Correlation between band structure and magneto-transport properties in a far-infrared detector superlattice

A. El Abidi; A. Nafidi; H. Chaib; A. El kaaouachi; A. Toumanari; M. Braigue; I. Zorkani; J. Hemine; M. Zazoui

doi:10.1117/12.803320

26 August 2008 Correlation between band structure and magneto-transport properties in a far-infrared detector superlattice

A. El Abidi, A. Nafidi, H. Chaib, A. El kaaouachi, A. Toumanari, M. Braigue, I. Zorkani, J. Hemine, M. Zazoui

Author Affiliations +

Proceedings Volume 7055, Infrared Systems and Photoelectronic Technology III; 70550C (2008) https://doi.org/10.1117/12.803320
Event: Photonic Devices + Applications, 2008, San Diego, California, United States

Abstract

We report here carrier's magneto-transport properties and the band structure results for II-IV semiconductors. HgTe is a zero gap semiconductor when it is sandwiched between CdTe layers to yield to a small gap HgTe/CdTe superlattice which is the key of an infrared detector. Our sample, grown by MBE, had a period d (100 layers) of 18 nm (HgTe) / 4.4 nm (CdTe). Calculations of the spectra of energy E(k_z) and E(k_p), respectively, in the direction of growth and in the plane of the superlattice were performed in the envelope function formalism. The angular dependence of the transverse magnetoresistance follows the two-dimensional (2D) behavior with Shubnikov-de Haas oscillations. At low temperature, the sample exhibits p type conductivity with a hole mobility of 900 cm²/V.s. A reversal the sign of the weak-field Hall coefficient occurs at 25 K with an electron mobility of 3.10⁴ cm²/Vs. In intrinsic regim, the measured E_g ≈ 38 meV agrees with calculated E_g(Γ,300 K) = 34 meV which coincide with the Fermi level energy. The formalism used here predicts that this narrow gap sample is semi metallic, quasi-two-dimensional and far-infrared detector.

Citation Download Citation

A. El Abidi, A. Nafidi, H. Chaib, A. El kaaouachi, A. Toumanari, M. Braigue, I. Zorkani, J. Hemine, and M. Zazoui "Correlation between band structure and magneto-transport properties in a far-infrared detector superlattice", Proc. SPIE 7055, Infrared Systems and Photoelectronic Technology III, 70550C (26 August 2008); https://doi.org/10.1117/12.803320

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available