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Kentaro Ueda
Kentaro Ueda
Employment
2018.09- Research Associate in the University of Tokyo
2016.04-2018.08 Postdoc in Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
Education
2013.04-2016.03 Ph.D. in Department of Applied Physics, the University of Tokyo
2011.04-2013.03 M.S. in Department of Applied Physics, the University of Tokyo
2007.04-2011.03 B.S. in Department of Applied Physics, the University of Tokyo
Research Areas
Research Areas
crystal growth, quantum transport, topological material, strongly correlated electron system, frustration
Selected papers
Selected papers
K. Ueda, T. Oh, B.-J. Yang, R. Kaneko, J. Fujioka, N. Nagaosa, and Y. Tokura
“Magnetic-field induced multiple topological phases in pyrochlore iridates with Mott criticality”
Nature Communications 8, 15515 (2017)
K. Ueda, J. Fujioka, and Y. Tokura
“Variation of optical conductivity spectra in the course of bandwidth-controlled metal-insulator transitions in pyrochlore iridates”
Physical Review B 93, 245120 (2016)
（*equally contributed）
E. Y. Ma*, Y.-T. Cui*, K. Ueda*, S. Tang, K. Chen, N. Tamura, P. M. Wu, J. Fujioka, Y. Tokura, and Z.-X. Shen
“Mobile metallic domain walls in an all-in-all-out magnetic insulator”
K. Ueda, J. Fujioka, B.-J. Yang, J. Shiogai, A. Tsukazaki, S. Nakamura, S. Awaji, N. Nagaosa, and Y. Tokura
“Magnetic Field-Induced Insulator-Semimetal Transition in a Pyrochlore Nd2Ir2O7”
Physical Review Letters 115, 056402 (2015)
K. Ueda, S. Iguchi, T. Suzuki, S. Ishiwata, Y. Taguchi, and Y. Tokura
“Topological Hall Effect in Pyrochlore Lattice with Varying Density of Spin Chirality”
Techniques
Techniques
Crystal growth
Crystal growth
High pressure synthesis
"Fully filling-controlled pyrochlore ruthenates: Emergent ferromagnetic-metal state and geometrical Hall effect"
Physical Review B 103, L201111 (2021)
“Evolution of possible Weyl semimetal states across the Mott transition in pyrochlore iridates induced by hole doping”
Flux method
“Spontaneous Hall effect in the Weyl semimetal candidate of all-in all-out pyrochlore iridate”
Nature Communications 9, 3032 (2018)
“Magnetic Field-Induced Insulator-Semimetal Transition in a Pyrochlore Nd2Ir2O7”
Physical Review Letters 115, 056402 (2015)
Floating zone
Transport measurement
Transport measurement
Electric transport under pressure and magnetic field
“Pressure and magnetic field effects on metal-insulator transitions of bulk and domain wall states in pyrochlore iridates”
Physical Review B 92, 121110 (2015)
“Anomalous domain-wall conductance in pyrochlore-type Nd2Ir2O7 on the verge of the metal-insulator transition”
Thermoelectric measurement
“Enhanced thermopower in the correlated semimetallic phase of hole-doped pyrochlore iridates”
Optical measurement
Optical measurement
Optical reflectivity and conductivity
“Variation of Charge Dynamics in the Course of Metal-Insulator Transition for Pyrochlore-Type Nd2Ir2O7”
Physical Review Letters 109, 136402 (2012)
“Variation of optical conductivity spectra in the course of bandwidth-controlled metal-insulator transitions in pyrochlore iridates”
Raman spectroscopy
“Phonon anomalies in pyrochlore iridates studied by Raman spectroscopy”
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