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- [1] High uniformity and stability of 1S1R directly stacked for high-density cross-point memory applicationsRARE METALS, 2022, 41 (11) : 3671 - 3676Yu, Zhi-Ying论文数: 0 引用数: 0 h-index: 0机构: Hubei Yangtze Memory Labs, Wuhan 430205, Peoples R China Hubei Univ, Sch Microelect, Wuhan 430062, Peoples R China Hubei Yangtze Memory Labs, Wuhan 430205, Peoples R ChinaZhao, Jia-Yi论文数: 0 引用数: 0 h-index: 0机构: Hubei Univ, Sch Microelect, Wuhan 430062, Peoples R China Hubei Yangtze Memory Labs, Wuhan 430205, Peoples R ChinaMa, Guo-Kun论文数: 0 引用数: 0 h-index: 0机构: Hubei Yangtze Memory Labs, Wuhan 430205, Peoples R China Hubei Univ, Sch Microelect, Wuhan 430062, Peoples R China Hubei Yangtze Memory Labs, Wuhan 430205, Peoples R ChinaChen, Ao论文数: 0 引用数: 0 h-index: 0机构: Hubei Yangtze Memory Labs, Wuhan 430205, Peoples R China Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Peoples R China Hubei Yangtze Memory Labs, Wuhan 430205, Peoples R ChinaChen, Da-Lei论文数: 0 引用数: 0 h-index: 0机构: Hubei Univ, Sch Microelect, Wuhan 430062, Peoples R China Hubei Yangtze Memory Labs, Wuhan 430205, Peoples R ChinaRao, Yi-Heng论文数: 0 引用数: 0 h-index: 0机构: Hubei Yangtze Memory Labs, Wuhan 430205, Peoples R China Hubei Univ, Sch Microelect, Wuhan 430062, Peoples R China Hubei Yangtze Memory Labs, Wuhan 430205, Peoples R ChinaWang, Hao论文数: 0 引用数: 0 h-index: 0机构: Hubei Yangtze Memory Labs, Wuhan 430205, Peoples R China Hubei Univ, Sch Microelect, Wuhan 430062, Peoples R China Hubei Yangtze Memory Labs, Wuhan 430205, Peoples R China
- [2] High uniformity and stability of 1S1R directly stacked for high-density cross-point memory applicationsRare Metals, 2022, 41 (11) : 3671 - 3676Zhi-Ying Yu论文数: 0 引用数: 0 h-index: 0机构: Hubei Yangtze Memory Laboratories School of Microelectronic,Hubei University Hubei Yangtze Memory LaboratoriesJia-Yi Zhao论文数: 0 引用数: 0 h-index: 0机构: School of Microelectronic,Hubei University Hubei Yangtze Memory LaboratoriesGuo-Kun Ma论文数: 0 引用数: 0 h-index: 0机构: Hubei Yangtze Memory Laboratories School of Microelectronic,Hubei University Hubei Yangtze Memory LaboratoriesAo Chen论文数: 0 引用数: 0 h-index: 0机构: Hubei Yangtze Memory Laboratories School of Physics and Technology,Wuhan University Hubei Yangtze Memory LaboratoriesDa-Lei Chen论文数: 0 引用数: 0 h-index: 0机构: School of Microelectronic,Hubei University Hubei Yangtze Memory LaboratoriesYi-Heng Rao论文数: 0 引用数: 0 h-index: 0机构: Hubei Yangtze Memory Laboratories School of Microelectronic,Hubei University Hubei Yangtze Memory LaboratoriesHao Wang论文数: 0 引用数: 0 h-index: 0机构: Hubei Yangtze Memory Laboratories School of Microelectronic,Hubei University Hubei Yangtze Memory Laboratories
- [3] 1S1R device with self-compliance property for high density cross-point memory applications2015 15TH NON-VOLATILE MEMORY TECHNOLOGY SYMPOSIUM (NVMTS), 2015,Li, Xinyi论文数: 0 引用数: 0 h-index: 0机构: Tsinghua Univ, Inst Microelect, Beijing 100084, Peoples R China Tsinghua Univ, Inst Microelect, Beijing 100084, Peoples R ChinaWu, Huaqiang论文数: 0 引用数: 0 h-index: 0机构: Tsinghua Univ, Inst Microelect, Beijing 100084, Peoples R China Tsinghua Univ, Inst Microelect, Beijing 100084, Peoples R ChinaDeng, Ning论文数: 0 引用数: 0 h-index: 0机构: Tsinghua Univ, Inst Microelect, Beijing 100084, Peoples R China Tsinghua Univ, Inst Microelect, Beijing 100084, Peoples R ChinaQian, He论文数: 0 引用数: 0 h-index: 0机构: Tsinghua Univ, Inst Microelect, Beijing 100084, Peoples R China Tsinghua Univ, Inst Microelect, Beijing 100084, Peoples R China
- [4] Advanced process technologies of 1S1R for High Density Cross Point ReRAM2015 SILICON NANOELECTRONICS WORKSHOP (SNW), 2015,Kim, Beom Yong论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, New Memory Proc Team, R&D Div, Ichon, South Korea SK Hynix Inc, New Memory Proc Team, R&D Div, Ichon, South KoreaKim, Hyeong Soo论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, New Memory Proc Team, R&D Div, Ichon, South Korea SK Hynix Inc, New Memory Proc Team, R&D Div, Ichon, South Korea
- [5] One Selector-One Resistor (1S1R) Crossbar Array for High-density Flexible Memory Applications2011 IEEE INTERNATIONAL ELECTRON DEVICES MEETING (IEDM), 2011,Huang, Jiun-Jia论文数: 0 引用数: 0 h-index: 0机构: Natl Chiao Tung Univ, Dept Elect Engn, Hsinchu, Taiwan Natl Chiao Tung Univ, Dept Elect Engn, Hsinchu, TaiwanTseng, Yi-Ming论文数: 0 引用数: 0 h-index: 0机构: Natl Chiao Tung Univ, Inst Elect, Hsinchu, Taiwan Natl Chiao Tung Univ, Dept Elect Engn, Hsinchu, TaiwanLuo, Wun-Cheng论文数: 0 引用数: 0 h-index: 0机构: Natl Chiao Tung Univ, Inst Elect, Hsinchu, Taiwan Natl Chiao Tung Univ, Dept Elect Engn, Hsinchu, TaiwanHsu, Chung-Wei论文数: 0 引用数: 0 h-index: 0机构: Natl Chiao Tung Univ, Inst Elect, Hsinchu, Taiwan Natl Chiao Tung Univ, Dept Elect Engn, Hsinchu, TaiwanHou, Tuo-Hung论文数: 0 引用数: 0 h-index: 0机构: Natl Chiao Tung Univ, Inst Elect, Hsinchu, Taiwan Natl Chiao Tung Univ, Dept Elect Engn, Hsinchu, Taiwan
- [6] 1D Selection Device Using Carbon Nanotube FETs for High-Density Cross-Point Memory ArraysIEEE TRANSACTIONS ON ELECTRON DEVICES, 2015, 62 (07) : 2197 - 2204Ahn, Chiyui论文数: 0 引用数: 0 h-index: 0机构: Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USAJiang, Zizhen论文数: 0 引用数: 0 h-index: 0机构: Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA论文数: 引用数: h-index:机构:Chen, Hong-Yu论文数: 0 引用数: 0 h-index: 0机构: Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USALiang, Jiale论文数: 0 引用数: 0 h-index: 0机构: Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USALiyanage, Luckshitha S.论文数: 0 引用数: 0 h-index: 0机构: Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USAWong, H. -S. Philip论文数: 0 引用数: 0 h-index: 0机构: Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA
- [7] Diode-less Nano-scale ZrOx/HfOx RRAM Device with Excellent Switching Uniformity and Reliability for High-density Cross-point Memory Applications2010 INTERNATIONAL ELECTRON DEVICES MEETING - TECHNICAL DIGEST, 2010,Lee, Joonmyoung论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaShin, Jungho论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaLee, Daeseok论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaLee, Wootae论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaJung, Seungjae论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaJo, Minseok论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaPark, Jubong论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaBiju, Kuyyadi P.论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Dept Nanobio Mat & Elect, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaKim, Seonghyun论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaPark, Sangsu论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Dept Nanobio Mat & Elect, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaHwang, Hyunsang论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Dept Nanobio Mat & Elect, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea
- [8] Threshold Switching Selector and 1S1R Integration Development for 3D Cross-point STT-MRAM2017 IEEE INTERNATIONAL ELECTRON DEVICES MEETING (IEDM), 2017,Yang, Hongxin论文数: 0 引用数: 0 h-index: 0机构: Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USA Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USAHao, Xiaojie论文数: 0 引用数: 0 h-index: 0机构: Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USA Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USAWang, Zihui论文数: 0 引用数: 0 h-index: 0机构: Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USA Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USAMalmhall, Roger论文数: 0 引用数: 0 h-index: 0机构: Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USA Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USAGan, Huadong论文数: 0 引用数: 0 h-index: 0机构: Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USA Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USASatoh, Kimihiro论文数: 0 引用数: 0 h-index: 0机构: Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USA Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USAZhang, Jing论文数: 0 引用数: 0 h-index: 0机构: Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USA Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USAJung, Dong Ha论文数: 0 引用数: 0 h-index: 0机构: Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USA Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USAWang, Xiaobin论文数: 0 引用数: 0 h-index: 0机构: Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USA Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USAZhou, Yuchen论文数: 0 引用数: 0 h-index: 0机构: Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USA Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USAYen, Bing K.论文数: 0 引用数: 0 h-index: 0机构: Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USA Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USAHuai, Yiming论文数: 0 引用数: 0 h-index: 0机构: Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USA Avalanche Technol, 46600 Landing Pkwy, Fremont, CA 94538 USA
- [9] NbO2-based Low Power and Cost Effective 1S1R Switching for High Density Cross Point ReRAM Application2014 SYMPOSIUM ON VLSI TECHNOLOGY (VLSI-TECHNOLOGY): DIGEST OF TECHNICAL PAPERS, 2014,Kim, Wan Gee论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South Korea SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaLee, Hyun Min论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South Korea SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaKim, Beom Yong论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South Korea SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaJung, Kyoo Ho论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South Korea SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaSeong, Tae Geun论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South Korea SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaKim, Seonghyun论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South Korea SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaJung, Ha Chang论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South Korea SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaKim, Hyo June论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South Korea SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaYoo, Jong Hee论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South Korea SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaLee, Hyung Dong论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South Korea SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaKim, Soo Gil论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South Korea SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaChung, Suock论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South Korea SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaLee, Kee Jeung论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South Korea SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaLee, Jung Hoon论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South Korea SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaKim, Hyeong Soo论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South Korea SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaLee, Seok Hee论文数: 0 引用数: 0 h-index: 0机构: SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South Korea SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaYang, Jianhua论文数: 0 引用数: 0 h-index: 0机构: Hewlett Packard Labs, Palo Alto, CA 94306 USA SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaJeon, Yoocharn论文数: 0 引用数: 0 h-index: 0机构: Hewlett Packard Labs, Palo Alto, CA 94306 USA SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South KoreaWilliams, R. Stanley论文数: 0 引用数: 0 h-index: 0机构: Hewlett Packard Labs, Palo Alto, CA 94306 USA SK Hynix Inc, R&D Div, 2091 Gyeongchung Daero Bubal Eub, Icheon Si 467701, Gyeonggi Do, South Korea
- [10] MIM-type cell selector for high-density and low-power cross-point memory applicationMICROELECTRONIC ENGINEERING, 2012, 93 : 81 - 84Shin, Jungho论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaChoi, Godeuni论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaWoo, Jiyong论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaPark, Jubong论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaPark, Sangsu论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaLee, Wootae论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaKim, Seonghyun论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaSon, Myungwoo论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South KoreaHwang, Hyunsang论文数: 0 引用数: 0 h-index: 0机构: Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea