RIKEN Center for Emergent Matter Science Strong Correlation Interface Research Group

Group Director: Masashi Kawasaki (D.Eng.)

Japanese Page

Research Summary

Being distinct from conventional semiconductors where single electron picture can explain their properties and device functionalities, correlated quantum materials exhibit exotic properties governed by electron-electron interaction. When dissimilar electronic states are faced at atomically controlled interfaces, their keen competition is expected to give gigantic responses to external stimuli. Also emerging field is to explore novel quantum transport in two-dimensional systems created at the interfaces of such materials. We aim at designing and controlling the interfacial properties to realize surpassing device performances in switches, sensors and photovoltaics to those of semiconductors.

Main Research Fields

Interdisciplinary Science & Engineering

Related Research Fields

Mathematical & Physical Sciences

Keywords

Oxide Electronics
Topological Electronics
Interface Engineering
Quantum Transport
Interfaces and Superlattcies

Selected Publications

1.Y. Ohuchi, J. Matsuno, N. Ogawa, Y. Kozuka, M. Uchida, Y. Tokura, and M. Kawasaki.:
“Electric-field control of anomalous and topological Hall effects in oxide bilayer thin films”
Nat. Commun., 9, 213 (2018)
2.D. Maryenko, A. McCollam, J. Falson, Y. Kozuka, J. Bruin, U. Zeitler, and M. Kawasaki.:
“Composite fermion liquid to Wigner solid transition in the lowest Landau level of zinc oxide”
Nat. Commun., 9, 4356 (2018)
3.S. Nishihaya, M. Uchida, Y. Nakazawa, M. Kriener, Y. Kozuka, Y. Taguchi, and M. Kawasaki.:
“Gate-tuned quantum Hall states in Dirac semimetal (Cd_1-x Znx)₃As₂”
Sci. Adv., 4, eaar5668 (2018)
4.K. S. Takahashi, H. Ishizuka, T. Murata, Q. Wang, Y. Tokura, N. Nagaosa, and M. Kawasaki.:
“Anomalous Hall effect derived from multiple Weyl nodes in high-mobility EuTiO₃ films”
Sci. Adv., 4, eaar7880 (2018)
5.J. Falson, D. Tabrea, D. Zhang, I. Sodemann, Y. Kozuka, A. Tsukazaki, M. Kawasaki, K. von Klitzing, and J. H. Smet.:
“A cascade of phase transitions in an orbitally mixed half-filled Landau level”
Sci. Adv., 4, eaat8742 (2018)
6.M. Nakamura, H. Hatada, Y. Kaneko, N. Ogawa, Y. Tokura, and M. Kawasaki.:
“Impact of electrodes on the extraction of shift current from a ferroelectric semiconductor SbSI”
Appl. Phys. Lett., 113, 232901-1-5 (2018)
7.K. Yasuda, M. Mogi, R. Yoshimi, A. Tsukazaki, K. S. Takahashi, M. Kawasaki, F. Kagawa, and Y. Tokura.:
“Quantized chiral edge conduction on domain walls of a magnetic topological insulator”
Science, 358, 1311-1314 (2017)
8.Y. Tokura, M. Kawasaki, and N. Nagaosa.:
“Emergent functions of quantum materials”
Nat. Phys., 13, 1056-1068 (2017)
9.D. Maryenko, A.S. Mishchenko, M.S. Bahramy, A. Ernst, J. Falson, Y. Kozuka, A. Tsukazaki, N. Nagaosa, and M. Kawasaki.:
“Observation of anomalous Hall effect in a non-magnetic two-dimensional electron system”
Nat. Commun., 8, 14777 (2017)
10.M. Nakamura, S. Horiuchi, F. Kagawa, N. Ogawa, T. Kurumaji, Y. Tokura, and M. Kawasaki.:
“Shift current photovoltaic effect in a ferroelectric charge-transfer complex”
Nat. Commun., 8, 281 (2017)