Center for Integrated Nanostructure Physics

In current solid-state physics, 2D materials such as graphene and transition metal dichalcogenides have been a main ingredient in diverse fields including materials science, physics, chemistry and even energy. Though there are still many “unsolved scientific issues” and “need to be confirmed issues” in the research fields of 2D materials, our center has attempted to find an opportunity for a new science beyond ever-explored 2D materials. Thus, we have conceived that an exploratory project needs to be initiated from the discovery of new materials, which have exotic quantum phenomena. Furthermore, it should be highly pursued that the new quantum materials enable next-generation applications such as a quantum computation.

▲ Figure 1. Research scope in exploratory project titled “Emerging Quantum Materials”

Major publications

1. Dense dislocation arrays embedded in grain boundaries for high-performance bulk thermoelectrics, S.I. Kim, K.H. Lee, H.A. Mun, H.S. Kim, S.W. Hwang, J.W. Roh, D.J. Yang, W.H. Shin, X. S. Li, Y. H. Lee, G.J. Snyder, Sung Wng Kim*, Science, 348, 6230, 109-114 (2015)

2. Phase Patterning for Ohmic Homojunction Contact in MoTe2, S.Y.Cho, S. Kim, J. Kim, J. Zhao, J. Seok, D. Keum, J. Baik, D. Choe, K. Chang, K. Suenaga, Sung Wng Kim*, Young Hee Lee*, Heejun Yang*, Science, 349, 6248, 625-628 (2015)

3. Structural and quantum-state phase transition in van der Waals layered materials, Heejun Yang*, Sung Wng Kim*, Manish Chhowalla, Young Hee Lee*, Nature Physics, doi:10.1038/nphys4188 (2017)

4. Bandgap opening in few-layered monoclinic MoTe2, D.H. Keum, S.Y. Cho, J.H. Kim, D.H. Choe, H.J. Sung, M. Kan, H.Y. Kang, J.Y. Hwang, Sung Wng Kim*, Heejun Yang*, K. J. Chang*, Young Hee Lee*, Nature Physics, 11, 482-486 (2015)

5. Creation of two-dimensional layered Zintl phase by dimensional manipulation of crystal structure, J. Song et al. , Science Advance. eaax0390, (2019)

6. Ferromagnetic quasi-atomic electrons in two-dimensional electride., S. Y. Lee et al., Nature Communications. 11, 1526 (2020).

7. Water- and acid-stable self-passivated dihafnium sulfide electride and its persistent electrocatalytic reaction. Kang, S. H. et al., Science Advance. In press.