src/material/InSb/InSb_gen.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: InSb
  23
  24 #include "PMI.h"
  25
  26 class GSS_InSb_Avalanche : public PMIS_Avalanche
  27 {
  28 private:
  29
  30   PetscScalar a_n;
  31   PetscScalar a_p;
  32   PetscScalar b_n;
  33   PetscScalar b_p;
  34   PetscScalar hbarOmega;
  35   PetscScalar T300;
  36
  37   void  Avalanche_Init()
  38   {
  39     //use the parameters for InAs.
  40     a_n = 8.6000e+06/cm ;
  41     a_p = 2.3000e+07/cm ;
  42     b_n = 3.5000e+06*V/cm ;
  43     b_p = 6.4000e+05*V/cm ;
  44     hbarOmega   = 1.0000e+03*eV;
  45     T300 = 300*K;
  46     //experiment data: gn(F) = 126¡¤F^2¡¤exp(F/160) (s-1),
  47     //should be implemented later
  48   }
  49 public:
  50   //---------------------------------------------------------------------------
  51   // Electron Impact Ionization rate for DDM
  52   PetscScalar ElecGenRate (const PetscScalar &Tl,const PetscScalar &Ep,const PetscScalar &Eg) const
  53   {
  54     if (Ep < 1*V/cm)
  55     {
  56       return 0;
  57     }
  58     else
  59     {
  60       PetscScalar gamma = tanh(hbarOmega/(2*kb*T300)) / tanh(hbarOmega/(2*kb*Tl));
  61       return gamma*a_n*exp(-b_n*gamma/Ep);
  62     }
  63   }
  64   AutoDScalar ElecGenRate (const AutoDScalar &Tl,const AutoDScalar &Ep,const AutoDScalar &Eg) const
  65   {
  66     if (Ep < 1*V/cm)
  67     {
  68       return 0;
  69     }
  70     else
  71     {
  72       AutoDScalar gamma = tanh(hbarOmega/(2*kb*T300)) / tanh(hbarOmega/(2*kb*Tl));
  73       return gamma*a_n*exp(-b_n*gamma/Ep);
  74     }
  75   }
  76
  77   //---------------------------------------------------------------------------
  78   // Hole Impact Ionization rate for DDM
  79   PetscScalar HoleGenRate (const PetscScalar &Tl,const PetscScalar &Ep,const PetscScalar &Eg) const
  80   {
  81     if (Ep < 1*V/cm)
  82     {
  83       return 0;
  84     }
  85     else
  86     {
  87       PetscScalar gamma = tanh(hbarOmega/(2*kb*T300)) / tanh(hbarOmega/(2*kb*Tl));
  88       return gamma*a_p*exp(-b_p*gamma/Ep);
  89     }
  90   }
  91   AutoDScalar HoleGenRate (const AutoDScalar &Tl,const AutoDScalar &Ep,const AutoDScalar &Eg) const
  92   {
  93     if (Ep < 1*V/cm)
  94     {
  95       return 0;
  96     }
  97     else
  98     {
  99       AutoDScalar gamma = tanh(hbarOmega/(2*kb*T300)) / tanh(hbarOmega/(2*kb*Tl));
 100       return gamma*a_p*exp(-b_p*gamma/Ep);
 101     }
 102   }
 103
 104
 105   //---------------------------------------------------------------------------
 106   // Electron Impact Ionization rate for EBM
 107   PetscScalar ElecGenRateEBM (const PetscScalar &Tn,const PetscScalar &Tl,const PetscScalar &Eg) const
 108   {
 109     return 0;
 110   }
 111   AutoDScalar ElecGenRateEBM (const AutoDScalar &Tn,const AutoDScalar &Tl,const AutoDScalar &Eg) const
 112   {
 113     return 0;
 114   }
 115
 116   //---------------------------------------------------------------------------
 117   // Hole Impact Ionization rate for EBM
 118   PetscScalar HoleGenRateEBM (const PetscScalar &Tp,const PetscScalar &Tl,const PetscScalar &Eg) const
 119   {
 120     return 0;
 121   }
 122   AutoDScalar HoleGenRateEBM (const AutoDScalar &Tp,const AutoDScalar &Tl,const AutoDScalar &Eg) const
 123   {
 124     return 0;
 125   }
 126
 127
 128
 129 //----------------------------------------------------------------
 130 // constructor and destructor
 131 public:
 132   GSS_InSb_Avalanche(const PMIS_Environment &env):PMIS_Avalanche(env)
 133   {
 134     Avalanche_Init();
 135   }
 136   ~GSS_InSb_Avalanche()
 137   {
 138   }
 139
 140 }
 141 ;
 142
 143 extern "C"
 144 {
 145   PMIS_Avalanche* PMIS_InSb_Avalanche_Default (const PMIS_Environment& env)
 146   {
 147     return new GSS_InSb_Avalanche(env);
 148   }
 149 }