GaInAsSb - Gallium Indium Arsenide Antimonide

Mechanical properties, elastic constants, lattice vibrations

Basic Parameter
Elastic constants
Micro Hardness
Acoustic Wave Speeds
Phonon frequencies

Basic Parameter

    Remarks Referens
Bulk modulus 5.7·1011 dyn cm-2 300 K; compositions lattice-matched to GaSb Mikhailova M.P. (1999)
  5.8·1011 dyn cm-2 300 K; compositions lattice-matched to InAs.  
Debye temperature ~270 K 300 K; compositions lattice-matched
to GaSb and InAs		  
Density (5.69-0.08x) g cm-3
[5.32 (GaAs)÷5.77(InSb) g cm-3]		 300 K; compositions lattice-matched to GaSb.  
Melting point, Tm ~= 1100° C    
Specific heat ~0.25 J g-1°C -1 300K  
Hardness on the Mohs scale between 3.8 and 5    
Surface microhardness (using Knoop's pyramid test) 220(InAs) -- 750(GaAs) kg mm-2    

Elastic constants at 300 K

for compositions lattice-matched to GaSb

C11= (8.19 + 0.64x)·1011 dyn cm-2
C12= (4.46 - 0.44x)·1011 dyn cm-2
C44= (3.89 + 0.43x) ·1011 dyn cm-2


for compositions lattice-matched to GaSb

C11= (8.34 + 0.73x)·1011 dyn cm-2
C12= (4.54 - 0.42x)·1011 dyn cm-2
C44= (3.95 + 0.50x) ·1011 dyn cm-2

For T=300 K

  For compositions
lattice-matched to Gasb		 For compositions
lattice-matched to InAs
Bulk modulus (compressibility-1) Bs= ~5.7·1011dyn cm-2 Bs= ~5.8·1011dyn cm-2
Shear modulus C'= (1.86 + 0.54x)·1011dyn cm-2 C'= (1.9 + 0.57x)·1011dyn cm-2
[100] Young's modulus Yo= (5.04 + 1.27x)·1011dyn cm-2 Yo= (5.14 + 1.35x)·1011dyn cm-2
[100] Poisson ratio σo = 0.35 - 0.04x σo = 0.35 - 0.04x

Micro Hardness

In1-xGaxAs0.9Sb0.1. Micro hardness (Hv) and energy gap values Eg vs composition of three alloy systems:
(1, 2) - In1-xGaxAs ;
(3, 4) - In1-xGaxAs0.9Sb0.1
(5, 6) - InAs1-x-0.1Sb0.1Py .
Measured using (111) oriented epilayers at 50 g weight (stress) on Vikkers pyramid
B.A.Matveev et al.   Izv.Akad.Nauk SSSR, Neorg.Mater, 26 (1990), 639
Contact authors: B.A.Matveev

 

Acoustic Wave Speeds

Wave propagation Direction Wave character Expression for wave speed Wave speed (in units of 105 cm/s) for compositions lattice-matched to GaSb Wave speed (in units of 105 cm/s) for compositions lattice-matched to InAs
[100] VL (C11/ρ )1/2 3.79 + 0.18x 3.83 + 0.2x
VT (C44/ρ)1/2 2.61 + 0.16x 2.64 + 0.17x
[110] Vl [(C11+Cl2+2C44)/2ρ]1/2 4.23 + 0.15x 4.28 + 0.17x
Vt|| Vt||=VT=(C44/ρ)1/2 2.64 + 0.17x 2.61 + 0.16x
Vt⊥ [(C11-C12)/2ρ]1/2 1.81 + 0.26x 1.83 + 0.27x
[111] Vl' [(C11+2C12+4C44)/3ρ]1/2 4.36 + 0.14x 4.41 + 0.16x
Vt' [(C11-C12+C44)/3ρ]1/2 2.11 + 0.22x 2.13 + 0.24x

Phonon frequencies

GaxIn1-xAsySb1-yAs. Frequencies of the LO and TO phonons vs. composition x for y=1-x.
The solid curves represent the calculated results using the modifed REI model.
(Jaw et al.[1989]).
GaxIn1-xAsySb1-yAs. Frequencies of the LO and TO phonons vs. x for y=1.48 -x.
The solid curves represent the calculated results using the modifed REI model.
(Jaw et al.[1989]).