[1
]Department of Electrical and Computer Engineering Sungkyunkwan University Suwon 16419
Korea
[2
]Department of Semiconductor and Display Engineering Sungkyunkwan University Suwon
440‐746 Korea
[3
]Memory Technology Design Team Samsung Electronics Co. Ltd Hwasung 18448 Korea
[4
]SKKU Advanced Institute of Nanotechnology (SAINT) Sungkyunkwan University Suwon 16419
Korea