Dawn of nitride ferroelectric semiconductors: from materials to devices

P Wang, D Wang, S Mondal, M Hu… - Semiconductor Science …, 2023 - iopscience.iop.org
III-nitride semiconductors are promising optoelectronic and electronic materials and have
been extensively investigated in the past decades. New functionalities, such as …

New-generation ferroelectric AlScN materials

Y Zhang, Q Zhu, B Tian, C Duan - Nano-Micro Letters, 2024 - Springer
Ferroelectrics have great potential in the field of nonvolatile memory due to programmable
polarization states by external electric field in nonvolatile manner. However, complementary …

AlScN/GaN HEMTs grown by metal-organic chemical vapor deposition with 8.4 W/mm output power and 48% power-added efficiency at 30 GHz

S Krause, I Streicher, P Waltereit… - IEEE Electron …, 2022 - ieeexplore.ieee.org
We report on DC and RF measurement results of AlScN/GaN high electron mobility
transistors (HEMTs) grown by metal-organic chemical vapor deposition (MOCVD) …

Scandium-doped aluminum nitride for acoustic wave resonators, filters, and ferroelectric memory applications

L Chen, C Liu, M Li, W Song, W Wang… - ACS Applied …, 2022 - ACS Publications
Scandium-doped aluminum nitride (AlScN) has generated great research interest owing to
its unique properties. The wurtzite-structure AlScN is compatible with the complementary …

N-polar ScAlN and HEMTs grown by molecular beam epitaxy

P Wang, D Wang, B Wang, S Mohanty, S Diez… - Applied Physics …, 2021 - pubs.aip.org
Molecular beam epitaxy of single-phase wurtzite N-polar Sc x Al 1− x N (x∼ 0.11–0.38) has
been demonstrated on sapphire substrates by locking its lattice-polarity to the underlying N …

Band alignment and charge carrier transport properties of YAlN/III-nitride heterostructures

D Wang, S Mondal, P Kezer, M Hu, J Liu, Y Wu… - Applied Surface …, 2023 - Elsevier
Incorporating rare earth element scandium (Sc) into III-nitride wurtzite lattice offers
remarkable non-oxide ferroelectrics, tunable spontaneous polarization coefficients, and …

[HTML][HTML] Epitaxial ScxAl1− xN on GaN exhibits attractive high-K dielectric properties

J Casamento, H Lee, T Maeda, V Gund… - Applied Physics …, 2022 - pubs.aip.org
Epitaxial Sc x Al 1− x N thin films of∼ 100 nm thickness grown on metal polar GaN
substrates are found to exhibit significantly enhanced relative dielectric permittivity (ε r) …

Transport properties of polarization-induced 2D electron gases in epitaxial AlScN/GaN heterojunctions

J Casamento, TS Nguyen, Y Cho, C Savant… - Applied Physics …, 2022 - pubs.aip.org
AlScN is attractive as a lattice-matched epitaxial barrier layer for incorporation in GaN high
electron mobility transistors due to its large dielectric constant and polarization. The …

Metal‐Organic Chemical Vapor Deposition of Aluminum Yttrium Nitride

S Leone, I Streicher, M Prescher… - physica status solidi …, 2023 - Wiley Online Library
Transition metal nitrides, namely group 3 (Sc and Y) elements alloyed with AlN, are
predicted to enhance several characteristics of wurtzite semiconducting nitrides, thanks to …

Enhanced AlScN/GaN heterostructures grown with a novel precursor by metal–organic chemical vapor deposition

I Streicher, S Leone, L Kirste, C Manz… - physica status solidi …, 2023 - Wiley Online Library
Growth of AlScN high‐electron‐mobility transistor (HEMT) structures by metal–organic
chemical vapor deposition (MOCVD) is challenging due to the low vapor pressure of the …