Quantum Spins in the Solid-State: An Atomistic Material-to-Device Modeling Approach
Online Presentations | 30 Aug 2017 | Contributor(s): Rajib Rahman
In this talk, I will present an atomistic modeling approach that combines intrinsic material and extrinsic device properties under a unified framework to describe spins and their interactions with theenvironment. This approach captures important spin properties such as exchange, spin-orbit,...
Valley Dependent g-factors in Silicon: Role of Spin-Orbit and Micromagnets
Online Presentations | 13 Dec 2016 | Contributor(s): Rajib Rahman
In this talk I will show that spin splittings in silicon quantum dots are inherently valley-dependent. Interface disorder, such as monoatomic steps, can strongly affect the intrinsic spin-orbit coupling and can cause device-to-device variations in g-factors. I will also describe the anisotropy of...
Universal Behavior of Strain in Self-assembled Quantum Dots
Downloads | 05 May 2016 | Contributor(s): Hesameddin Ilatikhameneh, Tarek Ahmed Ameen, Gerhard Klimeck, Rajib Rahman
This resource contains the universal behavior strain files produced by Nemo5. Attached also a Matlab script that can utilize the these compact descriptive files to produce the full strain distribution. Supported QD shapes; Cuboid, Dome, Cone, and Pyramid. Supported material systems;...
Atomistic Modeling of Nano Devices: From Qubits to Transistors
Online Presentations | 13 Apr 2016 | Contributor(s): Rajib Rahman
In this talk, I will describe such a framework that can capture complex interactions ranging from exchange and spin-orbit-valley coupling in spin qubits to non-equilibrium charge transport in tunneling transistors. I will show how atomistic full configuration interaction calculations of exchange...
Tunnel FET Compact Model
Tools | 11 Mar 2015 | Contributor(s): Hesameddin Ilatikhameneh, Tarek Ahmed Ameen (editor), Fan Chen (editor), Ramon Salazar, Gerhard Klimeck, Joerg Appenzeller, Rajib Rahman
Model Tunnel FETs based on analytic modeling and WKB method
Quantum Dots: Artificial Atoms & Molecules in the Solid-State
Online Presentations | 29 Jul 2014 | Contributor(s): Rajib Rahman
In this lecture, I will describe how quantum dots are similar to atoms in the periodic table, with the exception that these artificial atoms can be engineered to suit the needs of various applications. Starting from the quantum mechanics of the Hydrogen atom, I will describe two simple models of...
High Precision Quantum Control of Single Donor Spins in Silicon
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Papers | 14 Jan 2008 | Contributor(s): Rajib Rahman, marta prada, Gerhard Klimeck, Lloyd Hollenberg
The Stark shift of the hyperfine coupling constant is investigated for a P donor in Si far below the ionization regime in the presence of interfaces using tight-binding and band minima basis approaches and compared to the recent precision measurements. In contrast with previous effective...