<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1452750219310_2412">Hello QE users,</div><div id="yui_3_16_0_1_1452750219310_2412" dir="ltr">I am trying to apply a saw tooth potential on an interface. I have included enough vacuum, my original system extended from z=0 to z=7.7 in alat units. With vacuum, I have the z-direction now from z=0 to z=15.6 in alat units. Now I need to add the E-field, so people advised to have the system lies between (emaxpos+eopreg-1) and (emaxpos+eopreg), my values are :</div><div id="yui_3_16_0_1_1452750219310_2412" dir="ltr" class=""> emaxpos = 0.9</div><div id="yui_3_16_0_1_1452750219310_2412" dir="ltr" class=""> eopreg = 0.1</div><div id="yui_3_16_0_1_1452750219310_2412" dir="ltr" class="">which means my system will be lying between 0.0x(z=15.6) and 1.0x(z=15.6) thats between 0 and 15.6 in alat units. Is this correct?</div><div id="yui_3_16_0_1_1452750219310_2412" dir="ltr" class=""><br></div><div id="yui_3_16_0_1_1452750219310_2412" dir="ltr" class=""><a name="eamp" style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif;" id="yui_3_16_0_1_1452750219310_3119" class="" href=""></a></div><div dir="ltr" id="yui_3_16_0_1_1452750219310_3136"></div><div id="yui_3_16_0_1_1452750219310_2412" dir="ltr" class=""><br></div><div id="yui_3_16_0_1_1452750219310_2412" dir="ltr" class=""><br></div><div id="yui_3_16_0_1_1452750219310_2412" dir="ltr" class="">Regards,</div><div id="yui_3_16_0_1_1452750219310_2412" dir="ltr" class="">Jaret</div><div id="yui_3_16_0_1_1452750219310_2412" dir="ltr" class="">ASU, USA</div><div id="yui_3_16_0_1_1452750219310_2412" dir="ltr" class=""><br></div></div></body></html>