Release notes of nextnano.NEGF

2022-06-13

  1. Units in LO-phonon scattering rates have been fixed.

  2. Now the license nnNEGF.lic is supported.

2022-04-29

  1. The in-plane nonparabolicity model introduced in the previous update has been fixed.

<Materials>
    ...
    <InPlaneNonParabolicity>yes</InPlaneNonParabolicity>
    ...
</Materials>
  1. The LO-phonon scattering rate output has been fixed.

2022-03-14

  1. Linear alloy grading is now possible:

<Layer> <!-- all the material parameters will be linearily interpolated between the <Material1> and the <Material2> -->
    <Material1>mat1</Material1>
    <Material2>mat2</Material2>
    <Thickness unit="nm">5.0</Thickness>
</Layer>

2. The in-plane nonparabolicity for multiband models can be activated with the command <InPlaneNonParabolicity>yes</InPlaneNonParabolicity> inside the block <Materials>...<\Materials>.

  1. In the 2- and 3-band models, nonparabolicity coefficient can be used as in input material parameter. If specified, it will be used to overwrite the k.p parameters.

<Material>
    <Name>In(x)Ga(1-x)As</Name>
    <Alloy_Composition>0.53</Alloy_Composition>
    <Alias>well</Alias>
    <Effective_mass_from_kp_parameters>no</Effective_mass_from_kp_parameters>
    <Overwrite>
        <NonParabolicity Unit="cm^2">1.5e-14</NonParabolicity>
    </Overwrite>
</Material>

4. The individual scattering rates of LO-phonon, alloy disorder and interface roughness can be output.