Application of nanoHUB Tools in the
Classroom
Dragica Vasileska
Arizona State University
vasileska@asu.edu
Users in
Sept 2010
172 countries
Outline
Gerhard Klimeck
Network for Computational Nanotechnology (NCN)
Purdue, Norfolk State, Northwestern, MIT, Molecular Foundry, UC Berkeley, Univ. of Illinois, UTEP
How to Use Tools?
Crystal
Viewer
Gerhard Klimeck
PN Junction
Lab
PCPBT
Courses at ASU That Utilize nanoHUB.org
EEE352:
Properties of
Electronic
Materials
(D.K. Ferry)
ABACUS
Gerhard Klimeck
EEE434:
Quantum
Mechanics for
Engineers
(D. K. Ferry)
AQME
EEE533:
Semiconductor
Device and
Process
Modeling
(D. Vasileska)
ABACUS
EEE598:
Advanced
Device
Simulation
(D. Vasileska)
AQME +
ABACUS
EEE598:
Modeling
Optoelectronic
Devices
(D. Vasileska)
Network for Computational Nanotechnology (NCN)
Purdue, Norfolk State, Northwestern, MIT, Molecular Foundry, UC Berkeley, Univ. of Illinois, UTEP
Selected Tools Within
ABACUS Used in
Education
PN
Junction
Module
MOS
Capacitors
Module
Gerhard Klimeck
Engine Behind The Tools Chosen from ABACUS
PADRE
Gerhard Klimeck
PADRE (Pisces And Device REplacement)
developed by Mark Pinto at AT&T Bell Labs.
ABACUS: PN Junction Lab
4585 user(s), detailed usage
1374 user(s) in 83 class(es)
2 Citation(s)
Gerhard Klimeck
PN Junction Lab: Electric Field Profile
Gerhard Klimeck
PN Junction Lab: Total Charge Density
Gerhard Klimeck
PN Junction Lab: IV Characteristics
Gerhard Klimeck
ABACUS: MOS Capacitors Tool
Gerhard Klimeck
2341 user(s),
detailed usage
583 user(s) in 33 class(es)
2 Citation(s)
MOSCap: Electron Density
Tox = 1 nm
NA = 1017 cm-3
VG = 0 V
Tox = 1 nm
NA = 1017 cm-3
VG = 1 V
Gerhard Klimeck
MOSCap: Capacitance
Gerhard Klimeck
Network for Computational Nanotechnology (NCN)
Purdue, Norfolk State, Northwestern, MIT, Molecular Foundry, UC Berkeley, Univ. of Illinois, UTEP
Selected Tools Within
AQME Used in
Education
BSC Lab
PCPBT
SCHRED
Gerhard Klimeck
AQME: BSC Lab
Type of Confinement Most Commonly
Encountered in Practical Applications
The Form of the Wavefunctions
When Quantum Mechanics Approaches
Classical Mechanics?
329 user(s), detailed usage
32 user(s) in 4 class(es)
Gerhard Klimeck
BSC Lab: Confinement
Type of Confinement Most Commonly
Encountered in Practical Applications
Gerhard Klimeck
BSC Lab: Wavefunctions
The Form of the Wavefunctions
Gerhard Klimeck
BSC Lab: Quantum and Classical Physics
When Quantum Mechanics Approaches
Classical Mechanics?
Quantum Behavior
Gerhard Klimeck
Towards Classical Physics
AQME + ABACUS: PCPBT
PCPBT
Symmetric vs.
Asymmetric Double
Barrier Structure
From 1 Well, to 2
Wells to 5 wells to
Periodic Potentials
514 user(s), detailed usage
30 user(s) in 6 class(es)
Gerhard Klimeck
PCPBT: Symmetric vs. Asymmetric Structure
Symmetric barriers
Gerhard Klimeck
Asymmetric barriers
PCPBT: From 1 Well to 2 wells to 5 wells
to Periodic Potentials
Gerhard Klimeck
AQME: Schred
When Quantum
Effects Become
Important?
Modeling of
GaAs
Capacitors
Classical vs.
Quantum
Mechanical
Charge Density
Modeling of
Strained Si
Capacitors
Degradation of
the Total Gate
Capacitance
Shift in the
Threshold
Voltage
Gerhard Klimeck
1934 user(s), detailed usage
263 user(s) in 31 class(es)
104 Citation(s)
Schred: When quantum effects
become important?
NA=1016, 1017 and 1018 cm-3
Tox=1 nm
Degradation of total
gate capacitance
Shift in the threshold
voltage
Schred as Teaching Tool
Gerhard Klimeck
Schred: Classical vs. quantum-mechanical
charge density
NA = 1018 cm-3, Tox = 1 nm
Schred as Teaching Tool
Gerhard Klimeck
Schred: Degradation of the
total gate capacitance
1
0.9
tot
C /C
ox
0.8
T=300 K, N A=1018 cm-3
0.7
classical M-B, metal gates
0.6
classical F-D, metal gates
quantum, metal gates
0.5
19
quantum, poly-gates N =6x10
0.4
D
20
quantum, poly-gates N =10
D
0.3
0.2
1
-3
cm
20
3
-3
quantum, poly-gates N =2x10
cm
4
9
D
2
-3
cm
5
6
7
8
Oxide thickness t [nm]
ox
Schred as Research Tool
Gerhard Klimeck
10
Schred: Shift in the threshold voltage
500
Van Dort experimental data for t =14 nm
ox
V
th
[mV]
400
Our simulation results for t =14 nm
ox
300
200
100
0
10
16
10
17
10
-3
N [cm ]
A
Schred as Research Tool
Gerhard Klimeck
18
Schred: Modeling of Strained Si Capacitors
Schred as Research Tool
Gerhard Klimeck
Schred: Modeling of GaAs Capacitors
Schred as Research Tool
Gerhard Klimeck
Conclusions
Tools on the
nanoHUB are
useful for:
Gerhard Klimeck
Teaching in the
classroom for
real-time
demonstrations
Homework
assignments to
better
understand
device physics
concepts
Research