1k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- The Graduate University for Advanced Studies, SOKENDAIJP143 papers
- National Institutes of Natural SciencesJP76 papers
- The University of TokyoJP75 papers
- The University of OsakaJP59 papers
- Kyoto UniversityJP52 papers
- Tohoku UniversityJP46 papers
- Japan Science and Technology AgencyJP32 papers
- Nagoya UniversityJP30 papers
- Hiroshima UniversityJP27 papers
- High Energy Accelerator Research OrganizationJP26 papers
- RIKENJP26 papers
- Tokyo Institute of TechnologyJP26 papers
25 papers · 1 filter
Spatial Control of Charge Doping in n-Type Topological Insulators
Kazuyuki Sakamoto, Hirotaka Ishikawa, Takashi Wake +17
Spatially controlling the Fermi level of topological insulators and keeping its electronic states stable are indispensable processes to put this material into practical use for sem…
Chirality-dependent spin polarization in metals: linear and quadratic responses
Kosuke Yoshimi, Yusuke Kato, Yuta Suzuki +6
We study spin polarization induced by locally injected electric currents in a metal whose spin--orbit coupling reflects its structural chirality. We reveal both spin polarization i…
Inelastic Light Scattering in the Vicinity of a Single-Atom Quantum Point Contact in a Plasmonic Picocavity
Shuyi Liu, Franco P. Bonafe, Heiko Appel +3
Here, using low-temperature optical scanning tunneling microscopy (STM), we investigate inelastic light scattering (ILS) in the vicinity of a single-atom quantum point contact (QPC…
Antiferromagnetic topological insulator with selectively gapped Dirac cones
A. Honma, D. Takane, S. Souma +14
Antiferromagnetic (AF) topological materials offer a fertile ground to explore a variety of quantum phenomena such as axion magnetoelectric dynamics and chiral Majorana fermions. T…
Control and enhancement of single-molecule electroluminescence through strong light-matter coupling
Kuniyuki Miwa, Souichi Sakamoto, Akihito Ishizaki
The energetic positions of molecular electronic states at molecule/electrode interfaces are crucial factors for determining the transport and optoelectronic properties of molecular…
Chirality-induced intrinsic charge rectification in a tellurium-based field-effect transistor
Daichi Hirobe, Yoji Nabei, Hiroshi M. Yamamoto
We report gate-induced enhancement of intrinsic charge rectification without p-n junctions in chiral semiconductor Te under magnetic field B. As gating shifts the chemical potentia…
Femtosecond Thermal and Nonthermal Hot Electron Tunneling inside a Photoexcited Tunnel Junction
Natalia Martín Sabanés, Faruk Krecinic, Takashi Kumagai +3
Efficient operation of electronic nanodevices at ultrafast speeds requires understanding and control of the currents generated by femtosecond bursts of light. Ultrafast laser-induc…
Spin accumulation in the spin Nernst effect
Atsuo Shitade
The spin Nernst effect is a phenomenon in which the spin current flows perpendicular to a temperature gradient. Similar to the spin Hall effect, this phenomenon also causes spin ac…
Spin accumulation without spin current
Atsuo Shitade, Gen Tatara
The spin Hall (SH) effect is a phenomenon in which the spin current flows perpendicular to an applied electric field and causes the spin accumulation at the boundaries. However, in…
Van Hove Singularity and Lifshitz Transition in Thickness-Controlled Li-Intercalated Graphene
S. Ichinokura, M. Toyoda, M. Hashizume +8
We demonstrate a new method to control the Fermi level around the van Hove singularity (VHS) in Li-intercalated graphene on the SiC substrate. By angle-resolved photoemission spect…
Magnetization energy current in the axial magnetic effect
Atsuo Shitade, Yasufumi Araki
The axial magnetic effect (AME) is one of the anomalous transport phenomena in which the energy current is induced by an axial magnetic field. Here, we numerically study the AME fo…
Thermodynamic approach to electric quadrupole moments
Akito Daido, Atsuo Shitade, Youichi Yanase
Higher-rank electric/magnetic multipole moments are attracting attention these days as candidate order parameters for exotic material phases. However, quantum-mechanical formulatio…
Chiral vortical effect in relativistic and nonrelativistic systems
Atsuo Shitade, Kazuya Mameda, Tomoya Hayata
We formulate the chiral vortical effect (CVE) and its generalization called generalized vortical effect using the semiclassical theory of wave packet dynamics. We take the spin-vor…
Geometric spin-orbit coupling and chirality-induced spin selectivity
Atsuo Shitade, Emi Minamitani
We report a new type of spin-orbit coupling (SOC) called geometric SOC. Starting from the relativistic theory in curved space, we derive an effective nonrelativistic Hamiltonian in…
Fermi level tuning of one-dimensional giant Rashba system on a semiconductor substrate: Bi/GaSb(110)-(2x1)
Takuto Nakamura, Yoshiyuki Ohtsubo, Naoki Tokumasu +10
We fabricated spin-polarized surface electronic states with tunable Fermi level from semiconductor to low-dimensional metal in the Bi/GaSb(110)-(21) surface using angle-res…
Ultrafast Quantum-path Interferometry Revealing the Generation Process of Coherent Phonons
Kazutaka G. Nakamura, Kensuke Yokota, Yuki Okuda +5
Optical dual-pulse pumping actively creates quantum-mechanical superposition of the electronic and phononic states in a bulk solid. We here made transient reflectivity measurements…
Precise determination of excitation energies in condensed-phase molecular systems based on exciton-polariton measurements
Nguyen Thanh Phuc, Akihito Ishizaki
The precise determination of the excitation energies in condensed-phase molecular systems is important for understanding system-environment interactions as well as for the prerequi…
Control of Quantum Dynamics of Electron Transfer in Molecular Loop Structures: Spontaneous Breaking of Chiral Symmetry under Strong Decoherence
Nguyen Thanh Phuc, Akihito Ishizaki
Manipulation of quantum systems is the basis for many promising quantum technologies. However, how quantum mechanical principles can be used to manipulate the dynamics of quantum d…
Observation of rotational Brownian motion of single diamond nanoparticles
Masazumi Fujiwara, Yutaka Shikano, Ryuta Tsukahara +2
Capturing the rotational motion of single nanoparticles has been hindered owing to the difficulty of acquiring directional information under the optical diffraction limit. Here, we…
Non-Markovian quantum-classical ratchet for ultrafast long-range electron-hole separation in condensed phases
Akihito Kato, Akihito Ishizaki
In organic photovoltaic systems, a photogenerated molecular exciton in the donor domain dissociates into a hole and an electron at the donor/acceptor heterojunction, and subsequent…
Aperiodic quantum oscillations of particle-hole asymmetric Dirac cones
E. Tisserond, J. N. Fuchs, M. O. Goerbig +9
We report experimental measurements and theoretical analysis of Shubnikov-de Haas (SdH) oscillations in a Dirac cone system: the a-(BEDT-TTF)2I3 organic metal under hydrostatic pre…
Spectrally resolved detection in transient-reflectivity measurements of coherent optical phonons in diamond
Kazutaka G. Nakamura, Kazuma Ohya, Hiroshi Takahashi +7
Coherent optical phonons in bulk solid system play a crucial role in understanding and designing light-matter interactions and can be detected by the transient-reflectivity measure…
Influence of pulse width and detuning on coherent phonon generation
Kazutaka G. Nakamura, Yutaka Shikano, Yosuke Kayanuma
We investigated the coherent phonon generation mechanism by irradiation of an ultrashort pulse with a simple two-level model. Our derived formulation shows that both impulsive stim…
Self-Assembled Nanowires with Giant Rashba-Type Band Splitting
Jewook Park, Sung Won Jung, Min-Cherl Jung +3
We investigated Pt-induced nanowires on the Si(110) surface using scanning tunneling microscopy (STM) and angle-resolved photoemission (ARP). High resolution STM images show a well…