dpkumah at ncsu.edu
….Partners III, Room 151
NC State University, Department of Physics
851 Main Campus Dr., Raleigh NC 27606.
Divine Kumah received his Ph.D in Applied Physics from the University of Michigan in 2009 and did postdoctoral research at the Center for Research in Interface and Surface Phenomena at Yale University.
His research interests are in experimental condensed matter physics and are aimed at understanding the novel properties which emerge at the interfaces between crystalline materials.
The Kumah Research Group at NC State uses state of the art atomic layer-by-layer deposition techniques including molecular beam epitaxy to fabricate thin crystalline oxide films. The group is focused on understanding how atomic-scale structural distortions at interfaces can be manipulated to induce novel electronic and magnetic phenomena and the development of pathways for harnessing these unique functionalities for electronic and energy applications. Tools used by the group include atomic force microscopy, electron diffraction and synchrotron-based x-ray spectroscopy and diffraction.
Select Publications | Complete List Of Publications
S. Koohfar A. S. Disa, M. Marshall, F. J. Walker, C. H. Ahn and D. P. Kumah, Structural Distortions At Polar Manganite Interfaces, Phys. Rev. B 96, 024108 (2017). link
D. P. Kumah, M. Dogan, J. H. Ngai, D. Qiu, Z. Zhang, D. Su, E. D. Specht, S. Ismail-Beigi, C. H. Ahn, F. J. Walker, Engineered Unique Elastic Modes at a BaTiO3/(2×1)−Ge(001) Interface, Phys. Rev. Lett. 116, 106101 (2016). link
A S. Disa, D.P. Kumah, A. Malashevich, H. Chen, D. A. Arena, E. Specht, F. J. Walker, S. Ismail-Beigi, and C. H. Ahn., Orbital Engineering in Symmetry-breaking Polar Heterostructures, Phys. Rev. Lett. 114, 026801 (2015). link
D. P. Kumah, A.i Malashevich, A. S. Disa, D. A. Arena, F. J. Walker, S. Ismail-Beigi, C. H. Ahn, Effect of Surface Termination on the Electronic Properties of LaNiO3 Films, Phys. Rev. Appl. 2, 054004 (2014). link
D.P. Kumah, AS Disa, J.H Ngai, H Chen, A. Malashevich, J. W. Reiner, S. Ismail-Beigi, F.J. Walker and C.H. Ahn., Tuning the Structure of Nickelates to Achieve Two-Dimensional Electron Conduction , Adv. Mater. 26, 1935 (2014). link
D. P. Kumah, S. Shusterman, Yossi Paltiel, Y. Yacoby and R. Clarke., Atomic-scale Mapping of Quantum Dots Formed by Droplet Epitaxy, Nature Nano. 4, 835 (2009). link
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 (2007). link