<?xml version="1.0"?> <!DOCTYPE ipe SYSTEM "ipe.dtd"> <ipe version="70005" creator="Ipe 7.1.2"> <info created="D:20130526223907" modified="D:20130616235749"/> <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="fermi3"> 108 124 m 172 124 l 172 148 l 140 148 l 124 148 108 144 s </path> <path fill="lightgray" gradient="fermi3"> 108 200 m 108 124 l 76 124 l 76 200 l h </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> <path fill="lightgray" gradient="fermi1"> 64 480 m 64 356 l 32 356 l 32 480 l h </path> <path fill="darkgray" gradient="fermi2"> 112 216 m 176 216 l 176 240 l 144 240 l 128 240 112 236 s </path> <path fill="lightgray" gradient="fermi2"> 112 340 m 176 340 l 176 258 l 144 258 l 128 258 112 254 s </path> <path fill="lightgray" gradient="fermi1"> 132 480 m 128 464 l 64 460 l 60 480 l h </path> <path fill="lightgray" gradient="fermi1"> 192 480 m 192 398 l 128 398 l 128 480 l h </path> <path fill="darkgray" gradient="fermi1"> 192 380 m 192 356 l 128 356 l 128 380 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 matrix="1 0 0 1 -96 264" stroke="black" arrow="fnormal/normal"> 224 128 m 224 200 l </path> <path matrix="1 0 0 1 -96 256" stroke="black" dash="dotted" pen="heavier"> 216 208 m 232 208 l </path> <path matrix="1 0 0 1 -48 264" stroke="black" pen="fat"> 112 196 m 176 200 l </path> <path matrix="1 0 0 1 -96 268" stroke="black" pen="fat"> 288 112 m 224 112 l </path> <path matrix="1 0 0 1 -96 254" stroke="black" pen="fat"> 224 144 m 288 144 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> <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 matrix="1 0 0 1 16 12" stroke="black" pen="fat"> 160 246 m 128 246 l 112 246 96 242 s </path> <path matrix="1 0 0 1 16 -6" stroke="black" pen="fat"> 160 246 m 128 246 l 112 246 96 242 s </path> <path fill="lightgray" gradient="fermi3"> 108 200 m 172 200 l 172 166 l 140 166 l 124 166 108 162 s </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 matrix="1 0 0 1 12 -80" stroke="black" pen="fat"> 160 246 m 128 246 l 112 246 96 242 s </path> <path matrix="1 0 0 1 12 -98" stroke="black" pen="fat"> 160 246 m 128 246 l 112 246 96 242 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> </page> </ipe>