Publications

    • 2023

      • [61]Athby H Al-Tawhid, Samuel J Poage, Salva Salmani-Rezaie, Shalinee Chikara, David A Muller, Divine P Kumah, Maria N Gastiasoro, Jose Lorenzana, Kaveh Ahadi, Enhanced Critical Field of Superconductivity at an Oxide Interface arXiv preprint arXiv:2304.14426 (May 2023)
      • [60]Ankit Negi, Alejandro Rodriguez, Xuanyi Zhang, Andrew H. Comstock, Cong Yang,Dali Sun, Xiaoning Jiang, Divine Kumah, Ming Hu, and Jun Liu, Thickness-dependent thermal conductivity and phonon mean free path distribution in single-crystalline barium titanate. Advanced Science 2023, 2301273 (Adv. Sci.2023, 2301273)
      • [59]Ankit Negi, Hwang Pill Kim, Zilong Hua, Anastasia Timofeeva, Xuanyi Zhang, Yong Zhu, Kara Peters, Divine Kumah, Xiaoning Jiang, Jun Liu, Ferroelectric Domain Wall Engineering Enabled Thermal Modulation in PMN‐PT Single Crystals, Advanced Materials adma.202211286 (2023)
      • [58] Ethan G. Arnault, Athby H. Al-Tawhid, Salva Salmani-Rezaie, David A. Muller, Divine P. Kumah, Mohammad S. Bahramy, Gleb Finkelstein and Kaveh Ahadi, Anisotropic superconductivity at KTaO3(111) interfaces. Science Advances 9, eadf1414(2023)
      • [57] N. Yang, X. Zhang, L. Reynolds, D. Kumah, C. Xu, The Role of Carbon Content: A Comparison of the Nickel Particle Size and Magnetic Property of Nickel/Polysiloxane-Derived Silicon Oxycarbide Advanced Engineering Materials 2023, 2201453 (January 2023)
    • 2022

    • 2021

      • [52] A Penn, S Koohfar, D Kumah, J LeBeau, Combined iDPC and EELS analyses for quantifying oxygen vacancy concentration in LSMO Microscopy and Microanalysis 27 (S1), 1196-1197 (2021)
      • [51] A. H. Al-Tawhid, J. Kanter, M. Hatefipour, D. L. Irving, D. P. Kumah, J. Shabani, K. Ahadi, Oxygen vacancy-induced anomalous Hall effect in a non-magnetic oxide . arXiv:2109.08073 (2021)
      • [50] A.H. Al-Tawhid, D.P. Kumah,  K. Ahadi, Two-dimensional electron systems and interfacial coupling in LaCrO3/KTaO3 heterostructures, Appl. Phys. Lett. 118, 192905 (2021) 
      • [49] S. Koohfar, Y. Ozbek, H. S. Bland, Z. Zhang, D. P. Kumah, Interface-driven magnetic anisotropy in relaxed La0.7Sr0.3CrO3/La0.7Sr0.3MnO3 heterostructures on MgOJ. Applied Physics 129, 055301 (2021);   (arXiv:2010.07180 )
    • 2020

    • 2019

    • 2018

    • 2017

      • [35]Ankit S. Disa, Alexandru B. Georgescu, James L. Hart, Divine P. Kumah, Padraic Shafer, Elke Arenholz, Dario A. Arena, Sohrab Ismail-Beigi, Mitra L. Taheri, Frederick J. Walker, and Charles H. Ahn. Control of hidden ground-state order in NdNiO3 superlattices  Phys. Rev. Materials 1, 024410 – Published 27 July 2017
      • [34]J. H. Ngai, K. Ahmadi-Majlan, J. Moghadam, M. Chrysler, D. Kumah, F. J. Walker, C. H. Ahn, T. Droubay, Y. Du, S. A. Chambers, M. Bowden, X. Shen, D. Su, “Electrically coupling complex oxides to semiconductors:  a route to novel material functionalities”, Journal of Materials Research 32, 249-259 (2017)
      • [33]  S. Koohfar A. S. Disa, M. Marshall, F. J. Walker, C. H. Ahn and D. P. Kumah, Structural Distortions At Polar Manganite Interfaces  arXiv:1704.05114 [cond-mat.str-el] (April 2017). Phys. Rev. B 96, 024108 (July 2017)

    • 2016

      • [32] K. Zou, S. Mandal, S. Albright, R. Peng, Y. Pu, D. Kumah, C. Lau, G. Simon, O. E. Dagdeviren, Xi He, Ivan Bozovic, Udo D. Schwarz, Eric I. Altman, D. Feng, F.J. Walker, S. Ismail-Beigi, C. H. Ahn, The role of double TiO2 layers at the interface of FeSe/SrTiO3 superconductors.  arXiv:1605.01312 [cond-mat.str-el] (May 2016) Physical Review B 93 (18), 180506 (May 2016)
      • [31] D. P. Kumah, M. Dogan, J. H. Ngai, D. Qiu, Z. Zhang, D. Su, E. D. Specht, S. Ismail-Beigi, C. H. Ahn, and F. J. Walker. Engineered Unique Elastic Modes at a BaTiO3/(2×1)−Ge(001) Interface. Phys. Rev. Lett. 116, 106101, (7 March 2016)

      • [30] J. H. Ngai, K. Ahmadi-Majlan, J. Moghadam, M. Chrysler, D. P. Kumah, C. H. Ahn, F. J. Walker, T. Droubay, M. Bowden, S. A. Chambers, X. Shen and D. Su. Electrically Coupling Multifunctional Oxides to Semiconductors: A Route to Novel Material Functionalities.  MRS Advances Vol 1, Issue 4, 55-263 , (January 2016)

    • 2015

      2014

      • [27] E. N. Jin, L. Kornblum, Divine P. Kumah, K. Zou, C. C. Broadbridge, J. H. Ngai, C. H. Ahn and F. J. Walker. A high density two-dimensional electron gas in an oxide heterostructure on Si (001).. Applied Physics Materials. 2, 116109 (2014)
      • [26] Divine P. Kumah, Andrei Malashevich, Ankit S. Disa, Dario A. Arena, Frederick J. Walker, Sohrab Ismail-Beigi, and Charles H. Ahn. Effect of Surface Termination on the Electronic Properties of LaNiO3 Films.. Physical Review Applied, 2, 054004 (2014)
      • [25] D. P. Kumah, A.S. Disa, J.H. Ngai, H. Chen, J. W. Reiner, S. Ismail-Beigi, F.J. Walker and C.H. Ahn. Tuning the Structure of Nickelates to Achieve Two-Dimensional Electron Conduction. Advanced Materials, 26, 1935 (2014)
      • [24] C. Xiong, W. H. P. Pernice, J.H. Ngai, J. W. Reiner, D. P. Kumah, F. J. Walker, C. H. Ahn and H. X. Tang. Active integrated optics on silicon: ferroelectric BaTiO3 devices. Nano. Lett., 14, 1419 (2014)
      • [23] JH Ngai, D. P. Kumah CH Ahn, FJ Walker. Hysteretic electrical transport in BaTiO3/Ba{1-x}Sr{x}TiO3 /Ge heterostructures. App. Phys. Lett, 104 , 062905 (2014)

      2013

      • [22] D. P. Kumah, Y. Yacoby, S. A. Pauli, P. R. Willmott and R. Clarke La-doped BaTiO3 heterostructures: Compensating the polarization discontinuity. APL Mat. 1, 062107 (Dec 2013)
      • [21] Chen, H.; D. P. Kumah; Disa, A. S; Walker, F. J; Ahn, C. H; Ismail-Beigi, S. Modifying the Electronic Orbitals of Nickelate Heterostructures via Structural Distortions.. Phys. Rev. Lett. 110, 186402 (2013)
      • [20] A.S. Disa, D. P. Kumah, JH Ngai, ED Specht, DA Arena, FJ Walker and CH Ahn. Phase diagram of compressively strained nickelate thin films.. APL Materials 1 (3), 032110 (2013)
      • [19] J.A. Moyer, D. P. Kumah, C.A.F. Vaz, D.A. Arena, V.E. Henrich Role of epitaxial strain on the magnetic structure of Fe-doped CoFe2O4.. J. of M. Mag. Mat., Volume 345, 180 (2013)

      2012

      • [18] J.A. Moyer, C.A.F. Vaz, D. P. Kumah, DA Arena, VE Henrich. Enhanced magnetic moment in ultrathin Fe-doped CoFe2O4 films.. Phys. Rev. B 86, 174404 (2012)
      • [17] M. S. J. Marshall, D. P. Kumah, J. W. Reiner, A. P. Baddorf, C. H. Ahn, and F. J. Walker. Piezoelectric force microscopy of crystalline oxide-semiconductor heterostructures. Appl. Phys. Lett. 101, 102902 (2012)
      • [16] J. A. Moyer, D. P. Kumah, C. A. F. Vaz, D. A. Arena, and V. E. Henrich. Epitaxial strain-induced changes in the cation distribution and resistivity of Fe-doped CoFe2O4.. Appl. Phys. Lett. 101, 021907 (2012)

      2011

      • [15] E. Cohen, N. Elfassy, G. Koplovitz, S. Yochelis, S. Shusterman, D. P. Kumah, Y. Yacoby, R. Clarke and Y. Paltiel. Surface X-Ray Diffraction Results on the III-V Droplet Heteroepitaxy Growth Process for Quantum Dots: Recent Understanding and Open Questions.. Sensors 11, 10624 (Nov. 2011)
      • [14] J. A. Moyer, C. A. F. Vaz, D. A. Arena, D. P. Kumah, E. Negusse, and V. E. Henrich. Magnetic structure of Fe-doped CoFe2O4 probed by x-ray magnetic spectroscopies.. Phys. Rev. B 84, 054447 (2011)
      • [13] E. Cohen, S. Yochelis, O. Westreich, S. Shusterman, D. P. Kumah, R. Clarke, Y. Yacoby, and Y. Paltiel. Structure of droplet-epitaxy-grown InAs/GaAs quantum dots.. Appl. Phys. Lett. 98, 243115 (2011)
      • [12] D. P. Kumah, J. H. Wu, N. S. Husseini, V. D. Dasika, R. S. Goldman, Y. Yacoby, and R. Clarke. Correlating structure, strain, and morphology of self-assembled InAs quantum dots on GaAs. Appl. Phys. Lett. 98, 021903 (2011)

      2010

      • [11] D. P. Kumah ; Reiner J. W.; Segal Y.; Kolpak A. M.; Zhang Z.; Su D.; Zhu Y.; Sawicki M.S.; Broadbridge C. C.; Ahn C. H.; Walker F. J., The atomic structure and polarization of strained SrTiO3/Si. Appl. Phys. Lett. 97, 251902 (2010)

      2009

      2008

      • [8] D. P. Kumah, A. Riposan, C. N. Cionca, N. S. Husseini, R. Clarke, J. Y. Lee, J. M. Millunchick, Y. Yacoby, C. M. Schlepütz, M. Björck, and P. R. Willmott . Resonant coherent Bragg rod analysis of strained epitaxial heterostructure. Appl. Phys. Lett. 93, 081910 (2008).
      • [7] C. N. Cionca, A. Riposan, D. P. Kumah, N. S. Husseini, D. A. Walko, Y. Yacoby, J. M. Millunchick, and R. Clarke. Strain and composition mapping of epitaxial nanostructures.Appl. Phys. Lett. 92, 151914 (2008)
      • [6] R. Herger, P. R. Willmott, C. M. Schlepütz, M. Björck, S. A. Pauli, D. Martoccia, B. D. Patterson, D. Kumah, R. Clarke, Y. Yacoby, and M. Döbeli. Structure determination of monolayer-by-monolayer grown La1-xSrxMnO3 thin films and the onset of magnetoresistance. PHYSICAL REVIEW B 77, 085401( Febuary 1 2008)
      • [5] Liu Liu, Naji S. Husseini, Christopher J. Torbet,Divine P. Kumah, Roy Clarke, Tresa M. Pollock, and J. Wayne Jones. In Situ Imaging of High Cycle Fatigue Crack Growth in Single Crystal Nickel-Base Superalloys by Synchrotron X-Radiation. J. Eng. Mater. Technol. 130, 021008 (2008)

      2007

      • [4] P. R. Willmott, S. A. Pauli, R. Herger, C. M. Schlepütz, D. Martoccia, B. D. Patterson, B. Delley, R. Clarke, D. Kumah, C. Cionca, and Y. Yacoby. Structural Basis for the Conducting Interface between LaAlO3 and SrTiO3 . Phys. Rev. Lett. 99, 155502 (October 9 2007)
      • [3] J. B. González-Díaz, A. García-Martín, G. Armelles, J. M. García-Martín, C. Clavero, A. Cebollada, . A. Lukaszew, J. R. Skuza, D. P. Kumah, and R. Clarke. Surface-magnetoplasmonnonreciprocity effects in noble-metal/ferromagnetic heterostructures. Phys.Rev. B 76, 153402 (5 October 2007)
      • [2] D P Kumah, A Cebollada, C Clavero, J-M Garcia-Martin, J Skuza, R A Lukaszew and R Clarke. Optimizing the planar structure of (111) Au/Co/Au trilayers. J. Phys. D: Appl. Phys. 40 (April 2007) 2699–2704
      • [1] D. Boschetto, G. Mourou, A. Rousse, A. Mordovanakis, Bixue Hou, J. Nees, D. Kumah, R. Clarke. Spatial coherence properties of a compact and ultrafast laser-produced plasma keV x-ray source. Appl. Phys. Lett. 90, 011106 (Jan. 2007)