Investigation of photoconductivity in n-type Galium doped PbTe

D. Stojanovic; N. Romcevic; J. Trajic; B. Hadzic; M. Romcevic; D.R. Khokhlov

doi:10.2298/sos0702169s

Investigation of photoconductivity in n-type Galium doped PbTe

Science of Sintering ◽

10.2298/sos0702169s ◽

2007 ◽

Vol 39 (2) ◽

pp. 169-175

Author(s):

D. Stojanovic ◽

N. Romcevic ◽

J. Trajic ◽

B. Hadzic ◽

M. Romcevic ◽

...

Keyword(s):

Transport Process ◽

Correlation Energy ◽

Mixed Valence ◽

Kinetic Equations ◽

Lead Telluride ◽

Persistent Photoconductivity ◽

Impurity States ◽

Negative Correlation Energy ◽

The Mathematical Model ◽

Calculated Temperature Dependence

Persistent photoconductivity at low temperature in PbTe + 0.4 at.% Ga has been investigated using kinetic equations which describe the transport process on DX-like impurity centers. Measured and calculated photoconductivity as a function of illumination and temperature is presented. Experimental results are interpreted assuming the mixed valence of Ga in lead telluride and the formation of centers with negative correlation energy. Numeric values of the mathematical model constant at steady state are calculated by comparing the measured and calculated temperature dependence of the resistivity and carrier concentrations for illuminated and unilluminated n-type samples. Thus, the positions and concentrations of different impurity states are determined. .

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Mixed-valence impurities in lead telluride-based solid solutions

Physics-Uspekhi ◽

10.1070/pu2002v045n08abeh001146 ◽

2002 ◽

Vol 45 (8) ◽

pp. 819-846 ◽

Cited By ~ 132

Author(s):

Boris A Volkov ◽

Ludmila I Ryabova ◽

Dmitrii R Khokhlov

Keyword(s):

Solid Solutions ◽

Mixed Valence ◽

Lead Telluride

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On Fermi level pinning in lead telluride based alloys doped with mixed valence impurities

Materials Science and Engineering B ◽

10.1016/s0921-5107(01)01029-7 ◽

2002 ◽

Vol 91-92 ◽

pp. 416-420 ◽

Cited By ~ 16

Author(s):

E.P. Skipetrov ◽

E.A. Zvereva ◽

O.S. Volkova ◽

E.I. Slyn'ko ◽

A.M. Mousalitin

Keyword(s):

Fermi Level ◽

Mixed Valence ◽

Lead Telluride ◽

Fermi Level Pinning

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Experimental evidence for negative correlation energy and valence alternation in amorphous selenium

Physical Review B ◽

10.1103/physrevb.56.r485 ◽

1997 ◽

Vol 56 (2) ◽

pp. R485-R488 ◽

Cited By ~ 32

Author(s):

A. V. Kolobov ◽

M. Kondo ◽

H. Oyanagi ◽

R. Durny ◽

A. Matsuda ◽

...

Keyword(s):

Experimental Evidence ◽

Negative Correlation ◽

Correlation Energy ◽

Amorphous Selenium ◽

Negative Correlation Energy

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VERTEX CORRECTIONS IN THE NUCLEAR SCHWINGER–DYSON FORMALISM

International Journal of Modern Physics E ◽

10.1142/s0218301302000843 ◽

2002 ◽

Vol 11 (04) ◽

pp. 321-333 ◽

Cited By ~ 1

Author(s):

MASAHIRO NAKANO ◽

HIROYUKI MATSUURA ◽

TAISUKE NAGASAWA ◽

KEN-ICHI MAKINO ◽

NOBUO NODA ◽

...

Keyword(s):

Field Theory ◽

Correlation Energy ◽

Mean Field Theory ◽

Mean Field ◽

The Other ◽

Vertex Correction ◽

Hartree Fock ◽

Vertex Corrections ◽

Negative Correlation Energy ◽

Self Consistent

We develop the Nuclear Schwinger–Dyson (NSD) formalism to include the effects of ladder diagrams by modifying the vertex. In this extension, the NSD equation sums up both ring diagrams and ladder diagrams self-consistently. The results are compared with mean field theory, Hartree Fock and bare-vertex NSD calculations. It is shown that the vertex correction is important from the following viewpoints. First, the vertex correction greatly modifies the meson propagators, and we can avoid the ghost-pole from meson propagators in a self-consistent way. Secondly, it gives a large negative correlation-energy compared with the other calculations; as a result, it gives a softer equation of state which is preferable according to the experimental data.

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