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the_tip_structure [2009/11/26 11:06]
vroz
the_tip_structure [2011/02/18 13:13] (current)
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 The "​tip_e_str.inp"​ file contains informations about the density of states of the tip. Than we need to run the **FIREBALL** code with the following settings of "​fireball.in"​ file: The "​tip_e_str.inp"​ file contains informations about the density of states of the tip. Than we need to run the **FIREBALL** code with the following settings of "​fireball.in"​ file:
 +
 +__&​OPTION__ part
 +
 +‐ basisfile = <​filename>​ \\
 +‐ lvsfile = <​filename>​ \\
 +‐ kptpreference = <​filename>​ \\
 +‐ nstepf = 1 \\
 +- ifixcharge= 1 \\
 +
 +__&​OUTPUT__ part
 +
 +- iwrtdos = 1
 +
 +For running the DOS computation we need even "​dos.optional"​ file with the DOS settings. The file could looks like this:
 +
 +  1.0                     ! scale factor of coord 
 +  1 5                 ! natom_beg, natom_end for dos calculation ​
 +  41                      ! number of energy steps 
 +  -3.8  0.05              ! first energy and step for dos calculation ​
 +  1                       ! 1/0 yes/no write the tip_e_str.inp ​
 +  -3.5  -2.0              ! minimun and maximum energies for the writting the tip
 +  0.05                    ! (eta) imaginary part for green functionin calculation ​
 +
 +The result is list of files with the densities and charges of single atoms of the tip (1-5) and the "​tip_e_str.inp file"
 +
 + \\
  
 ==== The tip_g_str.inp file ==== ==== The tip_g_str.inp file ====
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 apex atom at first position. The file could looks like this: \\ apex atom at first position. The file could looks like this: \\
  
-1 5 ! natoms_tip_contributing,​ natoms_tip  +  ​1 5 ! natoms_tip_contributing,​ natoms_tip  
-0.000000 0.000000 0.400000 1 9 ! x, y, z, atomic type, # of orbitals  +  0.000000 0.000000 0.400000 1 9     ​! x, y, z, atomic type, # of orbitals  
-1.590800 1.590800 1.590800 1 9 ! x, y, z, atomic type, # of orbitals ​\\ +  1.590800 1.590800 1.590800 1 9     ​! x, y, z, atomic type, # of orbitals  
-1.590800 ‐1.59080 1.59080 1 9 ! x, y, z, atomic type, # of orbitals ​\\ +  1.590800 ‐1.59080 1.59080 1 9      ! x, y, z, atomic type, # of orbitals  
-‐1.590800 1.59080 1.59080 1 9 ! x, y, z, atomic type, # of orbitals ​\\ +  ‐1.590800 1.59080 1.59080 1 9      ! x, y, z, atomic type, # of orbitals  
-‐1.590800 ‐1.59080 1.59080 1 9 ! x, y, z, atomic type, # of orbitals ​\\ +  ‐1.590800 ‐1.59080 1.59080 1 9     ​! x, y, z, atomic type, # of orbitals  
-3 ! number of shells in each type of atom \\ +                                   ! number of shells in each type of atom  
-0 1 2 ! l for each shell in atom type=1 ​\\ +  0 1 2                              ! l for each shell in atom type=1  
-‐2.0 4.0 81 ! energy initial, range and steps in dos file \\+  ‐2.0 4.0 81                        ! energy initial, range and steps in dos file 
  
-// But be carefull, the energy in the STM code is related to the Fermi level. When Fermi level is -2 eV from FIREBALL in the "​tip_g_str.inp"​ in it's last line the first value has to be 0.0 (energy initial - Fermi level)//+But be carefull, the energy in the STM code is related to the Fermi level. When Fermi level is -2 eV from FIREBALL in the "​tip_g_str.inp"​ in it's last line the first value has to be 0.0 (energy initial - Fermi level)//
the_tip_structure.1259230016.txt.gz · Last modified: 2011/02/18 13:14 (external edit)