53 citations · 103 across the 14 of their papers we have counts for
14 papers
On-chip detection of anisotropic thermopolarization in quartz
Shuichi Iwakiri, Yasumitsu Miyata, Takao Mori
Temperature gradients are widely used to drive and probe transport phenomena in solids, forming the basis of heat-to-charge conversion processes. In typical experiments, local heat…
Observation of universal thermopolarization effect in insulators
Shuichi Iwakiri, Yasumitsu Miyata, Takao Mori
Heat-to-charge conversion has traditionally been realized via the Seebeck effect in conductors and pyroelectricity in polar insulators. Here, we demonstrate that temperature gradie…
Gate-defined superconducting channel in magic-angle twisted bilayer graphene
Giulia Zheng, Elías Portolés, Alexandra Mestre-Torá +8
Magic-angle twisted bilayer graphene (MATBG) combines in one single material different phases like insulating, metallic and superconducting. These phases and their in-situ tunabili…
High mobility transport in isotopically-enriched C and C exfoliated graphene
Shuichi Iwakiri, Jakob Miller, Florian Lang +8
Graphene quantum dots are promising candidates for qubits due to weak spin-orbit and hyperfine interactions. The hyperfine interaction, controllable via isotopic purification, coul…
Tunable quantum interferometer for correlated moiré electrons
Shuichi Iwakiri, Alexandra Mestre-Torà, Elías Portolés +8
Magic-angle twisted bilayer graphene (MATBG) can host an intriguing variety of gate-tunable correlated states, including superconducting and correlated insulator states. Junction-b…
Nonlinear response of 2DEG in the quantum Hall regime
Shuichi Iwakiri, Lev V. Ginzburg, Marc P. Röösli +7
Breaking of inversion symmetry leads to nonlinear and nonreciprocal electron transport, in which the voltage response does not invert with the reversal of the current direction. Ma…
Gate-defined electron interferometer in bilayer graphene
Shuichi Iwakiri, Folkert K. de Vries, Elías Portolés +5
We present an electron interferometer defined purely by electrostatic gating in encapsulated bilayer graphene. This minimizes possible sample degradation introduced by conventional…
A Tunable Monolithic SQUID in Twisted Bilayer Graphene
Elías Portolés, Shuichi Iwakiri, Giulia Zheng +6
Magic-angle twisted bilayer graphene (MATBG) hosts a number of correlated states of matter that can be tuned by electrostatic doping. Superconductivity has drawn considerable atten…
Negative correlation between the linear and the nonlinear conductance in magnetic tunnel junctions
Shuichi Iwakiri, Satoshi Sugimoto, Yasuhiro Niimi +4
The current-voltage () characteristics beyond the linear response regime of magnetic tunnel junction (MTJ) is systematically investigated. We find a clear negative correlation…
Etching process of narrow wire and application to tunable-barrier electron pump
Shota Norimoto, Shuichi Iwakiri, Masahiko Yokoi +3
Single electron sources have been studied as a device to establish an electric current standard for 30 years and recently as an on-demand coherent source for Fermion quantum optics…
Generation of Multipeak Spectrum of Spin Torque Oscillator in Non-linear Regime
Shuichi Iwakiri, Satoshi Sugimoto, Yasuhiro Niimi +4
We investigate the spectral characteristics of spin torque oscillator (STO) excited by the spin Hall-induced spin current. We observe that the modest spin current injection trigger…
Interplay of Friction and Structural Asymmetry in Non-Reciprocal Dynamics of a Rolling Prism
Shuichi Iwakiri
We investigate how the dynamics of a hexagonal prism rolling on a floor change with friction and structural asymmetry. It is shown that the asymmetry induces the non-reciprocal dyn…
Multiple modes of a single spin torque oscillator under the non-linear region
Satoshi Sugimoto, Shuichi Iwakiri, Yusuke Kozuka +4
A numerical investigation is conducted for a single spin-torque oscillator under the non-linear region. A large angle precession triggers the generation of multiple modes without a…
Dynamics of Pure Spin Current in High-frequency Quantum Regime
Shuichi Iwakiri, Yasuhiro Niimi, Kensuke Kobayashi
Pure spin current is a powerful tool for manipulating spintronic devices, and its dynamical behavior is an important issue. By using mesoscopic transport theory for electron tunnel…