Determining the Concentration of Free Electrons in n-InSb from Far-Infrared Reflectance Spectra with Allowance for Plasmon–Phonon Coupling

Journal Article · Sat Dec 15 00:00:00 EST 2018 · Semiconductors (Woodbury, N.Y., Print)

DOI:https://doi.org/10.1134/S1063782618150034· OSTI ID:22945132

Belova, I. M. ^[1]; Belov, A. G.; Kanevsky, V. E. ^[2]

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1. Moscow Technological University (Russian Federation)
2. AO Giredmet (Russian Federation)

Contactless nondestructive testing is a means for determining the concentration of free electrons N in indium antimonide (InSb) samples from far-infrared reflectance spectra recorded at room temperature. A computer program capable of determining the characteristic wave number from the Kramers–Kronig relation is developed. The calculated calibration dependence makes it possible to determine the electron concentration from the known characteristic wave number. It is shown that this dependence is described by a cubic polynomial. In the calculations, the energy dependence of the electron effective mass is taken into account. It is established that, in determining the electron concentration, account must be taken of plasmon–phonon coupling, specifically at N ≤ 5 × 10{sup 17} cm{sup –3}. The systematic error introduced into the determination of N by disregard of plasmon–phonon coupling is estimated. The software elaborated here makes it possible to calculate the electron concentration N from experimental reflectance spectra and to store and process the results. The software is tested by the example of the reflectance spectrum of heavily doped n-InSb.

• OSTI ID: 22945132
• Journal Information: Semiconductors (Woodbury, N.Y., Print), Vol. 52, Issue 15; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7826
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALIBRATION
COMPUTER CODES
DOPED MATERIALS
EFFECTIVE MASS
ELECTRON DENSITY
ELECTRONS
ENERGY DEPENDENCE
ERRORS
INDIUM ANTIMONIDES
KRAMERS-KRONIG CORRELATION
NONDESTRUCTIVE TESTING
PHONONS
PLASMONS
POLYNOMIALS
TEMPERATURE RANGE 0273-0400 K