Effect of screening on the phonon–polaron states in a nanotube of diluted magnetic semiconductor

• Published in: Физика низких температур
• Date: 2013
• Main Author: Seyid-Rzayeva, S.M.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2013
• Subjects: Свеpхпpоводимость, в том числе высокотемпеpатуpная
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/118467
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Effect of screening on the phonon–polaron states in a nanotube of diluted magnetic semiconductor / S.M. Seyid-Rzayeva // Физика низких температур. — 2013. — Т. 39, № 6. — С. 642–648. — Бібліогр.: 29 назв. — англ.

We report the calculation results of the effect of screening on weakly coupling Fröhlich polaron binding energy of the ground state and polaron contribution to the mass for the lowest spin-down subband of the conduc-tion band in a diluted magnetic semiconductor nanotube. The expressions for the energy of the polaron and the polaron contribution to the effective mass was obtained as a function of the magnetic field and the radius of the nanotube, taking into account the screening effect as well as virtual transitions from the ground state with n = 0 to the size-quantized subbands with n' = 1, 2, …, 10. The performed numerical calculations demonstrate that the effect of screening decreases the polaronic binding energy and polaronic contribution to the effective mass about 35 and 25, respectively, for the value of the magnetic field equal 0.1 T. It has been established that the effect of screening reduces polaron binding energy of the ground state approximately by 30–15 and also re-duces the polaron contribution to the effective mass by 25–10 with increase of the nanotube radius in the range about 10–40 nm.