M. Kawasaki

Electric field control of SrVO3 double quantum well

N. Takahara, Kei Takahashi, Yoshinori Tokura, M. Kawasaki

Field-effect transistors are widely used to control carrier density in a channel of a semiconductor by a gate voltage. Mott transistors employing strongly correlated electron systems as a channel are particularly intriguing due to their switching mechanism being cooperative phase transitions. In …

jp (code pays fourni par la source)

Nanoscale Penetration Depth of Emergent Magnetic Field at an Oxide Spin-Ice/Metal Interface

Yota K. Nakajima, Takahiro Fujita, M. Kawasaki

The geometrically frustrated spin-ice pyrochlore Dy2Ti2O7 (DTO) provides a platform for exploring topological physics arising from emergent magnetic fields (bem). While proximity-coupled interfaces have enabled the detection of bem in insulating magnets via the topological Hall effect (THE), harnessing these phenomena for …

jp (code pays fourni par la source)

Reentrant superconductivity at an oxide heterointerface

D. Maryenko, Minoru Kawamura, Igor V. Maznichenko, S. Ostanin et autres

A magnetic field typically suppresses superconductivity by either breaking Cooper pairs via the Zeeman effect or inducing vortex formation. However, under certain circumstances, a magnetic field can stabilize superconductivity instead. This seemingly counterintuitive phenomenon is associated with magnetic interactions and has been …

jp, de, cn, pl, es, at (code pays fourni par la source)

Record-high Glass coefficient in the shift current response of a ferroelectric halide perovskite

Koma Miki, Masao Nakamura, Asahi Yamada, Gurvan Bosser et autres

Ferroelectric halide perovskites provide a fertile platform for optoelectronic functions based on the bulk photovoltaic effect, where broken inversion symmetry couples with quantum geometry of wave functions. The most prominent manifestation is the shift current, second-order nonlinear photocurrent arising from change in …

jp (code pays fourni par la source)

Charge sensing of few-electron ZnO double quantum dots probed by radio-frequency reflectometry

Kosuke Noro, Motoya Shinozaki, Yusuke Kozuka, Koichi Baba et autres

jp (code pays fourni par la source)

Coherent Microwave Control of Optically Addressable Donor Qubits in ZnO

Ethan R. Hansen, Di Wu, Yixuan Li, Yaser Silani et autres

Optically addressable shallow donors in ZnO combine efficient spin-selective optical transitions with the potential for long spin coherence in an isotopically purifiable host lattice, making them an attractive platform for spin-photon quantum technologies. A key missing capability, however, has been coherent control …

Coherent Microwave Control of Optically Addressable Donor Qubits in ZnO

Ethan R. Hansen, Dong-Rong Wu, Yixuan Li, Yaser Silani et autres

Optically addressable shallow donors in ZnO combine efficient spin-selective optical transitions with the potential for long spin coherence in an isotopically purifiable host lattice, making them an attractive platform for spin-photon quantum technologies. A key missing capability, however, has been coherent control …

us, jp (code pays fourni par la source)

Large terahertz photovoltaic effect enhanced by phonon excitations in ferroelectric semiconductor SbSI

Yoshihiro Okamura, Guang-Yu Guo, Y. Kaneko, Masao Nakamura et autres

Quantum geometry of Bloch electron in crystalline solids produces various exotic quantum phenomena. The shift current photovoltaic effect driven by the photo creation of quasiparticle is one such emerging example that enables the conversion from terahertz photon into dc charge current with …

jp, tw (code pays fourni par la source)

Quantum geometry in low-energy linear and nonlinear optical responses of the magnetic Rashba semiconductor (Ge,Mn)Te

Tsubasa Takagi, Hikaru Watanabe, Ryutaro Yoshimi, Yuki Sato et autres

Quantum geometry appears as a key factor in understanding the optical properties of quantum materials, with the anticipation on diverging or quantized responses near the Dirac and Weyl points. Here we investigate linear and nonlinear optical responses -- optical conductivity and injection …

jp (code pays fourni par la source)

Structural origin of resonant diffraction in RuO 2

Connor A. Occhialini, Christie Nelson, A. Bombardi, Shiyu Fan et autres

us, gb, jp (code pays fourni par la source)

Superconductivity and suppressed monoclinic distortion in FeTe films enabled by higher-order epitaxy

Yuki Sato, S. Nagahama, Shunsuke Kitou, Hajime Sagayama et autres

Molecular beam epitaxy enables the growth of thin film materials with novel properties and functionalities. Typically, the lattice constants of films and substrates are designed to match to minimise disorders and strains. However, significant lattice mismatches can result in higher-order epitaxy, where …

jp (code pays fourni par la source)

Two-Dimensional Superconducting Diode Effect in Topological Insulator/Superconductor Heterostructure

S. Nagahama, Yuki Sato, Minoru Kawamura, Ilya Belopolski et autres

The superconducting diode effect (SDE) is characterized by the nonreciprocity of Cooper-pair motion with respect to current direction. In three-dimensional (3D) materials, SDE results in a critical current that varies with direction, making the effect distinctly observable: the material exhibits superconductivity in …

jp (code pays fourni par la source)