We report here manifestation of resonant state and transition semiconductor-semimetal inducted by temperature in magneto-transport properties and bands structure in HgTe (d1=40 nm)/CdTe(d2=15 nm) superlattice (SL) grown by MBE. Calculations of the spectres of energy E(d2), E(kz) and E(kp), respectively, in the direction of growth and in plane of the superlattice; were performed in the envelope function formalism. The energy E(d2, Γ, 77 K), shown that when d2 increase the gap Eg decrease to zero at the transition semiconductor to semimetal conductivity behaviour (at d2=11,5 nm) and become negative accusing a semimetallic conduction. At 4.2 K, the sample exhibits n type conductivity with a Hall mobility of 1500 cm2/Vs. The weak-field Hall coefficient present a small maximum at about 30 K attributed to the presence of an acceptor resonant state. In intrinsic regime, RH T3/2 indicates a gap Eg = 5,3 meV in agreement with calculated Eg(Γ, 300 K)= E1-HH1 =6 meV. The later gap Eg(T) goes to zero at T=148 K with a transition semimetal to semiconductor conductivity. The formalism used here predicts that this sample is a narrow gap semimetallic, two-dimensional and far-infrared detector.

© 2013 Optical Society of America

PDF Article
More Like This
Bands Structure and Magneto-Transport Properties in n Type Narrow Gap Semimetallic, Two-Dimensional and Far-Infrared Detector HgTe/CdTe Superlattice

Aomar Idbaha, Abdelhakim Nafidi, Bernabé Marí Soucase, and M. Mollar García
AF3B.1 Asia Communications and Photonics Conference (ACPC) 2013

MBE growth and properties of newel II-VI superlattice systems: Hg1−xCdxTe, HgTe-ZnTe, and CdTe-ZnTe

MCC1 International Quantum Electronics Conference (IQEC) 1986

Molecular beam epitaxy of HgCdTe and HgTe-CdTe superlattices for infrared uses

MI2 Conference on Lasers and Electro-Optics (CLEO) 1988


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access Optica Member Subscription