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{
"metadata": {
"name": "",
"signature": "sha256:247cbf7511831aaf13adbf586a5a4c7c4e491e38e060a5558f6021f692906cbf"
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"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter17-The Band Theory of Solids"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex1-pg522"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"##Example 17.1\n",
"##calculation of probability\n",
"\n",
"##given values\n",
"E=.01;##energy difference in eV\n",
"kT=.026;##temperture equivalent at room temp in e\n",
"\n",
"##calculation\n",
"P=1/(1+(math.e**(E/kT)));\n",
"\n",
"print'%s %.2f %s'%('interatomic spacing is',P,'');\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"interatomic spacing is 0.41 \n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex2-pg523"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"##Example 17.2\n",
"##calculation of velocity of e\n",
"\n",
"##given values\n",
"e=1.6*10**-19.;##charge of e in C\n",
"E=2.1*e;##fermi level in J\n",
"m=9.1*10**-31.;##mass of e in kg\n",
"\n",
"##calculation\n",
"v=math.sqrt(2.*E/m);\n",
"\n",
"print'%s %.2f %s'%('velocity of e(in m/s)',v,'');\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"velocity of e(in m/s) 859337.85 \n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex3-pg523"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"##Example 17.3\n",
"##calculation of velocity of fraction of free electrons\n",
"\n",
"##given values\n",
"E=5.5;##fermi level in eV\n",
"kT=.026;##temperture equivalent at room temp in e\n",
"\n",
"##calculation\n",
"f=2.*kT/E;\n",
"\n",
"print'%s %.4f %s'%('fraction of free electrone\\s upto width kT on either side of Ef is',f,'');\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"fraction of free electrone\\s upto width kT on either side of Ef is 0.0095 \n"
]
}
],
"prompt_number": 3
}
],
"metadata": {}
}
]
}
|
