<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2003000200003</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Fuerza termoelectromotriz en semiconductores bipolares: nuevo punto de vista]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gurevich]]></surname>
<given-names><![CDATA[Yu.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortiz]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Instituto Politécnico Nacional Centro de Investigación y de estudios Avanzados Departamento de Física]]></institution>
<addr-line><![CDATA[México Distrito Federal]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2003</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2003</year>
</pub-date>
<volume>49</volume>
<numero>2</numero>
<fpage>115</fpage>
<lpage>122</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2003000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2003000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2003000200003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Presentamos un nuevo método para calcular la fuerza termoelectromotriz en semiconductores bipolares dentro de la aproximación lineal a la teoría, tomando en cuenta los portadores de carga fuera del equilibrio generados en la muestra tras aplicar un campo de temperatura. Por primera vez se define con precisión cuáles son los portadores de carga fuera del equilibrio y cómo debe escribirse la ecuación de Poisson para tomarlos en cuenta. También por primera vez se tomó en cuenta el término proporcional al cambio de temperatura local producido por el gradiente de temperatura aplicado en la expresión para la recombinación volumétrica para calcular la fuerza termoelectromotriz, dando por resultado que ésta y la resistencia del semiconductor dependen no sólo de los parámetros tradicionales como las conductividades eléctricas y potencias termoeléctricas de electrones y huecos, sino también de las tasas de recombinación volumétrica y superficial.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[We present a new method for calculating the thermoelectromotive force in bipolar semiconductors within the linear approximation to the theory, taking into account the non-equilibrium charge carriers generated in the sample when the temperature field is applied. For the first time it is precisely defined which are the non-equilibrium charge carriers and how to write the Poisson equation to take them into account. For the first time it is taken into account the term that is proportional to the local change in temperature produced by the gradient of temperature, in the expression for the recombination rate to calculate the thermoelectromotive force given the result that this and the semiconductor's resistance do not depend solely on traditional parameters such as electric conductivities and thermoelectric powers of electrons and holes, but do depend also on surface and bulk recombination rates as well.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Fuerza termoelectromotriz (Termo-fem)]]></kwd>
<kwd lng="es"><![CDATA[efecto Seebeck]]></kwd>
<kwd lng="es"><![CDATA[potencia termoeléctrica]]></kwd>
<kwd lng="es"><![CDATA[fenómenos de contacto entre metal y semiconductor]]></kwd>
<kwd lng="es"><![CDATA[tasas de recombinación]]></kwd>
<kwd lng="es"><![CDATA[condición de cuasineutralidad]]></kwd>
<kwd lng="en"><![CDATA[Thermoelectromotive force (Termo-emf)]]></kwd>
<kwd lng="en"><![CDATA[Seebeck effect]]></kwd>
<kwd lng="en"><![CDATA[Thermoelectric power]]></kwd>
<kwd lng="en"><![CDATA[contact phenomena between metal and semiconductor]]></kwd>
<kwd lng="en"><![CDATA[recombination rates]]></kwd>
<kwd lng="en"><![CDATA[quasineutrality condition]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	    <p align="justify"><font face="verdana" size="4">Investigaci&oacute;n</font></p>      <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="4"><b>Fuerza termoelectromotriz en semiconductores bipolares: nuevo punto de vista</b></font></p>      <p align="center"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="2"><b>Yu. Gurevich y A. Ortiz</b></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><i>Departamento de F&iacute;sica, Centro de Investigaci&oacute;n y de estudios Avanzados del IPN, Apartado Postal 14&#45;740, M&eacute;xico D.F. 07000, M&eacute;xico.</i></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2">Recibido el 16 de julio de 2002.    ]]></body>
<body><![CDATA[<br> 	Aceptado el 6 de noviembre de 2002.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>  	    <p align="justify"><font face="verdana" size="2">Presentamos un nuevo m&eacute;todo para calcular la fuerza termoelectromotriz en semiconductores bipolares dentro de la aproximaci&oacute;n lineal a la teor&iacute;a, tomando en cuenta los portadores de carga fuera del equilibrio generados en la muestra tras aplicar un campo de temperatura. Por primera vez se define con precisi&oacute;n cu&aacute;les son los portadores de carga fuera del equilibrio y c&oacute;mo debe escribirse la ecuaci&oacute;n de Poisson para tomarlos en cuenta. Tambi&eacute;n por primera vez se tom&oacute; en cuenta el t&eacute;rmino proporcional al cambio de temperatura local producido por el gradiente de temperatura aplicado en la expresi&oacute;n para la recombinaci&oacute;n volum&eacute;trica para calcular la fuerza termoelectromotriz, dando por resultado que &eacute;sta y la resistencia del semiconductor dependen no s&oacute;lo de los par&aacute;metros tradicionales como las conductividades el&eacute;ctricas y potencias termoel&eacute;ctricas de electrones y huecos, sino tambi&eacute;n de las tasas de recombinaci&oacute;n volum&eacute;trica y superficial.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Descriptores:</b> Fuerza termoelectromotriz (Termo&#45;fem); efecto Seebeck; potencia termoel&eacute;ctrica; fen&oacute;menos de contacto entre metal y semiconductor; tasas de recombinaci&oacute;n; condici&oacute;n de cuasineutralidad.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>  	    <p align="justify"><font face="verdana" size="2">We present a new method for calculating the thermoelectromotive force in bipolar semiconductors within the linear approximation to the theory, taking into account the non&#45;equilibrium charge carriers generated in the sample when the temperature field is applied. For the first time it is precisely defined which are the non&#45;equilibrium charge carriers and how to write the Poisson equation to take them into account. For the first time it is taken into account the term that is proportional to the local change in temperature produced by the gradient of temperature, in the expression for the recombination rate to calculate the thermoelectromotive force given the result that this and the semiconductor's resistance do not depend solely on traditional parameters such as electric conductivities and thermoelectric powers of electrons and holes, but do depend also on surface and bulk recombination rates as well.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Keywords:</b> Thermoelectromotive force (Termo&#45;emf); Seebeck effect; Thermoelectric power; contact phenomena between metal and semiconductor; recombination rates; quasineutrality condition.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">PACS: 72.20.Pa; 73.40.Cg; 73.40.Lq;73.50.Lw;73.50.Gr</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><a href="../pdf/rmf/v49n2/v49n2a3.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Referencias</b></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">1.&nbsp;Yu.G. Gurevich, O.Yu. Titov, G.N. Logvinov y O.I. Lyubimov, <i>Phys. Rev. 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