Simulation of Nanoelectronic Devices: The Purdue NanoHub

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Simulation of Nanoelectronic Devices The Purdue
NanoHub

• Nikolaus Barge
• Department of Physics Astronomy
• Ball State University
• Physics 483
• Advisor Dr. Ron Cosby
• Center for Computational Nanoscience

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Outline

• What is a nanoelectronic device?
• Simulation and modeling
• The NanoHub a general tour
• Electronics tools at the NanHub
• FETToy

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What is a nanoelectronic device?

• Why nanotechnology?
• Limits on Scalability
• Heat Dissipation
• Tunneling
• A really small device
• U.S. National Nanotechnology Initiative
• lt100 nm with novel properties. (nm 10-9m)
• Examples of Nanometer-Scale Devices
• Quantum-Dots
• Single-electron Transistors
• controlled electron tunneling to amplify current
• Resonance Tunneling Device
• quantum device use to control current

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Simulation and modeling to design electronic
devices

• The emergence of genuinely new phenomena at the
  nanoscale creates a great need for theory,
  modeling and large-scale computer simulation in
  order to understand the new nanoscale phenomena
  and regime.
• -from the Project Summary of BSU CCN
• Better understanding of parameters and
  constraints of devices
• Builds a framework for experimentation

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What is the NanoHub?

• A website for online computing
• A warehouse of research for the nanotechnology
  community
• A place to learn and do research on new
  techniques new devices
• Simulations in areas of Electronics, Chemistry,
  Electronic circuit design, and more
• Powered by an interface which ships computing
  jobs to the other computers
• PUNCH - A pool of machines available for jobs
  submitted through the nanoHUB

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The NanoHub a general tour

• www.Nanohub.org

• www.Nanohub.org

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Electronics tools

• CNTBands
• Computes E(k) and Density-Of-States (DOS) vs.
  Energy for Carbon Nanotubes.
• FETToy
• Analytically calculates the ballistic I-V of a
  double gate ultra thin body MOSFET.
• Huckel-IV2.0
• Calculates Density of States, Transmission
  Function, Resistance and Conductance Spectrum of
  Molecular Systems.
• MolCToy
• A collection of simple theoretical models of the
  conduction through individual molecules between
  two contacts.
• NanoMOS 2.5
• Simulates nanoscale DG and SG SOI MOSFETs using
  classical, quantum, or drift-diffusion transport.
• Schred
• Self-consistently solves the 1D Schrodinger and
  the 1D Poisson equation for a MOS or SOS
  structure.
• SETE
• Computes the equilibrium electronic structure of
  a GaAs- AlGaAs two-dimensional electron gas
  heterostructure with surface electrostatic gates.
• TBGreen
• Calculates the transmission and reflection
  coefficient from mode 1 -gt mode 1 in a
  T-structure.
• TunProb
• 1-D Electron Tunneling Transmission Probability
  Tool.

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FETToy

• FETToy 2.0
• A set of Matlab scripts that calculate the I-V
  characteristics for
• conventional MOSFETs
• Nanowire MOSFETs
• Carbon NanoTube MOSFETs
• Simulation Outputs
• Linear plot of Id vs. Vgs at low and high Vds
• Logarithmic plot of Id vs. Vgs at low and high
  Vds
• Plot of Id vs. Vds at different Vgs
• Linear plot of Mobile Charge vs. Vgs at low and
  high Vds
• Logarithmic plot of Mobile Charge vs. Vgs at low
  and high Vds
• Plot of Mobile Charge vs. Vds at different Vgs
• Plot of Quamtum Capacitance vs. Vgs at low and
  high Vds
• Plot of Injection Velocity vs. Vgs at high Vds

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FETToy Run Screen
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Simulation In Progress
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Output
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Output continued . . .
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Summary

• What is a nanoelectronic device? very small
  devices to ovecome limits on scalability
• The NanoHub - A website for online computing and
  education in nanoscience
• Electronics tools 9 availble modeling,
  computational, and simulation programs
• FETToy an example of simulated nantechnology