Spin-orbit coupling in a Ni monolayer: Difference between revisions

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{{Template:Magnetism}}
{{Template:Magnetism}}


Description: Spin-orbit coupling (SOC) in a freestanding Ni monolayer.
== Task ==
 
Spin-orbit coupling (SOC) in a freestanding Ni monolayer.
 
== Input ==
 
=== {{TAG|POSCAR}} ===
<pre>
fcc Ni 100 surface
3.53
  .50000  .50000  .00000
  -.50000  .50000  .00000
  .00000  .00000  5.00000
  1
Cartesian
  .00000  .00000  .00000
</pre>
 
=== {{TAG|INCAR}} ===


----
*{{TAG|INCAR}}
  {{TAGBL|SYSTEM}}        = Ni (100) monolayer
  {{TAGBL|SYSTEM}}        = Ni (100) monolayer
  {{TAGBL|ISTART}}        = 0
  {{TAGBL|ISTART}}        = 0
Line 15: Line 31:
  {{TAGBL|LMAXMIX}}      = 4
  {{TAGBL|LMAXMIX}}      = 4


*{{TAG|KPOINTS}}
*Initialization of moment along z-direction (out of plane) ({{TAG|MAGMOM}} = 0.0 0.0 1.0).
*Spin-orbit interaction switched on ({{TAG|LSORBIT}}=''.TRUE.'').
*For the second calculation, switch to in-plane magnetization by setting {{TAG|MAGMOM}} = 1.0 0.0 0.0 in the {{TAG|INCAR}} file.
 
=== {{TAG|KPOINTS}} ===
<pre>
<pre>
k-points
k-points
Line 24: Line 44:
</pre>
</pre>


*{{TAG|POSCAR}}
== Calculation ==
<pre>
 
fcc Ni 100 surface
*The sample output for the total energy using out of plane magnetization is given in the {{TAG|OSZICAR}} file:
  3.53
...
   .50000   .50000   .00000
  DAV:  20    -0.371322930070E+01   0.15852E-03   -0.11632E-03  636   0.235E-01    0.225E-02
   -.50000   .50000   .00000
DAV:  21    -0.371323204989E+01   -0.27492E-05   -0.13047E-05   500  0.184E-02
   .00000   .00000 5.00000
    1 F= -.37132320E+01 E0= -.37139803E+01  d E =0.224478E-02  mag=  0.0000  0.0000  0.9035
   1
*The sample output for the total energy using in plane magnetization looks like the following:
Cartesian
...
  .00000   .00000   .00000
DAV:  19   -0.371443443024E+01   -0.80757E-04  -0.35822E-03 1084  0.323E-01    0.119E-02
</pre>
DAV:  20    -0.371446032472E+01   -0.25894E-04   -0.42423E-05  916   0.263E-02
    1 F= -.37144603E+01 E0= -.37150300E+01  d E =0.170900E-02  mag=  0.9049  0.0000  0.0000
 
*From the energy difference of these calculations we see that the easy axis lies in plane:
<math>E_{\textrm{MAE}}=E(m_{\perp})-E(m_{\parallel})=1.2 \, \textrm{meV}</math>


== Download ==
== Download ==
[http://www.vasp.at/vasp-workshop/examples/4_4_SOI_Ni.tgz 4_4_SOI_Ni.tgz]
[[Media:4 4 SOI Ni.tgz| 4_4_SOI_Ni.tgz]]
----
[[VASP_example_calculations|To the list of examples]] or to the [[The_VASP_Manual|main page]]
{{Template:Magnetism}}


[[Category:Examples]]
[[Category:Examples]]

Latest revision as of 14:18, 14 November 2019

Task

Spin-orbit coupling (SOC) in a freestanding Ni monolayer.

Input

POSCAR

fcc Ni 100 surface
 3.53
   .50000   .50000   .00000
  -.50000   .50000   .00000
   .00000   .00000  5.00000
  1
Cartesian
   .00000   .00000   .00000

INCAR

SYSTEM        = Ni (100) monolayer
ISTART        = 0
ENCUT         = 270.00
LNONCOLLINEAR = .TRUE.
MAGMOM        = 0.0 0.0 1.0
VOSKOWN       = 1
LSORBIT       = .TRUE.
    
LMAXMIX       = 4
  • Initialization of moment along z-direction (out of plane) (MAGMOM = 0.0 0.0 1.0).
  • Spin-orbit interaction switched on (LSORBIT=.TRUE.).
  • For the second calculation, switch to in-plane magnetization by setting MAGMOM = 1.0 0.0 0.0 in the INCAR file.

KPOINTS

k-points
 0
Monkhorst-Pack
9 9 1
0 0 0

Calculation

  • The sample output for the total energy using out of plane magnetization is given in the OSZICAR file:
...
DAV:  20    -0.371322930070E+01    0.15852E-03   -0.11632E-03   636   0.235E-01    0.225E-02
DAV:  21    -0.371323204989E+01   -0.27492E-05   -0.13047E-05   500   0.184E-02
   1 F= -.37132320E+01 E0= -.37139803E+01  d E =0.224478E-02  mag=  0.0000  0.0000  0.9035
  • The sample output for the total energy using in plane magnetization looks like the following:
...
DAV:  19    -0.371443443024E+01   -0.80757E-04   -0.35822E-03  1084   0.323E-01    0.119E-02
DAV:  20    -0.371446032472E+01   -0.25894E-04   -0.42423E-05   916   0.263E-02
   1 F= -.37144603E+01 E0= -.37150300E+01  d E =0.170900E-02  mag=  0.9049  0.0000  0.0000
  • From the energy difference of these calculations we see that the easy axis lies in plane:

Download

4_4_SOI_Ni.tgz

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