๋ถํ์ด์ฒญ๊ฐ์ฐ
๋๋
ธ์์ฌ
๊น๋ํ ๊ต์ ์์ธ๋ํ๊ต
โ Education
2013 | Ph.D Physics University of Maryland |
2009 | Material Science Yonsei University |
2006 | Material Science Yonsei University |
โ Professional Career
2016.3 - Present | Assistant and Associate Professer Physics and Astronomy Seoul National University, Korea. |
2015.3 - 2016.2 | Assistant Professor Material Science and Engineering Yonsei University, Korea. |
2013.6 – 2015.2 | Postdoctoral researcher Physics department University of Wisconsin, USA |
Semiconductor spin qubit-based quantum information experiments
Quantum computers operating according to the laws of quantum mechanics have undergone conceptual development based on theoretical science for the past 30 years, and nowadays intensive efforts are made on small-scale operation demonstrations and large-scale integration. In this talk, I will introduce the field of developing quantum information hardware based on solid state device with emphasis on Gate-defined quantum dot spin qubits. In particular, the current stage of quantum engineering is often referred to as Noisy Intermediate Scale Quantum (NISQ), that is, the era of medium-scale quantum computing of 50-100 qubits operating without quantum error correction. We will look at the utility of such quantum computers and look at the efforts to develop large-scale quantum computers with error correcting capability.
์ฒ๋์ ๋ฐ์ฌ KIST(์์ธ๊ณผํ๊ธฐ์ ์ฐ๊ตฌ์)
โ Education
1998 - 2005 | B. S. Metallurgical Engineering Yonsei University, Seoul, Korea |
2005 - 2007 | M. S. Metallurgical Engineering Yonsei University, Seoul, Korea |
2013 - 2016 | Ph. D. Materials Science & Engineering University of California San Diego, San Diego, California, U.S.A |
โ Professional Career
2007 - 2012 | Research Scientist Korea Institute of Science and Technology (KIST), Seoul, Korea |
2013 - 2016 | Research Assistant and Teaching Assistant University of California San Diego, San Diego, California, U.S.A |
2016 - Present | Senior Researcher Advanced Analysis Center Korea Institute of Science and Technology (KIST), Seoul, Korea |
Hexagonal Close-packed Palladium Hydride in Liquid Cell TEM
Metastable phases—kinetically favored structures—are ubiquitous in nature. Rather than forming thermodynamically stable ground-state structures, crystals grown from high-energy precursors often adopt metastable structures, and they undergo a series of transformations to energetically stable lower-energy phases, as described by Wilhelm Ostwald. The most common strategy for synthesizing a metastable material is by means of manipulating thermodynamic conditions that mostly depend on heuristic, on the basis of experiences, intuitions, or even speculative predictions. The new design rule is embodied in the discovery of a metastable hexagonal close-packed (HCP) palladium hydride (Pd-H), synthesized in a liquid cell environment using a transmission electron microscope (TEM).
In this talk, I will introduce metastable HCP Pd-H and its distinctive properties compared with its FCC counterpart. Furthermore, growth mechanism of HCP Pd-H will be discussed that could provide a new thermodynamic insight into metastability-engineering strategy to be deployed in discovering new metastable phases.
๊ฐ์ฃผํ ๊ต์ ์ฑ๊ท ๊ด๋ํ๊ต
โ Education
2018 - 2019 | Postdoctoral Scholar Chemistry University of California at Berkeley, Berkeley, CA, USA |
2012 - 2018 | Ph.D. Materials Science and Engineering Northwestern University, Evanston, IL, USA |
2009 - 2011 | M.S. Materials Science and Engineering Yonsei University, Seoul, South Korea |
โ Professional Career
2019 - Present | Assistant Professor School of Advanced Materials Science and Engineering Sungkyunkwan University (SKKU), Suwon, South Korea |
2018 - 2019 | Research Affiliate Organic and Macromolecular Synthesis Molecular Foundry Lawrence Berkeley National Laboratory, Berkeley, CA, USA |
Chemically-Welded Nanomaterials for Scalable Optoelectronics
Metastable phases—kinetically favored structures—are ubiquitous in nature. Rather than forming thermodynamically stable ground-state structures, crystals grown from high-energy precursors often adopt metastable structures, and they undergo a series of transformations to energetically stable lower-energy phases, as described by Wilhelm Ostwald. The most common strategy for synthesizing a metastable material is by means of manipulating thermodynamic conditions that mostly depend on heuristic, on the basis of experiences, intuitions, or even speculative predictions. The new design rule is embodied in the discovery of a metastable hexagonal close-packed (HCP) palladium hydride (Pd-H), synthesized in a liquid cell environment using a transmission electron microscope (TEM).
In this talk, I will introduce metastable HCP Pd-H and its distinctive properties compared with its FCC counterpart. Furthermore, growth mechanism of HCP Pd-H will be discussed that could provide a new thermodynamic insight into metastability-engineering strategy to be deployed in discovering new metastable phases.