2020). Exchange bias in La0.7Sr0.3CrO3/La0.7Sr0.3MnO3/La0.7Sr0.3CrO3 heterostructures. AIP Advances, 10(1), 015001. https://doi.org/10.1063/1.5130453

Penn, A. N., Koohfar, S., Kumah, D. P., & LeBeau, J. M. (2020). On the redistribution of charge in La0.7Sr0.3CrO3/La0.7Sr0.3MnO3 multilayer thin films. AIP Advances. https://doi.org/10.1063/1.5140352

Lim, Z. H., Chrysler, M., Kumar, A., Mauthe, J. P., Kumah, D. P., Richardson, C., … Ngai, J. H. (2020). Suspended single-crystalline oxide structures on silicon through wet-etch techniques: Effects of oxygen vacancies and dislocations on etch rates. Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films, 38(1). https://doi.org/10.1116/1.5135035

Vetter, E., VonWald, I., Yang, S., Yan, L., Koohfar, S., Kumah, D., … Sun, D. (2020). Tuning of spin-orbit coupling in metal-free conjugated polymers by structural conformation. Physical Review Materials. https://doi.org/10.1103/PhysRevMaterials.4.085603

Koohfar, S., Georgescu, A. B., Penn, A. N., LeBeau, J. M., Arenholz, E., & Kumah, D. P. (2019). Confinement of magnetism in atomically thin La0.7Sr0.3CrO3/La0.7Sr0.3MnO3 heterostructures. Npj Quantum Materials, 4(1). https://doi.org/10.1038/s41535-019-0164-1

Kumah, D. P., Ngai, J. H., & Kornblum, L. (2019). Epitaxial Oxides on Semiconductors: From Fundamentals to New Devices. Advanced Functional Materials, 7, 1901597. https://doi.org/10.1002/adfm.201901597

Al-Tawhid, A., Frick, J. R., Dougherty, D. B., & Kumah, D. P. (2019). Growth-temperature dependence of conductivity at the LaCrO3/SrTiO3 (001) interface. Journal of Vacuum Science & Technology A, 37(2), 021102. https://doi.org/10.1116/1.5085334

Chen, T., Ahmadi-Majlan, K., Lim, Z. H., Zhang, Z., Ngai, J. H., Kemper, A. F., & Kumah, D. P. (2018). Interfacial structure of SrZrxTi1−xO3 films on Ge. Applied Physics Letters, 113(20), 201601. https://doi.org/10.1063/1.5046394

Ahmadi-Majlan, K., Chen, T., Lim, Z. H., Conlin, P., Hensley, R., Chrysler, M., … al. (2018). Tuning metal-insulator behavior in LaTiO3/SrTiO3 heterostructures integrated directly on Si(100) through control of atomic layer thickness. Applied Physics Letters, 112(19), 193104. https://doi.org/10.1063/1.5018069

Disa, A. S., Georgescu, A. B., Hart, J. L., Kumah, D. P., Shafer, P., Arenholz, E., … Ahn, C. H. (2017). Control of hidden ground-state order in 
NdNiO3
 superlattices. Physical Review Materials, 1(2). https://doi.org/10.1103/physrevmaterials.1.024410

Ngai, J. H., Ahmadi-Majlan, K., Moghadam, J., Chrysler, M., Kumah, D., Walker, F. J., … Su, D. (2017). Electrically coupling complex oxides to semiconductors: A route to novel material functionalities. Journal of Materials Research, 32(2), 249–259. https://doi.org/10.1557/jmr.2016.496

Dogan, M., Fernandez-Peña, S., Kornblum, L., Jia, Y., Kumah, D. P., Reiner, J. W., … Walker, F. J. (2017). Single Atomic Layer Ferroelectric on Silicon. Nano Letters, 18(1), 241–246. https://doi.org/10.1021/acs.nanolett.7b03988

Koohfar, S., Disa, A. S., Marshall, M. S. J., Walker, F. J., Ahn, C. H., & Kumah, D. P. (2017). Structural distortions at polar manganite interfaces. PHYSICAL REVIEW B, 96(2). https://doi.org/10.1103/physrevb.96.024108

Ngai, J. H., Ahmadi-Majlan, K., Moghadam, J., Chrysler, M., Kumah, D. P., Ahn, C. H., … Su, D. (2016). Electrically Coupling Multifunctional Oxides to Semiconductors: A
                    Route to Novel Material Functionalities. MRS Advances, 1(4), 255–263. https://doi.org/10.1557/adv.2016.101

Kumah, D. P., Dogan, M., Ngai, J. H., Qiu, D., Zhang, Z., Su, D., … al. (2016). Engineered Unique Elastic Modes at a BaTiO3/(2×1)−Ge(001) Interface. Physical Review Letters, 116(10). https://doi.org/10.1103/physrevlett.116.106101

Zou, K., Mandal, S., Albright, S. D., Peng, R., Pu, Y., Kumah, D., … Ahn, C. H. (2016). Role of double TiO2 layers at the interface of FeSe/SrTiO3 superconductors. Physical Review B, 93(18). https://doi.org/10.1103/physrevb.93.180506

Disa, A. S., Kumah, D. P., Malashevich, A., Chen, H., Arena, D. A., Specht, E. D., … Ahn, C. H. (2015). Orbital Engineering in Symmetry-Breaking Polar Heterostructures. Physical Review Letters, 114(2). https://doi.org/10.1103/physrevlett.114.026801

Kornblum, L., Jin, E. N., Kumah, D. P., Ernst, A. T., Broadbridge, C. C., Ahn, C. H., & Walker, F. J. (2015). Oxide 2D electron gases as a route for high carrier densities on (001) Si. Applied Physics Letters, 106(20), 201602. https://doi.org/10.1063/1.4921437

Jin, E. N., Kornblum, L., Kumah, D. P., Zou, K., Broadbridge, C. C., Ngai, J. H., … Walker, F. J. (2014). A high density two-dimensional electron gas in an oxide heterostructure on Si (001). APL Materials, 2(11), 116109. https://doi.org/10.1063/1.4902433

Xiong, C., Pernice, W. H. P., Ngai, J. H., Reiner, J. W., Kumah, D., Walker, F. J., … Tang, H. X. (2014). A silicon integrated BaTiO<inf>3</inf> electro-optic modulator. Conference on Lasers and Electro-Optics Europe - Technical Digest, 2014-January. Retrieved from http://www.scopus.com/inward/record.url?eid=2-s2.0-84944698664&partnerID=MN8TOARS

Xiong, C., Pernice, W. H. P., Ngai, J. H., Reiner, J. W., Kumah, D., Walker, F. J., … Tang, H. X. (2014). Active Silicon Integrated Nanophotonics: Ferroelectric BaTiO3 Devices. Nano Letters, 14(3), 1419–1425. https://doi.org/10.1021/nl404513p

Kumah, D. P., Malashevich, A., Disa, A. S., Arena, D. A., Walker, F. J., Ismail-Beigi, S., & Ahn, C. H. (2014). Effect of Surface Termination on the Electronic Properties of LaNiO3 Films. Physical Review Applied, 2(5), 054004. https://doi.org/10.1103/physrevapplied.2.054004

Ngai, J. H., Kumah, D. P., Ahn, C. H., & Walker, F. J. (2014). Hysteretic electrical transport in BaTiO3/Ba1−xSrxTiO3/Ge heterostructures. Applied Physics Letters, 104(6), 062905. https://doi.org/10.1063/1.4864648

Kumah, D. P., Disa, A. S., Ngai, J. H., Chen, H., Malashevich, A., Reiner, J. W., … Ahn, C. H. (2014). Tuning the Structure of Nickelates to Achieve Two-Dimensional Electron Conduction. Advanced Materials, 26(12), 1935–1940. https://doi.org/10.1002/adma.201304256

Kumah, D. P., Yacoby, Y., Pauli, S. A., Willmott, P. R., & Clarke, R. (2013). La-doped BaTiO3 heterostructures: Compensating the polarization discontinuity. APL Materials, 1(6), 062107. https://doi.org/10.1063/1.4849735

Chen, H., Kumah, D. P., Disa, A. S., Walker, F. J., Ahn, C. H., & Ismail-Beigi, S. (2013). Modifying the Electronic Orbitals of Nickelate Heterostructures via Structural Distortions. Physical Review Letters, 110(18). https://doi.org/10.1103/PhysRevLett.110.186402

Disa, A. S., Kumah, D. P., Ngai, J. H., Specht, E. D., Arena, D. A., Walker, F. J., & Ahn, C. H. (2013). Phase diagram of compressively strained nickelate thin films. APL Materials, 1(3), 032110. https://doi.org/10.1063/1.4820431

Moyer, J. A., Kumah, D. P., Vaz, C. A. F., Arena, D. A., & Henrich, V. E. (2013). Role of epitaxial strain on the magnetic structure of Fe-doped CoFe2O4. Journal of Magnetism and Magnetic Materials, 345, 180–189. https://doi.org/10.1016/j.jmmm.2013.06.031

Moyer, J. A., Vaz, C. A. F., Kumah, D. P., Arena, D. A., & Henrich, V. E. (2012). Enhanced magnetic moment in ultrathin Fe-doped CoFe2O4 films. Physical Review B, 86(17). https://doi.org/10.1103/PhysRevB.86.174404

Moyer, J. A., Kumah, D. P., Vaz, C. A. F., Arena, D. A., & Henrich, V. E. (2012). Epitaxial strain-induced changes in the cation distribution and resistivity of Fe-doped CoFe2O4. Applied Physics Letters, 101(2). https://doi.org/10.1063/1.4735233

Marshall, M. S. J., Kumah, D. P., Reiner, J. W., Baddorf, A. P., Ahn, C. H., & Walker, F. J. (2012). Piezoelectric force microscopy of crystalline oxide-semiconductor heterostructures. Applied Physics Letters, 101(10). https://doi.org/10.1063/1.4750243

Kumah, D. P., Wu, J. H., Husseini, N. S., Dasika, V. D., Goldman, R. S., Yacoby, Y., & Clarke, R. (2011). Correlating structure, strain, and morphology of self-assembled InAs quantum dots on GaAs. Applied Physics Letters, 98(2). https://doi.org/10.1063/1.3535984

Moyer, J. A., Vaz, C. A. F., Arena, D. A., Kumah, D., Negusse, E., & Henrich, V. E. (2011). Magnetic structure of Fe-doped CoFe(2)O(4) probed by x-ray magnetic spectroscopies. Physical Review B, 84(5). https://doi.org/10.1103/PhysRevB.84.054447

Cohen, E., Yochelis, S., Westreich, O., Shusterman, S., Kumah, D. P., Clarke, R., … Paltiel, Y. (2011). Structure of droplet-epitaxy-grown InAs/GaAs quantum dots. Applied Physics Letters, 98(24). https://doi.org/10.1063/1.3599063

Cohen, E., Elfassy, N., Koplovitz, G., Yochelis, S., Shusterman, S., Kumah, D. P., … Paltiel, Y. (2011). Surface X-Ray Diffraction Results on the III-V Droplet Heteroepitaxy Growth Process for Quantum Dots: Recent Understanding and Open Questions. Sensors, 11(11), 10624–10637. https://doi.org/10.3390/s111110624

Kumah, D. P., Reiner, J. W., Segal, Y., Kolpak, A. M., Zhang, Z., Su, D., … Walker, F. J. (2010). The atomic structure and polarization of strained SrTiO(3)/Si. Applied Physics Letters, 97(25). https://doi.org/10.1063/1.3529460

Kumah, D. P., Shusterman, S., Paltiel, Y., Yacoby, Y., & Clarke, R. (2009). Atomic-scale mapping of quantum dots formed by droplet epitaxy. Nature Nanotechnology, 4(12), 835–838. https://doi.org/10.1038/NNANO.2009.271

Schlepütz, C. M., Willmott, P. R., Pauli, S. A., Herger, R., Martoccia, D., Björck, M., … Yacoby, Y. (2009). Surface x-ray diffraction of complex metal oxide surfaces and interfaces - a new era. AIP Conference Proceedings, 1092, 9–12. https://doi.org/10.1063/1.3086245

Surface x-ray diffraction of complex metal oxide surfaces and interfaces - a new era. (2009). In Synchrotron Radiation in Materials Science (Vol. 1092, pp. 9–12).

Liu, L., Husseini, N. S., Torbet, C. J., Kumah, D. P., Clarke, R., Pollock, T. M., & Jones, J. W. (2008). In situ imaging of high cycle fatigue crack growth in single crystal nickel-base superalloys by synchrotron X-radiation. Journal of Engineering Materials and Technology-Transactions of the Asme, 130(2), 0210081–0210086. https://doi.org/10.1115/1.2840966

Husseini, N. S., Kumah, D. P., Yi, J. Z., Torbet, C. J., Arms, D. A., Dufresne, E. M., … Clarke, R. (2008). Mapping single-crystal dendritic microstructure and defects in nickel-base superalloys with synchrotron radiation. Acta Materialia, 56(17), 4715–4723. https://doi.org/10.1016/j.actamat.2008.05.041

Resonant coherent Bragg rod analysis of strained epitaxial heterostructures. (2008). Applied Physics Letters, 93(8). https://doi.org/10.1063/1.2975835

Cionca, C. N., Riposan, A., Kumah, D. P., Husseini, N. S., Walko, D. A., Yacoby, Y., … Clarke, R. (2008). Strain and composition mapping of epitaxial nanostructures. Applied Physics Letters, 92(15). https://doi.org/10.1063/1.2908214

Structure determination of monolayer-by-monolayer grown La1-xSrxMnO3 thin films and the onset of magnetoresistance. (2008). Physical Review B, 77(8). https://doi.org/10.1103/PhysRevB.77.085401

Kumah, D. P., Cebollada, A., Clavero, C., Garcia-Martin, J. M., Skuza, JR, Lukaszew, R. A., & Clarke, R. (2007). Optimizing the planar structure of (111) Au/Co/Au trilayers. Journal of Physics D-Applied Physics, 40(9), 2699–2704. https://doi.org/10.1088/0022-3727/40/9/003

Boschetto, D., Mourou, G., Rousse, A., Mordovanakis, A., Hou, B. X., Nees, J., … Clarke, R. (2007). Spatial coherence properties of a compact and ultrafast laser-produced plasma keV x-ray source. Applied Physics Letters, 90(1). https://doi.org/10.1063/1.2426941

Willmott, P. R., Pauli, S. A., Herger, R., Schlepütz, C. M., Martoccia, D., Patterson, B. D., … Yacoby, Y. (2007). Structural basis for the conducting interface between LaAlO3 and SrTiO3. Physical Review Letters, 99(15). https://doi.org/10.1103/PhysRevLett.99.155502

Surface plasmon resonance effects in the Magneto Optical activity of noble metal-ferro magnet ultrathin films. (2007). Conference on Lasers and Electro-Optics Europe - Technical Digest. https://doi.org/10.1109/CLEOE-IQEC.2007.4386554

Gonzalez-Diaz, J. B., Garcia-Martin, A., Armelles, G., Garcia-Martin, J. M., Clavero, C., Cebollada, A., … Skuza, J. (2007). Surface plasmon resonance effects in the Magneto Optical activity of noble metal-ferromagnet ultrathin films. Optics InfoBase Conference Papers. Retrieved from http://www.scopus.com/inward/record.url?eid=2-s2.0-84899093598&partnerID=MN8TOARS

Gonzalez-Diaz, J. B., Garcia-Martin, A., Armelles, G., Garcia-Martin, J. M., Clavero, C., Cebollada, A., … Clarke, R. (2007). Surface-magnetoplasmon nonreciprocity effects in noble-metal/ferromagnetic heterostructures. Physical Review B, 76(15). https://doi.org/10.1103/PhysRevB.76.153402

Boschetto, D., Mordovanakis, A., Nees, J., Hou, B., Kumah, D., Clarke, R., … Rousse, A. (2006). Demonstration of spatial coherence with a compact and ultrafast x-ray source. Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, CLEO/QELS 2006. https://doi.org/10.1109/CLEO.2006.4627599