Lattice Vibrations of Mg_xCd_1-xTe Mixed Crystals

Terahertz dynamics of lattice vibrations in Au/CdTe plasmonic crystals: Photoinduced segregation of Te and enhancement of optical response

“…However, none of the observed frequencies fit to the optical phonon energies at the Γ point of the Brillouin zone in Cd 0.86 Mg 0.14 Te. The optical phonon in this material which is the closest in energy to the measured values is the 4.2 THz (17.4 meV) CdTelike TO mode [26,34]. From the experiment it follows that for long exposure times the oscillation frequency approaches f 300K = 3.60 THz (14.9 meV) at T = 300 K and f 10K = 3.72 THz (15.4 meV) at T = 10 K which corresponds very well to the frequency of the symmetric A 1 breathing mode of Te with f Te,295K = 3.61 THz and f Te,4K = 3.73 THz [35].…”

Growth of MgTe and Cd1−xMgxTe thin films by molecular beam epitaxy

“…The high frequency dieleetrie eonstant of bulk MgTe has been found to be 3.7 (12], in contrast to 7.2 for CdTe and 5.9 for ZnSe [16].…”

“…The bulk propertics of MgTe as weil as those of the ternary alloys Cd, _xMgxTe and Zn,_x MgxTe have bcen studied by different groups [6][7][8][9][10][11][12][13][14][15]_ MgTe is hygroscopic, and the surfacc is very rapidly oxidized under standard environmental conditions. Chemical re action with water produces MgO and H 2 Tc.…”

“…For Cd 1 -x Mg.,Te, the critical Mg content is not known. In the past, bulk crystals have been fabricated with Mg contents of up to 60% without the above-mentioned chemical reaction [12]. Cd l_xMgxTe with Mg content above 60% has been found to crystallize in the wurtzite structure and between 30% and 65% various polytypes were obtained [12].…”

Structural Properties of Cd1-xMgxTe and Cd1-x-yMgxMnyTe Crystals

“…2, X-ray diffractions results for Cd1-xMgxΤe thin films fit better to our nominal Mg content dependence, at least for lower x values. One can explain this somewhat surprising coincidence, since Waag et al determined the x values for their thin films using the calibration curve for bulk Cd1-x MgxΤe taken from the literature available so far [7]. …”