Non-Γ donor levels and kinetics of electron transfer in n-type CdTe

Probing the magnetic ground state of theDX−center inCd1−xMnxGiblin1, Terry2, Read3 et al. 2006Phys. Rev. B2010View full textAdd to dashboardCite

“…The CMT samples were doped with either indium or aluminum atoms as the former dopant has been shown to form DX-like centers 22,23 while the latter is expected to behave only as a shallow donor level. 9,23 We show that the implantation of positively charged muons, which are local probes of magnetism, is affected by the presence of these deep centers. Moreover, the SR data provide strong evidence for the diamagnetic nature of the ground state of the defect, and for the possible existence of multiple DX centers.…”

“…DX-like centers have also been demonstrated to exist in the II-VI compound CdTe, doped with donors from groups III and VII, both under hydrostatic pressure 9 and when alloyed with zinc. 10,11 More recently, it was shown that donor-doped CdTe alloyed with manganese 12,13 also exhibited the characteristic persistent photoconductivity of a DX-like system.…”

Spatial Correlations of Donor Charges in MBE CdTe

“…Indium donor in CdTe crystal introduces the localized level lying about 125 meV above the bottom of the conduction band [1,2]. Application of hydrostatic pressure induces an upward shift of the localized level and of the conduction band (CB) minimum.…”

“…Application of hydrostatic pressure induces an upward shift of the localized level and of the conduction band (CB) minimum. Due to the higher value of the CB pressure coefficient the Fermi level approaches In related level and if temperature is not lower than about 90-100 K and at elevated pressures the impurities start to capture free electrons [1,2]. As a result the donor charge state changes.…”

Hydrostatic Pressure Study of MBE CdMnTe Doped with Bromine

“…The experimental data were analysed using positive and negative U model of the Br centres. We found that both models could reproduce the experimental points, but in the case of positive U modelonly under assumption that the sample was ckpletely unckpensated.PACS numbers: 71.55.Gs, 73.61.GaIt is known that halogen impurities in CdTe and CdTe-based ternary semiconduction create metastable centres [1][2][3][4][5][6]. Hydrostatic pressure experiments showed that in the case of CdTe these centres introduce localized levels resonant with the conduction band.…”