Article
Chemistry, Physical
A. K. Tan, N. A. Hamzah, M. A. Ahmad, S. S. Ng, Z. Hassan
Summary: In this study, InGaN/GaN heterostructures were grown on a flat sapphire substrate using MOCVD technique. Results showed that a higher V/III ratio led to parasitic behavior by hydrogen dissociated from ammonia, which etched the InN and changed the growth morphology. Moreover, the InGaN thin films grown at higher V/III ratios exhibited more stable bandgap energy and improved electrical properties. The correlation between strain and carrier density was also discussed, and it was concluded that high-quality and thick InGaN thin films could be grown for solar cell applications at higher V/III ratio conditions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Multidisciplinary
Wei Zhang, Shuang Han, Xin-Jun Ma, Xianglian, Yong Sun, Jing-Lin Xiao
Summary: This study investigates the ground state energy of weak coupling polarons confined in III-V compound semiconductor quantum dots. The results demonstrate that the ground state energy splits into two branches due to the Rashba spin-orbit coupling effect. The spin splitting spacing is influenced by the strength of the Rashba spin-orbit coupling and the coupling strength and effective mass of the III-V compound semiconductor material.
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Jia-Xin Xiong, Shan Guan, Jun-Wei Luo, Shu-Shen Li
Summary: Contrary to conventional wisdom, a strong and tunable k-linear Rashba SOC has been discovered in Ge/Si semiconductor quantum wells, originating from a combination of heavy-hole-light-hole mixing and direct dipolar coupling to the external electric field. Ge/Si QWs oriented in the [110] direction exhibit a much stronger linear Rashba SOC compared to their [001] counterparts, making them an excellent platform for large-scale quantum computation.
Article
Chemistry, Analytical
Pierre Fehlen, Guillaume Thomas, Fernando Gonzalez-Posada, Julien Guise, Francesco Rusconi, Laurent Cerutti, Thierry Taliercio, Denis Spitzer
Summary: Chemical warfare agents, such as sarin, are highly lethal to humans and require sensitive and selective detection. Infrared absorption spectroscopy is a powerful technique, but the mismatch between infrared light wavelength and molecule absorption cross-section dimensions reduces sensitivity. To address this, a plasmonic sensor using III-V semiconductors InAsSb with nano-antennas and enhanced electric field was proposed. Experiments using a sarin simulant showed that the sensor successfully detected the molecule at low concentrations. This work demonstrates the application of III-V semiconductor plasmonics for gas sensing of complex molecules using surface-enhanced infrared absorption.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Multidisciplinary
Xin Zhang, Wei Zhang, Xin-Jun Ma, Pei-Fang Li, Yong Sun, Jing-Lin Xiao
Summary: This study numerically investigates the effects of a decay magnetic field and hydrogen-like impurities on the ground-state binding energy and ground-state energy of weak-coupling bound polarons in asymmetrical Gaussian potential III-V compound quantum wells. It reveals a series of interesting phenomena and provides theoretical guidance for optoelectronic devices and quantum information.
Article
Chemistry, Multidisciplinary
Oussama Moutanabbir, Simone Assali, Anis Attiaoui, Gerard Daligou, Patrick Daoust, Patrick Del Vecchio, Sebastian Koelling, Lu Luo, Nicolas Rotaru
Summary: This work demonstrates the epitaxial growth of Ge-70/silicon-germanium (SiGe) quantum wells with depleted Ge-73 and Si-29 isotopes, achieving nuclear spin-free Ge qubits. The study shows that the isotopic purity of the quantum wells is highly sensitive to the growth conditions.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Fabrizio Guzzetta, Cameron W. Jellett, Jalal Azadmanjiri, Pradip Kumar Roy, Saeed Ashtiani, Karel Friess, Zdenek Sofer
Summary: The attention in recent decades has been focused on the optoelectronic properties of indium and gallium chalcogenides, leading to advancements in fundamental and applied science. Group III-VI compounds have laminated structures that can be exfoliated to monolayers. Besides indium and gallium chalcogenides, there are other uncommon compounds in the family of group III-VI compounds, which have various crystal lattices, including layered structures. Aluminum chalcogenides show potential as anodes in batteries and semiconductors. Studies on thallium-based compounds are still exploring their semiconducting and thermoelectric properties. This review aims to summarize the significant features of these unusual materials and propose new studies to revive their potential in future technology.
Article
Engineering, Electrical & Electronic
Yu Han, Ying Xue, Zhao Yan, Kei May Lau
Summary: Epitaxially integrating III-V lasers with Si-photonics using selective area hetero-epitaxy on industry-standard silicon-on-insulator (SOI) platforms has been investigated. By selectively growing InP on (001)-oriented SOI wafers, InP stripes and segments were demonstrated, enabling efficient light interfacing with Si-based photonic devices. The potential of utilizing this selective area growth method to realize fully integrated Si-photonics is illustrated.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Chemistry, Physical
Changming Ke, Yihao Hu, Shi Liu
Summary: Using first-principles calculations, we demonstrate the softening of unswitchable wurtzite III-V semiconductors at the nanoscale, resulting in ultrathin two-dimensional sheets with reversible polarization states. We identify a three-atomic-layer AlSb sheet that exhibits both ferroelectricity and antiferroelectricity, with tristate switching accompanied by a metal-semiconductor transition. Phonon spectrum calculations, ab initio molecular dynamics simulations, and variable-composition evolutionary structure search confirm the thermodynamic stability and potential synthesis of this triatomic layer. We propose a 2D AlSb-based homojunction field effect transistor that supports three distinct and nonvolatile resistance states, enabling nonvolatile multibit-based integrated nanoelectronics.
NANOSCALE HORIZONS
(2023)
Article
Materials Science, Multidisciplinary
Maui Hino, Meita Asami, Kentaroh Watanabe, Yoshiaki Nakano, Masakazu Sugiyama
Summary: This study investigates the influence of the V/III ratio on the radiative efficiency (eta rad) of indium gallium phosphide (InGaP) multiple quantum well (MQW) structures. The eta rad increases with increasing V/III ratio. However, the eta rad degrades at excessively high V/III ratios. It is found that inserting an InGaP MQW grown under an appropriate V/III ratio improves the InGaP solar cell performance.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
San-Dong Guo, Xu-Kun Feng, Dong Huang, Shaobo Chen, Guangzhao Wang, Yee Sin Ang
Summary: This study reveals that T-XY monolayers possess persistent spin helix structure, which can be applied in spintronic devices and provide a promising platform for on-off logical functionality.
Article
Materials Science, Multidisciplinary
San-Dong Guo, Xu-Kun Feng, Dong Huang, Shaobo Chen, Guangzhao Wang, Yee Sin Ang
Summary: Persistent spin texture (PST) and persistent spin helix (PSH) are of great importance for improving the performance of spintronic devices. In this study, T-XY monolayers are predicted to possess PST and can be used to achieve on-off logical functionality using an external electric field.
Article
Physics, Applied
Philip C. Klipstein
Summary: In a photodiode made from a narrow bandgap III-V material such as InSb, the dominant dark current mechanism is thermal generation-recombination in the depletion region. XBn or XBp barrier detectors suppress the generation-recombination current by using a wide bandgap barrier material. Diffusion limited barrier detectors have a unity gain device architecture that is fundamentally different from traditional photodiodes. High performance barrier detector arrays for mid- and long-wave infrared detection have been developed using bulk alloy and type II superlattice (T2SL) absorbers.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Sebastiano Caccamo, Rosaria Anna Puglisi
Summary: This study presents a molecular doping method using phosphoric acid as a dopant precursor, which allows for higher predetermined surface density and electrical carrier doses compared to traditional methods using organic molecules as precursors.
Article
Nanoscience & Nanotechnology
M. A. Toloza Sandoval, G. C. La Rocca, E. A. de Andrada e Silva
Summary: The electronic structure of lead-salt topological quantum wells is investigated using an effective model. The study reveals new features in the spectrum, including large band splittings in asymmetric quantum wells for the topological Dirac states within the energy gap.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Chemistry, Multidisciplinary
Mi-Jin Jin, Seon Young Moon, Jungmin Park, Vijayakumar Modepalli, Junhyeon Jo, Shin-Ik Kim, Hyun Cheol Koo, Byoung-Chul Min, Hyun-Woo Lee, Seung-Hyub Baek, Jung-Woo Yoo
Article
Chemistry, Physical
Juwon Lee, Yoon Shon, N. G. Subramaniam, Taewon Kang, Jae Min Sohn, Hyungsang Kim, Hyunsik Im, Hyun Cheol Koo, Joo-Hyeon Lee, Jing Dong Song, Chang-Soo Park, Eun Kyu Kim
JOURNAL OF ALLOYS AND COMPOUNDS
(2017)
Article
Nanoscience & Nanotechnology
Jae Min Sohn, Hyungsang Kim, Hyunsik Im, Hyungbae Kim, Juwon Lee, Yoon Shon, N. G. Subramaniam, Taewon Kang, Deuk Young Kim, Hyun Cheol Koo, Joo-hyeon Lee, Jing Dong Song, Chang-Soo Park, Eun Kyu Kim
Article
Multidisciplinary Sciences
Tae-Eon Park, Youn Ho Park, Jong-Min Lee, Sung Wook Kim, Hee Gyum Park, Byoung-Chul Min, Hyung-Jun Kim, Hyun Cheol Koo, Heon-Jin Choi, Suk Hee Han, Mark Johnson, Joonyeon Chang
NATURE COMMUNICATIONS
(2017)
Article
Multidisciplinary Sciences
Seonghoon Woo, Kyung Mee Song, Hee-Sung Han, Min-Seung Jung, Mi-Young Im, Ki-Suk Lee, Kun Soo Song, Peter Fischer, Jung-Il Hong, Jun Woo Choi, Byoung-Chul Min, Hyun Cheol Koo, Joonyeon Chang
NATURE COMMUNICATIONS
(2017)
Article
Chemistry, Analytical
Sung Jong Kim, Seung-Woo Lee, Jin Dong Song, Young-Wan Kwon, Kyung-Jin Lee, Hyun Cheol Koo
SENSORS AND ACTUATORS B-CHEMICAL
(2018)
Article
Multidisciplinary Sciences
Seonghoon Woo, Kyung Mee Song, Xichao Zhang, Yan Zhou, Motohiko Ezawa, Xiaoxi Liu, S. Finizio, J. Raabe, Nyun Jong Lee, Sang-Il Kim, Seung-Young Park, Younghak Kim, Jae-Young Kim, Dongjoon Lee, OukJae Lee, Jun Woo Choi, Byoung-Chul Min, Hyun Cheol Koo, Joonyeon Chang
NATURE COMMUNICATIONS
(2018)
Article
Multidisciplinary Sciences
Youn Ho Park, Jun Woo Choi, Hyung-jun Kim, Joonyeon Chang, Suk Hee Han, Heon-Jin Choi, Hyun Cheol Koo
SCIENTIFIC REPORTS
(2017)
Article
Chemistry, Multidisciplinary
Sang-Jun Choi, Kyung Ho Kim, Hyun Jin Kim, Jun Soo Yoon, Mi Jung Lee, Kyung-Suk Choi, Ung-Dae Sung, Won-Taek Park, Jeongjun Lee, Jihyun Jeon, Jaehyuk Im, Kyoung-Kook Kim, Soohaeng Cho
APPLIED SCIENCES-BASEL
(2019)
Article
Nanoscience & Nanotechnology
Kyung Ho Kim, Byeong-Seok Oh, Sahn Nahm, Hae-Won Cheong, Yoon Soo Han
Summary: Thermal batteries are widely used in military applications due to their high structural stability and reliability. This study presents a new equipment to detect damage or leakage of molten electrolyte in a thermal battery during high-speed rotation, and finite element analysis is conducted to predict the influencing factors and stress distribution.
INTERNATIONAL JOURNAL OF NANOTECHNOLOGY
(2022)
Article
Thermodynamics
Kyung Ho Kim, Kyoon Choi, Yoon Soo Han, Sahn Nahm, Sung-Min Lee
Summary: The study conducted a cyclic fatigue test and monotonic tensile test on SiCf/SiC ceramic matrix composites at 1400 degrees Celsius, showing typical fiber pull-out in the monotonic test and brittle fracture in the cyclic fatigue test with different oxidation levels and crack propagation observed in the microstructure analysis.
HIGH TEMPERATURES-HIGH PRESSURES
(2021)
Article
Materials Science, Multidisciplinary
Youn Ho Park, Hyun-jun Kim, Joonyeon Chang, Hyun Cheol Koo
CURRENT APPLIED PHYSICS
(2017)
Article
Physics, Applied
Tae-Eon Park, Byoung-Chul Min, Hee Gyum Park, Jaejun Lee, Moon-Ho Jo, Chaun Jang, Hyun Cheol Koo, Heon-Jin Choi, Joonyeon Chang
APPLIED PHYSICS LETTERS
(2017)
Article
Materials Science, Multidisciplinary
SangHoon Shin, YounHo Park, HyunCheol Koo, YunHeub Song, JinDong Song
CURRENT APPLIED PHYSICS
(2017)
Article
Materials Science, Multidisciplinary
Won Young Choi, Hyung-Jun Kim, Joonyeon Chang, Gyungchoon Go, Kyung-Jin Lee, Hyun Cheol Koo
CURRENT APPLIED PHYSICS
(2017)