877 citations · 1.5k across the 21 of their papers we have counts for
21 papers
Excitation and relaxation dynamics of spin-waves triggered by ultrafast photo-induced demagnetization in a ferrimagnetic insulator
Yusuke Hashimoto, Koji Sato, Tom H. Johansen +1
Excitation and propagation dynamics of spin waves in an iron-based garnet film under out-of-plane magnetic field were investigated by time-resolved magneto-optical imaging. The exp…
Magnetization Dynamics in Holographic Ferromagnets: Landau-Lifshitz Equation from Yang-Mills Fields
Naoto Yokoi, Koji Sato, Eiji Saitoh
We introduce a new approach to understand magnetization dynamics in ferromagnets based on the holographic realization of ferromagnets. A Landau-Lifshitz equation describing the mag…
The Krein-Schrödinger Formalism of Bosonic BdG and Certain Classical Systems and Their Topological Classification
Max Lein, Koji Sato
To understand recent works on classical and quantum spin equations and their topological classification, we develop a unified mathematical framework for bosonic BdG systems and ass…
Topologically nontrivial magnonic solitons
Mehrdad Elyasi, Koji Sato, Gerrit E. W. Bauer
The intrinsic non-linearities of the spin dynamics in condensed matter systems give rise to a rich phenomenology that can be strongly affected by topology. Here we study formation…
Antiferromagnetic Interorbital Spin-Exchange Interaction of Yb
Koki Ono, Jun Kobayashi, Yoshiki Amano +2
We report on the investigation of the scattering properties between the ground state and the metastable state of the fermionic isotope of Yb. We successfull…
Solitons in one-dimensional mechanical linkage
Koji Sato, Ryokichi Tanaka
It has been observed that certain classical chains admit topologically protected zero-energy modes that are localized on the boundaries. The static features of such localized modes…
Fu-Kane-Mele monopoles in semimetals
Guo Chuan Thiang, Koji Sato, Kiyonori Gomi
In semimetals with time-reversal symmetry, the interplay between Weyl points and Fu-Kane-Mele indices results in coexisting surface Dirac cones and Fermi arcs that are transmutable…
Tunable sign change of spin Hall magnetoresistance in Pt/NiO/YIG structures
Dazhi Hou, Zhiyong Qiu, Joseph Barker +7
Spin Hall magnetoresistance (SMR) has been investigated in Pt/NiO/YIG structures in a wide range of temperature and NiO thickness. The SMR shows a negative sign below a temperature…
Skyrmion Hall Effect Revealed by Direct Time-Resolved X-Ray Microscopy
Kai Litzius, Ivan Lemesh, Benjamin Krüger +14
Magnetic skyrmions are highly promising candidates for future spintronic applications such as skyrmion racetrack memories and logic devices. They exhibit exotic and complex dynamic…
Anomalous Hall effect driven by dipolar spin waves in uniform ferromagnets
Kei Yamamoto, Koji Sato, Eiji Saitoh +1
A new type of anomalous Hall effect is shown to arise from the interaction of conduction electrons with dipolar spin waves in ferromagnets. This effect exists even in homogeneous f…
A Holographic Realization of Ferromagnets
Naoto Yokoi, Masafumi Ishihara, Koji Sato +1
A holographic realization for ferromagnetic systems has been constructed. Owing to the holographic dictionary proposed on the basis of this realization, we obtained relevant thermo…
Electrically controlled pinning of Dzyaloshinskii-Moriya domain walls
Koji Sato, Oleg A. Tretiakov
We propose a method to all-electrically control a domain-wall position in a ferromagnetic nanowire with Dzyaloshinskii-Moriya interaction. The strength of this interaction can be c…
Constraints on models of the Higgs boson with exotic spin and parity using the full CDF data set
T. Aaltonen, CDF Collaboration
A search for particles with the same mass and couplings as those of the standard model Higgs boson but different spin and parity quantum numbers is presented. We test two specific…
Updated Measurement of the Single Top Quark Production Cross Section and in the Missing Transverse Energy Plus Jets Topology in Collisions at TeV
CDF Collaboration, T. Aaltonen, S. Amerio +399
An updated measurement of the single top quark production cross section is presented using the full data set collected by the Collider Detector at Fermilab (CDF) and corresponding…
Detection of entanglement by helical Luttinger liquids
Koji Sato, Yaroslav Tserkovnyak
A Cooper-pair or electron-hole splitter is a device capable of spatially separating entangled fermionic quasiparticles into mesoscopic solid-state systems such as quantum dots or q…
Evidence for -channel Single-Top-Quark Production in Events with one Charged Lepton and two Jets at CDF
CDF Collaboration, T. Aaltonen, S. Amerio +405
We report evidence for -channel single-top-quark production in proton-antiproton collisions at center-of-mass energy using a data set that correspo…
Electron-Hole Entanglement in a Quantum Spin Hall Insulator
Koji Sato, Mircea Trif, Yaroslav Tserkovnyak
We demonstrate that entangled electron-hole pairs can be produced and detected in a quantum spin Hall insulator with a constriction that allows for a weak inter-edge tunneling. A v…
Landau-Lifshitz theory of the longitudinal spin Seebeck effect
Silas Hoffman, Koji Sato, Yaroslav Tserkovnyak
Thermal-bias-induced spin angular momentum transfer between a paramagnetic metal and ferromagnetic insulator is studied theoretically based on the stochastic Landau-Lifshitz-Gilber…
Crossed Andreev Re ection in Quantum Wires with Strong Spin-Orbit Interaction
Koji Sato, Daniel Loss, Yaroslav Tserkovnyak
We theoretically study tunneling of Cooper pairs from an s-wave superconductor into two semiconductor quantum wires with strong spin-orbit interaction under magnetic field, which a…
Cooper-Pair Injection into Quantum Spin Hall Insulators
Koji Sato, Daniel Loss, Yaroslav Tserkovnyak
We theoretically study tunneling of Cooper pairs from a superconductor spanning a two-dimensional topological insulator strip into its helical edge states. The coherent low-energy…
Sheet Dependence on Superconducting Gap in Oxygen-Deficient Iron-based Oxypnictide Superconductors NdFeAs0.85
Yoshihiro Aiura, Koji Sato, Hideaki Iwasawa +12
Photoemission spectroscopy with low-energy tunable photons on oxygen-deficient iron-based oxypnictide superconductors NdFeAsO0.85 (Tc=52K) reveals a distinct photon-energy dependen…