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Updated: Dec 27, 2025

Fabrication of Schottky Diodes on Zn-polar BeMgZnO/ZnO Heterostructure Grown by Plasma-assisted Molecular Beam Epitaxy
Published on: October 23, 2018
Effective Schottky barrier lowering of NiGe/p-Ge(100) using Terbium interlayer structure for high performance p-type
Sunil Babu Eadi1, Jeong Chan Lee1, Hyeong-Sub Song1
1Department of Electronics Engineering, Chungnam National University, Daejeon, Korea.
Abstract:
Ultra-low contact resistance at the interface between NiGe and p-Ge, i.e., NiGe/p-Ge was achieved by introducing terbium (Tb) as an interlayer in forming NiGe using Tb/Ni/TiN structure. The contact resistance value obtained using the circular transmission line model for an 8-nm thick Tb interlayer sample was 7.21 × 10-8 Ω·cm2, which is two orders of magnitude less than that of reference sample (without the Tb interlayer) of 7.36 × 10-6 Ω·cm2. The current-voltage characteristics were studied at a temperature range of -110 ~ 25 °C to determine the effective Schottky barrier height (eSBH). An eSBH of 0.016 eV was obtained for the 8-nm thick Tb interlayer. Various Tb interlayer thicknesses were selected to study their effect on the contact resistance. The Tb interlayer surface and structural properties were characterized using FESEM, XRD, XPS, TEM, and SIMS analyses.
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