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4.2.2 Mass Density

The reported value ranges of the mass densities of the three materials are summarized in Table 4.3. For GaN, AlN, and InN values of 6.15 g/cm$ ^3$, 3.23 g/cm$ ^3$, and 6.81 g/cm$ ^3$, respectively, are adopted. For the alloys a linear interpolation between the basic material values is used:

$\displaystyle \rho_\ensuremath{\mathrm{L}}^\ensuremath{\mathrm{ABC}}=(1-x)\rho_... ...ensuremath{\mathrm{AC}}+x\rho_\ensuremath{\mathrm{L}}^\ensuremath{\mathrm{BC}}.$ (4.65)


Table 4.3: Model parameters for the mass density [g/cm$ ^3$].
Material Range Used References
GaN 6.085$ -$6.15 6.15 [289,290]
AlN 3.23$ -$3.26 3.23 [176,291]
InN 6.81 6.81 [176]

next up previous contents
Next: 4.2.3 Thermal Conductivity Up: 4.2 Lattice and Thermal Previous: 4.2.1 Permittivity   Contents
S. Vitanov: Simulation of High Electron Mobility Transistors