src/material/S-SiO2/SiO2S_mob_Constant.cc

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*              8888888         88888888         88888888                    */
   4 /*            8                8                8                            */
   5 /*           8                 8                8                            */
   6 /*           8                  88888888         88888888                    */
   7 /*           8      8888                8                8                   */
   8 /*            8       8                 8                8                   */
   9 /*              888888         888888888        888888888                    */
  10 /*                                                                           */
  11 /*       A Two-Dimensional General Purpose Semiconductor Simulator.          */
  12 /*                                                                           */
  13 /*  GSS material database Version 0.4                                        */
  14 /*  Last update: Feb 17, 2006                                                */
  15 /*                                                                           */
  16 /*  Gong Ding                                                                */
  17 /*  gdiso@ustc.edu                                                           */
  18 /*  NINT, No.69 P.O.Box, Xi'an City, China                                   */
  19 /*                                                                           */
  20 /*****************************************************************************/
  21 //
  22 // Material Type: SiO2 as semicondcutor
  23
  24
  25 #include "PMI.h"
  26
  27 class GSS_Mob_Constant : public PMIS_Mobility
  28 {
  29 private:
  30   // parameters for constant mobility
  31   PetscScalar mumaxn ;
  32   PetscScalar mumaxp ;
  33   PetscScalar Exponentn ;
  34   PetscScalar Exponentp ;
  35   PetscScalar T0;
  36   void Mob_Constant_Init()
  37   {
  38     mumaxn = 0.05*cm*cm/V/s;
  39     mumaxp = 4.7050e+02*cm*cm/V/s;
  40     Exponentn = 2.5;
  41     Exponentp = 2.2;
  42     T0 = 300*K;
  43   }
  44
  45 public:
  46   //---------------------------------------------------------------------------
  47   // Electron mobility
  48   PetscScalar ElecMob(const PetscScalar &p, const PetscScalar &n, const PetscScalar &Tl,
  49                       const PetscScalar &Ep, const PetscScalar &Et, const PetscScalar &Tn) const
  50   {
  51      return mumaxn*pow(Tl/T0,-Exponentn);
  52   }
  53   AutoDScalar ElecMob(const AutoDScalar &p, const AutoDScalar &n, const AutoDScalar &Tl,
  54                       const AutoDScalar &Ep, const AutoDScalar &Et, const AutoDScalar &Tn) const
  55   {
  56      return mumaxn*pow(Tl/T0,-Exponentn);
  57   }
  58
  59   //---------------------------------------------------------------------------
  60   // Hole mobility
  61   PetscScalar HoleMob (const PetscScalar &p, const PetscScalar &n, const PetscScalar &Tl,
  62                        const PetscScalar &Ep, const PetscScalar &Et, const PetscScalar &Tp) const
  63   {
  64      return mumaxp*pow(Tl/T0,-Exponentp);
  65   }
  66   AutoDScalar HoleMob(const AutoDScalar &p, const AutoDScalar &n, const AutoDScalar &Tl,
  67                       const AutoDScalar &Ep, const AutoDScalar &Et, const AutoDScalar &Tp) const
  68   {
  69      return mumaxp*pow(Tl/T0,-Exponentp);
  70   }
  71
  72 // constructor
  73 public:
  74   GSS_Mob_Constant(const PMIS_Environment &env):PMIS_Mobility(env)
  75   {
  76     Mob_Constant_Init();
  77   }
  78
  79
  80   ~GSS_Mob_Constant()
  81   {
  82   }
  83
  84 }
  85 ;
  86
  87 /*---------------------------------------------------------------
  88  *  the interface function called by material databse controller
  89  */
  90 extern "C"
  91 {
  92   PMIS_Mobility* PMIS_SiO2S_Mob_Default (const PMIS_Environment& env)
  93   {
  94     return new GSS_Mob_Constant(env);
  95   }
  96 }