109 citations · 266 across the 14 of their papers we have counts for
8 papers · 1 filter
Band tail formation in mono and multilayered transition metal dichalcogenides: A detailed assessment and a quick-reference guide
Prasad Sarangapani, James Charles, Tillmann Kubis
Transition metal dichalcogenides (TMDs) are promising candidates for a wide variety of ultrascaled electronic, quantum computation, and optoelectronic applications. The exponential…
Non-equilibrium Green's function predictions of band tails and band gap narrowing in III-V semiconductors and nanodevices
Prasad Sarangapani, Yuanchen Chu, James Charles +1
High-doping induced Urbach tails and band gap narrowing play a significant role in determining the performance of tunneling devices and optoelectronic devices such as tunnel field-…
Control of interlayer delocalization in 2H transition metal dichalcogenides
Kuang-Chung Wang, Teodor K. Stanev, Daniel Valencia +14
It is assessed in detail both experimentally and theoretically how the interlayer coupling of transition metal dichalcogenides controls the electronic properties of the respective…
Thermal Transport Across Metal Silicide-Silicon Interfaces: First-Principles Calculations and Green's Function Transport Simulations
Sridhar Sadasivam, Ning Ye, James Charles +4
In this work, we use a combination of first-principles calculations under the density functional theory framework and heat transport simulations using the atomistic Green's functio…
Theoretical study of strain-dependent optical absorption in Stranski-Krastanov grown InAs/InGaAs/GaAs/AlGaAs quantum dots
Tarek Ameen, Hesameddin Ilatikhameneh, Yuling Hsueh +10
A detailed theoretical study of the optical absorption in self-assembled quantum dots is presented in this paper. A rigorous atomistic strain model as well as a sophisticated elect…
Hysteresis in the Conductance of Asymmetrically Biased GaAs Quantum Point Contacts with in-plane Side Gates
N. Bhandari, M. Dutta, J. Charles +2
We have observed hysteresis between the forward and reverse sweeps of a common mode bias applied to the two in-plane side gates of an asymmetrically biased GaAs quantum point conta…
Intrinsic Bistability In Quantum Point Contacts with in-plane Side Gates
J. Charles, M. Cahay, R. S. Newrock
We study the onset of intrinsic bistability and accompanying hysteresis in a single quantum point contact (QPC) with in-plane side gates in the presence of lateral spin-orbit coupl…
Tunable All Electric Spin Polarizer
J. Charles, N. Bhandari, J. Wan +2
We propose a new device to create a tunable all-electric spin polarizer: a quantum point contact (QPC) with four gates -- two in-plane side gates in series. The first pair of gates…