Abstract
Abstract The elastic constants of single crystals of HgTe have been obtained between 2K and 320K from measurements of ultrasonic wave velocities by the pulse superposition technique. Particular attention has been paid to estimation of the overall uncertainty in the elastic constants. At 298K in units of 1012+ dyne cm−2C11 = 0.5361 ± 0.0023, C12 = 0.3660 ± 0.0030 and C44 = 0.2123 ± 0.0009. The Debye temperature is 141.5K. The temperature dependences of the elastic constants have been fitted by an anharmonic oscillator model. The force constants and effective charge have been obtained using a rigidion model. To complete the description of the elastic behaviour, the particle displacement and energy-flux vectors and cross-sections of the Young's modulus and wave velocity surfaces have been compiled.
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