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qcl:input_file [2022/04/28 16:55] takuma.sato |
qcl:input_file [2023/01/05 10:07] (current) thomas.grange [Scattering processes] |
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| === Optical phonons === | === Optical phonons === | ||
| - | (optional) Sometimes it might be useful to investigate the influence of the longitudinal-optical (LO) phonon interaction in more detail. | + | (optional) Sometimes it might be useful to investigate the influence of the longitudinal-optical (LO) phonon interaction on the full NEGF simulation. |
| - | Then one can artificially tune the coupling strength due to LO phonons. | + | Then one can artificially tune the LO-phonon scattering rates (self-energies in practice, or equivalently the square of the coupling to LO-phonons). |
| - | The microscopic value of the LO phonon coupling strength is then multiplied by the scaling factor ''<LO_Phonon_Coupling_Strength>''. | + | The microscopic value of the square of the LO phonon matrix element is then multiplied by the scaling factor ''<LO_Phonon_Coupling_Strength>''. |
| <code> | <code> | ||
| <Tune_LO_Phonon_Scattering>yes</Tune_LO_Phonon_Scattering> | <Tune_LO_Phonon_Scattering>yes</Tune_LO_Phonon_Scattering> | ||
| Line 428: | Line 428: | ||
| <!-- 1.0 is the value of the normal calculation --> | <!-- 1.0 is the value of the normal calculation --> | ||
| </code> | </code> | ||
| + | A value of 1.0 will have no effect, while larger (smaller) values will increase (decrease) the LO-phonon self-energy proportionally respectively. | ||
| === Charged impurities === | === Charged impurities === | ||
| Line 481: | Line 482: | ||
| <Alloy_scattering>yes</Alloy_scattering> | <Alloy_scattering>yes</Alloy_scattering> | ||
| <Tune_Alloy_scattering>0.5</Tune_Alloy_scattering> | <Tune_Alloy_scattering>0.5</Tune_Alloy_scattering> | ||
| - | </Scattering> | ||
| </code> | </code> | ||
| Line 499: | Line 499: | ||
| </code> | </code> | ||
| A value of 1.0 gives the normal calculation. | A value of 1.0 gives the normal calculation. | ||
| + | |||
| + | <code> | ||
| + | </Scattering> | ||
| + | </code> | ||
| ==== Poisson equation ==== | ==== Poisson equation ==== | ||
| The electrostatic mean-field interactions (electron-electron and electron-impurities interactions) can be switched on/off by using ''yes'' or ''no'' in the ''<Poisson>'' command. | The electrostatic mean-field interactions (electron-electron and electron-impurities interactions) can be switched on/off by using ''yes'' or ''no'' in the ''<Poisson>'' command. | ||
| Line 513: | Line 517: | ||
| <code> | <code> | ||
| - | <Material_for_lateral_motion>well</Material_for_lateral_motion> | ||
| <Lateral_motion> | <Lateral_motion> | ||
| + | <Material_for_lateral_motion>well</Material_for_lateral_motion> | ||
| <Value unit="meV">5</Value> | <Value unit="meV">5</Value> | ||
| </Lateral_motion> | </Lateral_motion> | ||
| Line 701: | Line 705: | ||
| In the case of a combined temperature-voltage sweep, the value of the last calculated bias value below threshold bias is used as a starting point of the following bias sweep at the next temperature. | In the case of a combined temperature-voltage sweep, the value of the last calculated bias value below threshold bias is used as a starting point of the following bias sweep at the next temperature. | ||
| - | |||
| - | ==== Electromagnetic modes ==== | ||
| - | To be documented | ||
| - | |||
| - | <code> | ||
| - | <EMField> | ||
| - | <EMMode> </EMMode> | ||
| - | </EMField> | ||
| - | </code> | ||
qcl/input_file.1651164936.txt.gz · Last modified: 2022/04/28 16:55 by takuma.sato
