Surface modification of indium phosphide by 100 MeV iron ions

Raman characterization of phonon confinement and strain effects from latent ion tracks in α‐quartz

“…The broadening behavior is related to the atomic disorder added to the samples. [5,6,[15][16][17] This disorder is caused by radiation damage produced during the passage of the incident ion through the crystal structure. [58] The broadening and peak shifting can also be related to the relaxation of the wave vector selection rules or, equivalently, to the reduction of the correlation length of the phonon modes.…”

“…[9,10,[12][13][14] Confinement effects have been observed in structurally modified single crystals and polycrystals. [5,6,[15][16][17] Ionizing radiation, for example, can produce disorder in a crystal through the introduction of defects such as ion tracks, voids, phase precipitates, and dislocations. [18,19] When disorder is introduced, the correlation length of the phonons is reduced as the wave vector selection rule is relaxed.…”

Evidence of defect‐annealing effect in swift heavy‐ion‐irradiated indium phosphide

“…In addition, the SHI irradiations result in the shift of the phonon peaks in InP Raman spectra, and the strain induced in the crystal is calculated according to the phonon confinement model (PCM), which indirectly suggests that the amorphous occurred in the irradiated InP. [18,19] The transmission electron microscope (TEM) measurement is directly to obtain the damages such as tracks and disorders, whereas Raman spectroscopy as a complementary technique could detect short-range (atomic scale) disorders and small concentrations of defects. [20,21] Although the previous works focus on the formation of latent tracks by TEM or the modification of Raman phonon modes induced by irradiation, these two methods have not been combined well to understand the radiation effect in InP.…”

A potential lattice damage scale in swift heavy ion irradiated InP

“…As reported by Dubey, an average crystallite size of the InP samples irradiated with 100‐MeV iron‐ions was obtained by analyzing Raman spectra, and it was found to decreased with increasing ion fluence. [ 17,18 ] According to phonon confinement model, the phonon coherence length estimated was found to decrease with increasing depth of the InP samples irradiated with 200‐MeV Ag‐ions, indicating that the average crystallite size was also decreased with increasing depth, and the stress calculated from the Raman shift showed different amount of the stresses at different depth values. [ 19 ] In our previous work, the Raman results show that the stress induced in InP increased with increasing ion fluence after Bi ions irradiation.…”