University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Radiation-induced defect reactions in tin-doped Ge crystals

Markevich, VP, Peaker, AR, Hamilton, B, Litvinov, VV, Pokotilo, YM, Petukh, AN, Lastovskii, SB, Coutinho, J, Rayson, MJ and Briddon, PR (2011) Radiation-induced defect reactions in tin-doped Ge crystals Solid State Phenomena, 178-17. pp. 392-397.

Full text not available from this repository.


We have recently shown that Sn impurity atoms are effective traps for vacancies (V) in Ge:Sn crystals irradiated with MeV electrons at room temperature [V.P. Markevich etal., J. Appl. Phys. 109 (2011) 083705]. A hole trap with 0.19 eV activation energy for hole emission to the valence band (Eh) has been assigned to an acceptor level of the Sn-V complex. In the present work electrically active defects introduced into Ge:Sn+P crystals by irradiation with 6 MeV electrons and subsequent isochronal annealing in the temperature range 50-300 °C have been studied by means of transient capacitance techniques and ab-initio density functional modeling. It is found that the Sn-V complex anneals out upon heat-treatments in the temperature range 50-100 °C. Its disappearance is accompanied by the formation of vacancy-phosphorus (VP) centers. The disappearance of the VP defect upon thermal annealing in irradiated Sn-doped Ge crystals is accompanied by the effective formation of a defect which gives rise to a hole trap with Eh = 0.21 eV and is more thermally stable than other secondary radiation-induced defects in Ge:P samples. This defect is identified as tinvacancy- phosphorus (SnVP) complex. It is suggested that the effective interaction of the VP centers with tin atoms and high thermal stability of the SnVP complex can result in suppression of transient enhanced diffusion of phosphorus atoms in Ge. © (2011) Trans Tech Publications, Switzerland.

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Markevich, VP
Peaker, AR
Hamilton, B
Litvinov, VV
Pokotilo, YM
Petukh, AN
Lastovskii, SB
Coutinho, J
Briddon, PR
Date : 1 January 2011
DOI : 10.4028/
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:03
Last Modified : 24 Jan 2020 23:22

Actions (login required)

View Item View Item


Downloads per month over past year

Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800