<?xml version="1.0"?>
<!DOCTYPE ipe SYSTEM "ipe.dtd">
<ipe version="70005" creator="Ipe 7.1.2">
<info created="D:20130526223907" modified="D:20130616235703"/>
<ipestyle name="cust">
<symbol name="arrow/fnormal(spx)">
<path fill="black">
0 0 m
-1 0.333 l
-1 -0.333 l
h
</path>
</symbol>
<pen name="heavier" value="0.8"/>
<pen name="fat" value="1.2"/>
<pen name="ultrafat" value="2"/>
<symbolsize name="large" value="5"/>
<symbolsize name="small" value="2"/>
<symbolsize name="tiny" value="1.1"/>
<arrowsize name="large" value="10"/>
<arrowsize name="small" value="5"/>
<arrowsize name="tiny" value="3"/>
<color name="darkgray" value="0.4"/>
<color name="lightgray" value="0.827"/>
<dashstyle name="dashed" value="[4] 0"/>
<dashstyle name="dotted" value="[1 1] 0"/>
<dashstyle name="dash dotted" value="[4 2 1 2] 0"/>
<dashstyle name="dash dot dotted" value="[4 2 1 2 1 2] 0"/>
<textsize name="large" value="\large"/>
<textsize name="small" value="\small"/>
<textsize name="tiny" value="\tiny"/>
<textsize name="Large" value="\Large"/>
<textsize name="LARGE" value="\LARGE"/>
<textsize name="huge" value="\huge"/>
<textsize name="Huge" value="\Huge"/>
<textsize name="footnote" value="\footnotesize"/>
<textstyle name="center" begin="\begin{center}" end="\end{center}"/>
<textstyle name="itemize" begin="\begin{itemize}" end="\end{itemize}"/>
<textstyle name="item" begin="\begin{itemize}\item{}" end="\end{itemize}"/>
<gridsize name="4 pts" value="4"/>
<gridsize name="8 pts (~3 mm)" value="8"/>
<gridsize name="16 pts (~6 mm)" value="16"/>
<gridsize name="32 pts (~12 mm)" value="32"/>
<gridsize name="10 pts (~3.5 mm)" value="10"/>
<gridsize name="20 pts (~7 mm)" value="20"/>
<gridsize name="14 pts (~5 mm)" value="14"/>
<gridsize name="28 pts (~10 mm)" value="28"/>
<gridsize name="56 pts (~20 mm)" value="56"/>
<gridsize name="2 pts" value="2"/>
<anglesize name="90 deg" value="90"/>
<anglesize name="60 deg" value="60"/>
<anglesize name="45 deg" value="45"/>
<anglesize name="30 deg" value="30"/>
<anglesize name="22.5 deg" value="22.5"/>
<gradient name="fermi1" type="axial" coords="0 382 0 402" extend="yes">
 <stop offset="0" color="0.25"/>
 <stop offset="1" color="0.9"/>
</gradient>
<gradient name="fermi2" type="axial" coords="0 242 0 262" extend="yes">
 <stop offset="0" color="0.25"/>
 <stop offset="1" color="0.9"/>
</gradient>
<gradient name="fermi3" type="axial" coords="0 150 0 170" extend="yes">
 <stop offset="0" color="0.25"/>
 <stop offset="1" color="0.9"/>
</gradient>
<tiling name="falling" angle="-60" step="4" width="1"/>
<tiling name="rising" angle="30" step="4" width="1"/>
</ipestyle>
<page>
<layer name="alpha"/>
<view layers="alpha" active="alpha"/>
<path layer="alpha" fill="darkgray" gradient="fermi1">
128 356 m
192 356 l
192 380 l
160 380 l
144 380
128 382 s
</path>
<path fill="lightgray" gradient="fermi1">
128 480 m
192 480 l
192 398 l
160 398 l
144 398
128 400 s
</path>
<path stroke="black" pen="fat">
192 398 m
160 398 l
144 398
128 400 s
</path>
<path stroke="black" pen="fat">
192 380 m
160 380 l
144 380
128 382 s
</path>
<path fill="darkgray" gradient="fermi2">
112 216 m
176 216 l
176 240 l
144 240 l
128 240
112 238 s
</path>
<path fill="lightgray" gradient="fermi2">
112 340 m
176 340 l
176 258 l
144 258 l
128 258
112 256 s
</path>
<path fill="lightgray" gradient="fermi1">
132 480 m
128 468 l
64 460 l
60 480 l
h
</path>
<path fill="lightgray" gradient="fermi1">
64 480 m
64 356 l
32 356 l
32 480 l
h
</path>
<text matrix="1 0 0 1 -132 232" transformations="translations" pos="160 160" stroke="black" type="label" width="12.993" height="6.812" depth="1.49" halign="right" valign="center">$E_{\rm F}$</text>
<path matrix="1 0 0 1 -48 264" stroke="black" dash="dotted" pen="heavier">
76 128 m
240 128 l
</path>
<path matrix="1 0 0 1 -64 260" stroke="black" dash="dotted" pen="heavier">
120 200 m
136 200 l
</path>
<text matrix="1 0 0 1 -40 424" transformations="translations" pos="88 48" stroke="black" type="label" width="12.453" height="6.815" depth="1.93" halign="center" valign="baseline">Ag</text>
<path matrix="1 0 0 1 -48 264" stroke="black" arrow="fnormal/normal">
112 128 m
112 196 l
</path>
<text matrix="1 0 0 1 -48 264" transformations="translations" pos="112 160" stroke="black" type="label" width="17.653" height="6.808" depth="2.85" halign="right" valign="baseline">$\Phi_{\rm Ag}$</text>
<path stroke="black" arrow="fnormal/normal">
128 392 m
128 468 l
</path>
<path matrix="1 0 0 1 -96 260" stroke="black" dash="dotted" pen="heavier">
216 208 m
232 208 l
</path>
<path stroke="black" pen="fat">
64 460 m
128 468 l
</path>
<text matrix="1 0 0 1 32 240" transformations="translations" pos="160 160" stroke="black" type="label" width="13.54" height="6.812" depth="1.49" valign="center">$E_{\rm C}$</text>
<text matrix="1 0 0 1 32 220" transformations="translations" pos="160 160" stroke="black" type="label" width="13.84" height="6.812" depth="1.49" valign="center">$E_{\rm V}$</text>
<text matrix="1 0 0 1 72 424" transformations="translations" pos="88 48" stroke="black" type="label" width="17.603" height="6.808" depth="0" halign="center" valign="baseline">$n$-Si</text>
<text matrix="1 0 0 1 16 264" transformations="translations" pos="112 160" stroke="black" type="label" width="14.349" height="6.812" depth="1.49" valign="baseline">$\Phi_{\rm Si}$</text>
<text matrix="1 0 0 1 -72 256" transformations="translations" pos="168 216" stroke="black" type="label" width="33.486" height="4.289" depth="0" halign="center" valign="baseline">vacuum</text>
<path matrix="1 0 0 1 -48 264" stroke="black" pen="heavier">
96 92 m
96 88 l
208 88 l
208 92 l
</path>
<path matrix="0.5 0 0 0.5 32 316" fill="black">
4 0 0 4 256 80 e
</path>
<path matrix="0.5 0 0 0.5 -80 316" fill="black">
4 0 0 4 256 80 e
</path>
<path fill="lightgray" gradient="fermi2">
116 340 m
112 320 l
108 320 l
104 340 l
h
</path>
<path fill="lightgray" gradient="fermi2">
108 340 m
108 216 l
76 216 l
76 340 l
h
</path>
<text matrix="1 0 0 1 -88 92" transformations="translations" pos="160 160" stroke="black" type="label" width="12.993" height="6.812" depth="1.49" halign="right" valign="center">$E_{\rm F}$</text>
<path matrix="1 0 0 1 16 12" stroke="black" dash="dotted" pen="heavier">
56 240 m
160 240 l
</path>
<path matrix="1 0 0 1 16 12" stroke="black" dash="dotted" pen="heavier">
84 308 m
104 308 l
</path>
<text matrix="1 0 0 1 4 284" transformations="translations" pos="88 48" stroke="black" type="label" width="12.453" height="6.815" depth="1.93" halign="center" valign="baseline">Ag</text>
<path matrix="1 0 0 1 -4 124" stroke="black" arrow="fnormal/normal">
112 128 m
112 196 l
</path>
<text matrix="1 0 0 1 -4 124" transformations="translations" pos="112 160" stroke="black" type="label" width="17.653" height="6.808" depth="2.85" halign="right" valign="baseline">$\Phi_{\rm Ag}$</text>
<path matrix="1 0 0 1 16 12" stroke="black" arrow="fnormal/normal">
96 240 m
96 308 l
</path>
<path matrix="1 0 0 1 16 12" stroke="black" pen="fat">
92 308 m
96 308 l
</path>
<text matrix="1 0 0 1 16 100" transformations="translations" pos="160 160" stroke="black" type="label" width="13.54" height="6.812" depth="1.49" valign="center">$E_{\rm C}$</text>
<text matrix="1 0 0 1 16 80" transformations="translations" pos="160 160" stroke="black" type="label" width="13.84" height="6.812" depth="1.49" valign="center">$E_{\rm V}$</text>
<text matrix="1 0 0 1 56 284" transformations="translations" pos="88 48" stroke="black" type="label" width="17.603" height="6.808" depth="0" halign="center" valign="baseline">$n$-Si</text>
<text matrix="1 0 0 1 0 124" transformations="translations" pos="112 160" stroke="black" type="label" width="14.349" height="6.812" depth="1.49" valign="baseline">$\Phi_{\rm Si}$</text>
<path matrix="1 0 0 1 16 12" stroke="black" pen="heavier">
76 204 m
76 200 l
128 200 l
128 204 l
</path>
<path matrix="0.5 0 0 0.5 16 176" fill="black">
4 0 0 4 256 80 e
</path>
<path matrix="0.5 0 0 0.5 -36 176" fill="black">
4 0 0 4 256 80 e
</path>
<path stroke="black" pen="fat">
176 258 m
144 258 l
128 258
112 256 s
</path>
<path stroke="black" pen="fat">
176 240 m
144 240 l
128 240
112 238 s
</path>
<path fill="darkgray" gradient="fermi3">
108 124 m
172 124 l
172 148 l
140 148 l
124 148
108 154 s
</path>
<path fill="lightgray" gradient="fermi3">
108 200 m
172 200 l
172 166 l
140 166 l
124 166
108 172 s
</path>
<path fill="lightgray" gradient="fermi3">
108 200 m
108 124 l
76 124 l
76 200 l
h
</path>
<text matrix="1 0 0 1 -88 0" transformations="translations" pos="160 160" stroke="black" type="label" width="12.993" height="6.812" depth="1.49" halign="right" valign="center">$E_{\rm F}$</text>
<path matrix="1 0 0 1 16 80" stroke="black" dash="dotted" pen="heavier">
56 80 m
156 80 l
</path>
<text matrix="1 0 0 1 4 144" transformations="translations" pos="88 48" stroke="black" type="label" width="12.453" height="6.815" depth="1.93" halign="center" valign="baseline">Ag</text>
<text matrix="1 0 0 1 12 8" transformations="translations" pos="160 160" stroke="black" type="label" width="13.54" height="6.812" depth="1.49" valign="center">$E_{\rm C}$</text>
<text matrix="1 0 0 1 12 -12" transformations="translations" pos="160 160" stroke="black" type="label" width="13.84" height="6.812" depth="1.49" valign="center">$E_{\rm V}$</text>
<text matrix="1 0 0 1 52 144" transformations="translations" pos="88 48" stroke="black" type="label" width="17.603" height="6.808" depth="0" halign="center" valign="baseline">$n$-Si</text>
<path matrix="1 0 0 1 16 80" stroke="black" pen="heavier">
76 44 m
76 40 l
124 40 l
124 44 l
</path>
<path matrix="0.5 0 0 0.5 12 84" fill="black">
4 0 0 4 256 80 e
</path>
<path matrix="0.5 0 0 0.5 -36 84" fill="black">
4 0 0 4 256 80 e
</path>
<path stroke="black" pen="fat">
172 166 m
140 166 l
124 166
108 172 s
</path>
<path stroke="black" pen="fat">
172 148 m
140 148 l
124 148
108 154 s
</path>
<text matrix="1 0 0 1 20 -32" transformations="translations" pos="4 316" stroke="black" type="minipage" width="40" height="12.891" depth="7.92" valign="baseline" style="center">Nearly\\touching</text>
<text matrix="1 0 0 1 60 52" transformations="translations" pos="4 316" stroke="black" type="minipage" width="64" height="11.873" depth="6.89" valign="baseline" style="center">Long\\distance</text>
<text matrix="1 0 0 1 20 -140" transformations="translations" pos="4 316" stroke="black" type="minipage" width="40" height="5.898" depth="0.91" valign="baseline" style="center">Contact</text>
<text matrix="1 0 0 1 -6 4" transformations="translations" pos="112 160" stroke="black" type="label" width="13.263" height="6.812" depth="1.49" halign="right" valign="baseline">$\Phi_{\rm B}$</text>
<path stroke="black" arrow="fnormal/normal">
108 160 m
108 172 l
</path>
</page>
</ipe>