JETP Letters

, Volume 97, Issue 9, pp 525–527 | Cite as

Influence of electric current and magnetic field on terahertz photoconductivity in Pb1 − x Sn x Te(In)

  • L. I. Ryabova
  • A. V. Nicorici
  • S. N. Danilov
  • D. R. Khokhlov
Condensed Matter

Abstract

Photoconductivity of Pb1 − x Sn x Te(In) solid solutions in the terahertz spectral range is defined by a new type of local electron states linked to the quasi-Fermi level. The paper deals with investigation of the influence of electric current and magnetic field on the amplitude of the terahertz photoconductivity in Pb1 − x Sn x Te(In) alloys of different composition. It is shown that the density of local electron states responsible for the positive persistent photoconductivity decreases with increasing electric current via a sample, as well as with transition to the hole conductivity in samples with a high content of tin telluride (x > 0.26). It is found that the magnetic field dependence of the positive photoconductivity is non-monotonous and has a maximum. The maximum position in magnetic field is proportional to the terahertz radiation quantum energy. Mechanisms responsible for the effects observed are discussed.

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Copyright information

© Pleiades Publishing, Ltd. 2013

Authors and Affiliations

  • L. I. Ryabova
    • 1
  • A. V. Nicorici
    • 2
  • S. N. Danilov
    • 3
  • D. R. Khokhlov
    • 1
  1. 1.Moscow State UniversityMoscowRussia
  2. 2.Institute of Applied PhysicsAcademy of Sciences of MoldovaKishinevMoldova
  3. 3.University of RegensburgRegensburgGermany

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