Coupled Effect of Strain and Magnetic Field on Electronic Bandstructure of Graphene

07 Dec 2010 | Publications | Contributor(s): yashudeep singh

We explore the possibility of coupling between planar strain and perpendicular magnetic field on electronic bandstructure of graphene. We study uni-axially, bi-axially and shear strained graphene …

https://nanohub.org/resources/10126

ABACUS: Test for Bandstructure Lab

10 Aug 2010 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

This is a test that examines ones understanding of electronic structure once he/she has gone through the materials and exercises provided on the nanoHUB as part of the ABACUS Bandstructure topic page …

https://nanohub.org/resources/9493

Nanoelectronic Modeling Lecture 41: Full-Band and Atomistic Simulation of Realistic 40nm InAs HEMT

05 Aug 2010 | Online Presentations | Contributor(s): Gerhard Klimeck, Neerav Kharche, Neophytos Neophytou, Mathieu Luisier

This presentation demonstrates the OMEN capabilities to perform a multi-scale simulation of advanced InAs-based high mobility transistors. Learning Objectives: Quantum Transport Simulator …

https://nanohub.org/resources/9285

Nanoelectronic Modeling Lecture 35: Alloy Disorder in Nanowires

05 Aug 2010 | Online Presentations | Contributor(s): Gerhard Klimeck, Timothy Boykin, Neerav Kharche, Mathieu Luisier, Neophytos Neophytou

This presentation discusses the consequences of Alloy Disorder in unstrained strained AlGaAs nanowires Relationship between dispersion relationship and transmission in perfectly ordered wires …

https://nanohub.org/resources/9280

Nanoelectronic Modeling Lecture 34: Alloy Disorder in Quantum Dots

05 Aug 2010 | Online Presentations | Contributor(s): Gerhard Klimeck, Timothy Boykin, Chris Bowen

This presentation discusses the consequences of Alloy Disorder in strained InGaAs Quantum Dots Reminder of the origin of bandstructure and bandstructure engineering What happens when there is …

https://nanohub.org/resources/9279

Description of the K.P Method for Band Structure Calculation

05 Aug 2010 | Teaching Materials | Contributor(s): Dragica Vasileska

This set of slides describes the k.p mehod for band structure calculation.

https://nanohub.org/resources/9454

Nanoelectronic Modeling Lecture 33: Alloy Disorder in Bulk

04 Aug 2010 | Online Presentations | Contributor(s): Gerhard Klimeck, Timothy Boykin, Chris Bowen

This presentation discusses disorder in AlGaAs unstrained systems in bulk. Bandstructure of an ideal simple unit cell What happens when there is disorder? Concept of a supercell …

https://nanohub.org/resources/9278

Thermoelectric Nanotechnology

27 Jul 2010 | Online Presentations | Contributor(s): Mark Lundstrom

his talk is an undergraduate level introduction to the field. After a brief discussion of applications, the physics of the Peltier effect is described, and the Figure of Merit (FOM), ZT, which …

https://nanohub.org/resources/9421

ABACUS Exercise: Bandstructure – Kronig-Penney Model and Tight-Binding Exercise

20 Jul 2010 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

The objective of this exercise is to start with the simple Kronig-Penney model and understand formations of bands and gaps in the dispersion relation that describes the motion of carriers in 1D …

https://nanohub.org/resources/9372

Nanoelectronic Modeling Lecture 25a: NEMO1D - Full Bandstructure Effects

07 Jul 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

(quantitative RTD modeling at room temperature)

https://nanohub.org/resources/8594

Band Structure Lab Exercise

28 Jun 2010 | Teaching Materials | Contributor(s): Gerhard Klimeck, Parijat Sengupta, Dragica Vasileska

Investigations of the electron energy spectra of solids form one of the most active fields of research. Knowledge of band theory is essential for application to specific problems such as Gunn diodes, …

https://nanohub.org/resources/9233

Ripples and Warping of Graphene: A Theoretical Study

08 Jun 2010 | Online Presentations | Contributor(s): Umesh V. Waghmare

We use first-principles density functional theory based analysis to understand formation of ripples in graphene and related 2-D materials. For an infinite graphene, we show that ripples are linked …

https://nanohub.org/resources/9010

Tight-Binding Band Structure Calculation Method

08 Jun 2010 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

This set of slides describes on simple example of a 1D lattice, the basic idea behind the Tight-Binding Method for band structure calculation.

https://nanohub.org/resources/9122

InAs: Evolution of iso-energy surfaces for heavy, light, and split-off holes due to uniaxial strain.

25 May 2010 | Animations | Contributor(s): Abhijeet Paul, Denis Areshkin, Gerhard Klimeck

Movie was generated using Band Structure Lab tool at nanoHUB and allows to scan over four parameters: Hole energy measured from the top of the corresponding band (i.e. the origin of energy scales …

https://nanohub.org/resources/9016

Band Structure Calculation: General Considerations

17 May 2010 | Teaching Materials | Contributor(s): Dragica Vasileska

This set of slides explains to the users the concept of valence vs. core electrons, the implications of the adiabatic approximation on the separation of the total Hamiltonian of the system and the …

https://nanohub.org/resources/9003

Empirical Pseudopotential Method: Theory and Implementation

17 May 2010 | Teaching Materials | Contributor(s): Dragica Vasileska

This tutorial first teaches the users the basic theory behind the Empirical Pseudopotential (EPM)Bandstructure Calculation method. Next, the implementation details of the method are described and …

https://nanohub.org/resources/8999

ninithi

13 May 2010 | Downloads | Contributor(s): Chanaka Suranjith Rupasinghe, Mufthas Rasikim

ninithi which is a free and opensource modelling software, can be used to visualize and analyze carbon allotropes used in nanotechnology. You can generate 3-D visualization of Carbon nanotubes, …

https://nanohub.org/resources/8987

Nanotechnology Animation Gallery

22 Apr 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Gerhard Klimeck

Animations and visualization are generated with various nanoHUB.org tools to enable insight into nanotechnology and nanoscience. Click on image for detailed description and larger image download. …

https://nanohub.org/resources/8882

Electronic band structure

12 Apr 2010 | Animations | Contributor(s): Saumitra Raj Mehrotra, Gerhard Klimeck

In solid-state physics, the electronic band structure (or simply band structure) of a solid describes ranges of energy in which an electron is "forbidden" or "allowed". The band structure is also …

https://nanohub.org/resources/8814

Nanoelectronic Modeling Lecture 25b: NEMO1D - Hole Bandstructure in Quantum Wells and Hole Transport in RTDs

09 Mar 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

Heterostructures such as resonant tunneling diodes, quantum well photodetectors and lasers, and cascade lasers break the symmetry of the crystalline lattice. Such break in lattice symmetry causes a …

https://nanohub.org/resources/8595