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 Superlattices

Selected Publications

1. M. Nakamura, Y.H. Chan, T. Yasunami, Y.S. Huang, G.Y. Guo, Y. Hu, N. Ogawa, Y.L. Chiew, X.Z. Yu, T. Morimoto, N. Nagaosa, Y. Tokura, and M. Kawasaki.:
"Strongly enhanced shift current at exciton resonances in a noncentrosymmetric widegap semiconductor"
Nat. Commun. 15, 9672 (2024).
2. M. Ohno, T. C. Fujita, and M. Kawasaki.:
"Proximity effect of emergent field from spin ice in an oxide heterostructure"
Sci. Adv. 10, eadk6308 (2024).
3. L. Zhang, T. C. Fujita, Y. Masutake, M. Kawamura, T. Arima, H. Kumigashira, M. Tokunaga, and M. Kawasaki.:
"Peculiar magnetotransport properties in epitaxially stabilized orthorhombic Ru³⁺ perovskite LaRuO₃ and NdRuO₃"
Commun. Mater. 5, 35 (2024).
4. T. C. Fujita, K. Omura, M. Kawasaki.:
"Topological Hall eﬀect in a non-magnetic metal interfaced to a canted antiferromagnetic insulator in perovskite oxide heterostructures"
Appl. Phys. Lett. 125, 011602 (2024).
5. K. S. Takahashi, J. Iguchi, Y. Tokura, and M. Kawasaki.:
"Metal-insulator transitions in strained single quantum wells of Sr_1-xLa_xVO₃"
Phys. Rev. B 109, 035158 (2024).
6. D. Maryenko, I. V. Maznichenko, S. Ostanin, M. Kawamura, K. S. Takahashi, M. Nakamura, V. K. Dugaev, E. Ya. Sherman, A. Ernst, and M. Kawasaki.:
"Superconductivity at epitaxial LaTiO₃-KTaO₃ interfaces"
APL Mater. 11, 061102 (2023).
7. M. Nakamura, R. Namba, T. Yasunami, N. Ogawa, Y. Tokura, and M. Kawasaki.:
"Crossover from strong to weak exciton confinement in thickness-controlled epitaxial PbI₂ thin films"
Appl. Phys. Lett. 122, 073101 (2023).
8. N. Takahara, K. S. Takahashi, Y. Tokura, and M. Kawasaki.:
"Evolution of ferromagnetism and electron correlation in Eu_1-xGd_xTiO₃ thin films with 4f⁷ configuration"
Phys. Rev B 108, 125138 (2023).
9. M. Nakamura, S. Inagaki, Y. Okamura, M. Ogino, Y. Takahashi, K. Adachi, D. Hashizume, Y. Tokura, and M. Kawasaki.:
"Band structures in orientation-controlled CuI thin films under epitaxial strain"
Phys. Rev B., 106, 125307 (2022).
10. M. Ohno, S. Minami, Y. Nakazawa, S. Sato, M. Kriener, R. Arita, M. Kawasaki, and M. Uchida.:
"Maximizing intrinsic anomalous Hall effect by controlling the Fermi level in simple Weyl semimetal films"
Phys. Rev B., 105, 125307 (2022).