Works (41)

2019 journal article

Confinement of magnetism in atomically thin La0.7Sr0.3CrO3/La0.7Sr0.3MnO3 heterostructures

Npj Quantum Materials, 4(1).

By: S. Koohfar, A. Georgescu, A. Penn, J. LeBeau, E. Arenholz & D. Kumah

Sources: Web Of Science, ORCID, Crossref
Added: June 17, 2019

2019 journal article

Epitaxial Oxides on Semiconductors: From Fundamentals to New Devices

Advanced Functional Materials, 7, 1901597.

By: D. Kumah, J. Ngai & L. Kornblum

Sources: Crossref, ORCID
Added: August 17, 2019

2019 journal article

Growth-temperature dependence of conductivity at the LaCrO3/SrTiO3 (001) interface

Journal of Vacuum Science & Technology A, 37(2), 021102.

By: A. Al-Tawhid, J. Frick, D. Dougherty & D. Kumah

Sources: Web Of Science, ORCID, Crossref
Added: March 25, 2019

2018 journal article

Interfacial structure of SrZrxTi1−xO3 films on Ge

Applied Physics Letters, 113(20), 201601.

By: T. Chen, K. Ahmadi-Majlan, Z. Lim, Z. Zhang, J. Ngai, A. Kemper, D. Kumah

Sources: NC State University Libraries, ORCID, Crossref
Added: December 3, 2018

2018 journal article

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.

By: K. Ahmadi-Majlan, T. Chen, Z. Lim, P. Conlin, R. Hensley, M. Chrysler, D. Su, H. Chen ...

Sources: ORCID, Crossref
Added: August 12, 2019

2017 journal article

Control of hidden ground-state order in NdNiO3 superlattices

Physical Review Materials, 1(2).

By: A. Disa, A. Georgescu, J. Hart, D. Kumah, P. Shafer, E. Arenholz, D. Arena, S. Ismail-Beigi ...

Sources: Crossref, ORCID
Added: August 17, 2019

2017 journal article

Single Atomic Layer Ferroelectric on Silicon

Nano Letters, 18(1), 241–246.

By: M. Dogan, S. Fernandez-Peña, L. Kornblum, Y. Jia, D. Kumah, J. Reiner, Z. Krivokapic, A. Kolpak ...

Sources: Crossref, ORCID
Added: August 17, 2019

2017 journal article

Structural distortions at polar manganite interfaces

Physical Review B, 96(2).

By: S. Koohfar, A. Disa, M. Marshall, F. Walker, C. Ahn & D. Kumah

Sources: NC State University Libraries, ORCID
Added: August 6, 2018

2016 journal article

Electrically Coupling Multifunctional Oxides to Semiconductors: A Route to Novel Material Functionalities

MRS Advances, 1(4), 255–263.

By: J. Ngai, K. Ahmadi-Majlan, J. Moghadam, M. Chrysler, D. Kumah, C. Ahn, F. Walker, T. Droubay ...

Sources: Crossref, ORCID
Added: August 17, 2019

2016 journal article

Engineered Unique Elastic Modes at a BaTiO3/(2×1)−Ge(001) Interface

Physical Review Letters, 116(10).

By: D. Kumah, M. Dogan, J. Ngai, D. Qiu, Z. Zhang, D. Su, E. Specht, S. Ismail-Beigi ...

Sources: Crossref, ORCID
Added: August 17, 2019

2016 journal article

Role of double TiO2 layers at the interface of FeSe/SrTiO3 superconductors

Physical Review B, 93(18).

By: K. Zou, S. Mandal, S. Albright, R. Peng, Y. Pu, D. Kumah, C. Lau, G. Simon ...

Sources: Crossref, ORCID
Added: August 17, 2019

2015 journal article

Orbital Engineering in Symmetry-Breaking Polar Heterostructures

Physical Review Letters, 114(2).

By: A. Disa, D. Kumah, A. Malashevich, H. Chen, D. Arena, E. Specht, S. Ismail-Beigi, F. Walker, C. Ahn

Sources: Crossref, ORCID
Added: August 17, 2019

2015 journal article

Oxide 2D electron gases as a route for high carrier densities on (001) Si

Applied Physics Letters, 106(20), 201602.

By: L. Kornblum, E. Jin, D. Kumah, A. Ernst, C. Broadbridge, C. Ahn, F. Walker

Source: ORCID
Added: August 12, 2019

2014 journal article

A high density two-dimensional electron gas in an oxide heterostructure on Si (001)

APL Materials, 2(11), 116109.

By: E. Jin, L. Kornblum, D. Kumah, K. Zou, C. Broadbridge, J. Ngai, C. Ahn, F. Walker

Source: ORCID
Added: August 12, 2019

2014 journal article

Active Silicon Integrated Nanophotonics: Ferroelectric BaTiO3 Devices

Nano Letters, 14(3), 1419–1425.

By: C. Xiong, W. Pernice, J. Ngai, J. Reiner, D. Kumah, F. Walker, C. Ahn, H. Tang

Sources: Crossref, ORCID
Added: August 17, 2019

2014 journal article

Effect of Surface Termination on the Electronic Properties of LaNiO3 Films

Physical Review Applied, 2(5), 054004.

By: D. Kumah, A. Malashevich, A. Disa, D. Arena, F. Walker, S. Ismail-Beigi, C. Ahn

Sources: Crossref, ORCID
Added: August 17, 2019

2014 journal article

Hysteretic electrical transport in BaTiO3/Ba1−xSrxTiO3/Ge heterostructures

Applied Physics Letters, 104(6), 062905.

By: J. Ngai, D. Kumah, C. Ahn & F. Walker

Sources: Crossref, ORCID
Added: August 17, 2019

2014 journal article

Tuning the Structure of Nickelates to Achieve Two-Dimensional Electron Conduction

Advanced Materials, 26(12), 1935–1940.

By: D. Kumah, A. Disa, J. Ngai, H. Chen, A. Malashevich, J. Reiner, S. Ismail-Beigi, F. Walker, C. Ahn

Sources: Crossref, ORCID
Added: August 17, 2019

2013 journal article

La-doped BaTiO3 heterostructures: Compensating the polarization discontinuity

APL Materials, 1(6), 062107.

By: D. Kumah, Y. Yacoby, S. Pauli, P. Willmott & R. Clarke

Sources: Crossref, ORCID
Added: August 17, 2019

2013 journal article

Modifying the Electronic Orbitals of Nickelate Heterostructures via Structural Distortions

Physical Review Letters, 110(18).

By: H. Chen, D. Kumah, A. Disa, F. Walker, C. Ahn & S. Ismail-Beigi

Source: ORCID
Added: August 12, 2019

2013 journal article

Phase diagram of compressively strained nickelate thin films

APL Materials, 1(3), 032110.

By: A. Disa, D. Kumah, J. Ngai, E. Specht, D. Arena, F. Walker, C. Ahn

Sources: Crossref, ORCID
Added: August 17, 2019

2013 journal article

Role of epitaxial strain on the magnetic structure of Fe-doped CoFe2O4

Journal of Magnetism and Magnetic Materials, 345, 180–189.

By: J. Moyer, D. Kumah, C. Vaz, D. Arena & V. Henrich

Source: ORCID
Added: August 12, 2019

2012 journal article

Enhanced magnetic moment in ultrathin Fe-doped CoFe2O4 films

Physical Review B, 86(17).

By: J. Moyer, C. Vaz, D. Kumah, D. Arena & V. Henrich

Source: ORCID
Added: August 12, 2019

2012 journal article

Epitaxial strain-induced changes in the cation distribution and resistivity of Fe-doped CoFe2O4

Applied Physics Letters, 101(2).

By: J. Moyer, D. Kumah, C. Vaz, D. Arena & V. Henrich

Source: ORCID
Added: August 12, 2019

2012 journal article

Piezoelectric force microscopy of crystalline oxide-semiconductor heterostructures

Applied Physics Letters, 101(10).

By: M. Marshall, D. Kumah, J. Reiner, A. Baddorf, C. Ahn & F. Walker

Source: ORCID
Added: August 12, 2019

2011 journal article

Correlating structure, strain, and morphology of self-assembled InAs quantum dots on GaAs

Applied Physics Letters, 98(2).

By: D. Kumah, J. Wu, N. Husseini, V. Dasika, R. Goldman, Y. Yacoby, R. Clarke

Source: ORCID
Added: August 12, 2019

2011 journal article

Magnetic structure of Fe-doped CoFe(2)O(4) probed by x-ray magnetic spectroscopies

Physical Review B, 84(5).

By: J. Moyer, C. Vaz, D. Arena, D. Kumah, E. Negusse & V. Henrich

Source: ORCID
Added: August 12, 2019

2011 journal article

Structure of droplet-epitaxy-grown InAs/GaAs quantum dots

Applied Physics Letters, 98(24).

By: E. Cohen, S. Yochelis, O. Westreich, S. Shusterman, D. Kumah, R. Clarke, Y. Yacoby, Y. Paltiel

Source: ORCID
Added: August 12, 2019

2011 journal article

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.

By: E. Cohen, N. Elfassy, G. Koplovitz, S. Yochelis, S. Shusterman, D. Kumah, Y. Yacoby, R. Clarke, Y. Paltiel

Source: ORCID
Added: August 12, 2019

2010 journal article

The atomic structure and polarization of strained SrTiO(3)/Si

Applied Physics Letters, 97(25).

By: D. Kumah, J. Reiner, Y. Segal, A. Kolpak, Z. Zhang, D. Su, Y. Zhu, M. Sawicki ...

Source: ORCID
Added: August 12, 2019

2009 journal article

Atomic-scale mapping of quantum dots formed by droplet epitaxy

Nature Nanotechnology, 4(12), 835–838.

By: D. Kumah, S. Shusterman, Y. Paltiel, Y. Yacoby & R. Clarke

Source: ORCID
Added: August 12, 2019

2009 book

Surface x-ray diffraction of complex metal oxide surfaces and interfaces - a new era

Synchrotron Radiation in Materials Science (Vol. 1092, pp. 9–12).

Source: ORCID
Added: August 12, 2019

2008 journal article

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).

By: L. Liu, N. Husseini, C. Torbet, D. Kumah, R. Clarke, T. Pollock, J. Jones

Source: ORCID
Added: August 12, 2019

2008 journal article

Mapping single-crystal dendritic microstructure and defects in nickel-base superalloys with synchrotron radiation

Acta Materialia, 56(17), 4715–4723.

By: N. Husseini, D. Kumah, J. Yi, C. Torbet, D. Arms, E. Dufresne, T. Pollock, J. Jones, R. Clarke

Source: ORCID
Added: August 12, 2019

2008 journal article

Resonant coherent Bragg rod analysis of strained epitaxial heterostructures

Applied Physics Letters, 93(8).

Source: ORCID
Added: August 12, 2019

2008 journal article

Strain and composition mapping of epitaxial nanostructures

Applied Physics Letters, 92(15).

By: C. Cionca, A. Riposan, D. Kumah, N. Husseini, D. Walko, Y. Yacoby, J. Millunchick, R. Clarke

Source: ORCID
Added: August 12, 2019

2008 journal article

Structure determination of monolayer-by-monolayer grown La1-xSrxMnO3 thin films and the onset of magnetoresistance

Physical Review B, 77(8).

Source: ORCID
Added: August 12, 2019

2007 journal article

Optimizing the planar structure of (111) Au/Co/Au trilayers

Journal of Physics D-Applied Physics, 40(9), 2699–2704.

By: D. Kumah, A. Cebollada, C. Clavero, J. Garcia-Martin, . Skuza, R. Lukaszew, R. Clarke

Source: ORCID
Added: August 12, 2019

2007 journal article

Spatial coherence properties of a compact and ultrafast laser-produced plasma keV x-ray source

Applied Physics Letters, 90(1).

By: D. Boschetto, G. Mourou, A. Rousse, A. Mordovanakis, B. Hou, J. Nees, D. Kumah, R. Clarke

Source: ORCID
Added: August 12, 2019

2007 journal article

Structural basis for the conducting interface between LaAlO3 and SrTiO3

Physical Review Letters, 99.

Source: ORCID
Added: August 12, 2019

2007 journal article

Surface-magnetoplasmon nonreciprocity effects in noble-metal/ferromagnetic heterostructures

Physical Review B, 76(15).

By: J. Gonzalez-Diaz, A. Garcia-Martin, G. Armelles, J. Garcia-Martin, C. Clavero, A. Cebollada, R. Lukaszew, . Skuza, D. Kumah, R. Clarke

Source: ORCID
Added: August 12, 2019

Employment

2015 - present

North Carolina State University Raleigh, NC, US
Assistant Professor Physics