412 citations · 1.9k across the 28 of their papers we have counts for
29 papers
Significant modulation of acoustoelectric current associated with charge density wave transitions
Natsumi Nikaido, Takuya Kawada, Koji Fujiwara +5
We studied acoustoelectric (AE) currents in materials that undergo charge density wave (CDW) transitions, induced by a surface acoustic wave (SAW) on a piezoelectric substrate. The…
Nonreciprocity reversal of magnetoacoustic attenuation in NiFe alloy thin films
Mingran Xu, Kei Yamamoto, Kouta Kondou +8
Nonreciprocity, the asymmetry of transport, underlies technologies from the diode to the microwave isolator. In a ferromagnet, a surface acoustic wave generates an elliptical effec…
Evidence for spin swapping from modulation of transverse resistance in magnetic heterostructures with Rashba interface
Heeman Kim, Shutaro Karube, Juan Borge +3
We investigate the transverse response under the out-of-plane magnetic field for magnetic heterostructures with Cu/Bi2O3 or Ag/Bi2O3 Rashba interfaces. We detect opposite contribut…
Thickness dependence of diode efficiency in superconducting Fe(Se,Te)/FeTe thin-film heterostructure devices
Kaito Arizono, Kenshin Inamura, Kouta Kondou +4
The superconducting diode effect (SDE) is a nonreciprocal transport phenomenon, in which the superconducting critical current density depends on the polarity of the current. It has…
Identifying the origin of out-of-plane spin polarization in the noncollinear antiferromagnet MnGe
Mingxing Wu, Kouta Kondou, Taishi Chen +2
The noncollinear antiferromagnets MnSn/Ge emerge as promising spin-current sources with both in-plane and out-of-plane spin polarizations, thereby enabling field-free magnetiza…
Spin Hall effect in van der Waals ferromagnet FeGeTe
Tomoharu Ohta, Yuto Samukawa, Nan Jiang +5
We investigate the spin Hall effect (SHE) in a van der Waals (vdW) ferromagnet FeGeTe (FGT) with a Curie temperature of 310 K utilizing the spin-torque ferr…
Crossover between intrinsic and temperature-assisted regimes in spin-orbit torque switching of antiferromagnetic order
Takumi Matsuo, Tomoya Higo, Daisuke Nishio-Hamane +7
Intensive studies have been made on antiferromagnets as candidate materials for next generation memory bits due to their ultrafast dynamics reaching picosecond time scales. Recent…
Harmonic and Subharmonic Magnon Generation in a Surface Acoustic Wave Resonator
Yunyoung Hwang, Liyang Liao, Jorge Puebla +6
We experimentally observe the generation of magnon harmonics and subharmonics in an on-chip surface acoustic wave resonator incorporating a thin CoFeB film, us…
Observation of chiral domain walls in an octupole-ordered antiferromagnet
Moeta Tsukamoto, Zhewen Xu, Tomoya Higo +10
Spin chirality in antiferromagnets offers new opportunities for spintronics. The kagome antiferromagnet Mn3Sn is a paradigmatic material in which the antiferromagnetic order parame…
Strongly Coupled Spin Waves and Surface Acoustic Waves at Room Temperature
Yunyoung Hwang, Jorge Puebla, Kouta Kondou +8
Here, we report the observation of strong coupling between magnons and surface acoustic wave (SAW) phonons in a thin CoFeB film constructed in an on-chip SAW resonator by analyzing…
Spontaneous spin selectivity in chiral molecules at the interface
Kouta Kondou, Shinji Miwa, Daigo Miyajima
Chirality-induced spin selectivity (CISS) has been extensively studied over the past two decades. While current-induced spin polarization in chiral molecules is widely recognized a…
Current-in-plane magnetoresistance in chiral-molecule/ferromagnetic metal bilayer due to thermally induced spin polarization
Kouta Kondou, Masanobu Shiga, Shoya Sakamoto +7
We report chirality-induced current-in-plane magnetoresistance (CIP-MR) in chiral molecule/ferromagnetic metal bilayer at room temperature. The previously reported chiralityinduced…
Chirality-induced effective magnetic field in a phthalocyanine molecule
Shinji Miwa, Kouta Kondou, Shoya Sakamoto +4
Chirality in organic molecules has attracted considerable attention in the fields of chemistry, biology, and spintronics. This paper reports on perpendicular magnetization hysteres…
Electrical Manipulation of a Topological Antiferromagnetic State
Hanshen Tsai, Tomoya Higo, Kouta Kondou +9
Electrical manipulation of emergent phenomena due to nontrivial band topology is a key to realize next-generation technology using topological protection. A Weyl semimetal is a thr…
Enhancement of acoustic spin pumping by acoustic distributed Bragg reflector cavity
Yunyoung Hwang, Jorge Puebla, Mingran Xu +3
Surface acoustic waves (SAWs) in the GHz frequency range can inject spin currents dynamically into adjacent nonmagnetic layers via spin pumping effect associated with ferromagnetic…
Non-trivial charge-to-spin conversion in ferromagnetic metal/Cu/Al2O3 by orbital transport
Junyeon Kim, Dongwook Go, Hanshen Tsai +4
Efficient spin/charge interconversion is desired to develop innovative spin-based devices. So far, the interconversion has been performed by using heavy atomic elements, strong spi…
Propagating spin excitations along skyrmion strings
S. Seki, M. Garst, J. Waizner +6
Magnetic skyrmions, topological solitons characterized by a two-dimensional swirling spin texture, have recently attracted attention as stable particle-like objects. In a three-dim…
Evaluation of spin diffusion length and spin Hall angle of antiferromagnetic Weyl semimetal MnSn
P. K. Muduli, T. Higo, T. Nishikawa +6
Antiferromagnetic Weyl semimetal MnSn has shown to generate strong intrinsic anomalous Hall effect (AHE) at room temperature, due to large momentum-space Berry curvature from t…
Phenomenological model for the direct and inverse Edelstein effects
Hironari Isshiki, Prasanta Muduli, Junyeon Kim +2
We have developed a phenomenological model that connects the direct and the inverse Edelstein effects. Our model implies a trade-off relation between the conversion coefficients fo…
Phase Boundary Exchange Coupling in the Mixed Magnetic Phase Regime of a Pd-doped FeRh Epilayer
J. R. Massey, K. Matsumoto, M. Strungaru +8
Spin-wave resonance measurements were performed in the mixed magnetic phase regime of a Pd-doped FeRh epilayer that appears as the first-order ferromagnetic-antiferromagnetic phase…
Inverse Edelstein effect induced by magnon - phonon coupling
Mingran Xu, Jorge Puebla, Florent Auvray +3
We demonstrate a spin to charge current conversion via magnon-phonon coupling and inverse Edelstein effect on the hybrid device Ni/Cu(Ag)/BiO. The generation of spin cu…
Clear variation of spin splitting by changing electron distribution at non-magnetic metal/Bi2O3 interfaces
Hanshen Tsai, Shutaro Karube, Kouta Kondou +3
Large spin splitting at Rashba interface, giving rise to strong spin-momentum locking, is essential for efficient spin-to-charge conversion. Recently, a Cu/Bismuth oxide (Bi2O3) in…
Evaluation of bulk-interface contributions to Edelstein magnetoresistance at metal/oxide interfaces
Junyeon Kim, Yan-Ting Chen, Shutaro Karube +4
We report a systematic study on Edelstein magnetoresistance (Edelstein MR) in Co25Fe75/Cu/Bi2O3 heterostructures with a strong spin-orbit interaction at the Cu/Bi2O3 interface. We…
Important role of magnetization precession angle measurement in inverse spin Hall effect induced by spin pumping
Surbhi Gupta, Rohit Medwal, Daichi Kodama +3
Here, we investigate spin Hall angle of Pt in Ni80Fe20/Pt bilayer system by using a broadband spin pumping and inverse spin Hall effect measurement. An out-of-plane excitation geom…