60 citations · 84 across the 6 of their papers we have counts for
6 papers
Charge dynamics at nitrogen impurities and nitrogen-vacancy centers in diamond
Chandan Kumar Vishwakarma, J. K. Nangoi, Mark E. Turiansky +1
The nitrogen-vacancy (NV) center in diamond is the prototype quantum defect that enables a variety of diamond-based quantum technologies. However, charge-state instability and spec…
A CN complex as an alternative to the T center in Si
J. K. Nangoi, M. E. Turiansky, C. G. Van de Walle
We present a first-principles study of a carbon-nitrogen (CN) impurity complex in silicon as an isoelectronic alternative to the T center [(CCH)]. The latter has been…
First-principles studies of Schottky barriers and tunneling properties at Al(111)/Si(111) and CoSi(111)/Si(111) interfaces
J. K. Nangoi, C. J. Palmstrøm, C. G. Van de Walle
We present first-principles calculations of Schottky barrier heights (SBHs) at interfaces relevant for silicon-based merged-element transmon qubit devices. Focusing on Al(111)/Si(1…
Ab initio study of the crystal and electronic structure of mono- and bi-alkali antimonides: Stability, Goldschmidt-like tolerance factors, and optical properties
J. K. Nangoi, M. Gaowei, A. Galdi +4
Mono- and bi-alkali antimonides, XYSb (X and Y from Group I), are promising for next-generation electron emitters due to their capability of producing high-quality electron bea…
Ab initio many-body photoemission theory of transverse energy distribution of photoelectrons: PbTe(111) as a case study with experimental comparisons
J. Kevin Nangoi, Siddharth Karkare, Ravishankar Sundararaman +2
This manuscript presents, to our knowledge, the first fully ab initio many-body photoemission framework to predict the transverse momentum distributions and the mean transverse ene…
Ultracold electrons via Near-Threshold Photoemission from Single-Crystal Cu(100)
Siddharth Karkare, Gowri Adhikari, W. Andreas Schroeder +4
Achieving a low mean transverse energy or temperature of electrons emitted from the photocathode-based electron sources is critical to the development of next-generation and compac…