Spatial Correlations of Donor Charges in MBE CdTe

• Authors: T. Suski , P. Wiśniewski , E. Litwin-Staszewska , D. Wasik , J. Przybytek , M. Baj , G. Karczewski , T. Wojtowicz , A. Zakrzewski , J. Kossut
• Languages of publication: EN

Abstracts

EN

We present experimental evidence that at high pressures indium donors in CdTe localize electrons in spatially correlated manner. We have studied Hall mobility, μ_{H}, as a function of electron concentration, n_{H}, at T=77 K. Changes of n_{H} have been achieved by two methods. High pressure freeze-out of electrons onto localized states of In-donors leads to the mobility enhancement with respect to the situation when n_{H} has been modified by means of a subsequent annealing of the sample. As a result, depending on the degree of spatial correlations in the impurity charges arrangement, different values of μ_{H} correspond to the same value of n_{H}. The variation of mobility with electron concentration suggests that the localized state of In-donor represents likely negatively charged DX state.

Keywords

EN

72.80.Ey; 71.55.Gs

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1995
• Volume: 88
• Issue: 5
• Pages: 929-932

Dates

published

1995-11

Contributors

author

T. Suski

• Unipress, Polish Academy of Sciences, Sokołowska 29, 01-142 Warszawa, Poland

author

P. Wiśniewski

• Unipress, Polish Academy of Sciences, Sokołowska 29, 01-142 Warszawa, Poland

author

E. Litwin-Staszewska

• Unipress, Polish Academy of Sciences, Sokołowska 29, 01-142 Warszawa, Poland

author

D. Wasik

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warszawa, Poland

author

J. Przybytek

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warszawa, Poland

author

M. Baj

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warszawa, Poland

author

G. Karczewski

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland

author

T. Wojtowicz

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland

author

A. Zakrzewski

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland

author

J. Kossut

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland