activity
20102026
most citedFermi level dependent charge-to-spin current conversion by Dirac surface state of topological insulators

412 citations · 825 across the 8 of their papers we have counts for

collaborators

9 papers

cond-mat.mes-hall2026

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…

cond-mat.mtrl-sci2026

Quasi-One-Dimensional Electronic Nature of Ta4SiTe4 Underlying the Giant Thermoelectric Performance

Hironari Isshiki, Ayumu Tabata, Masafumi Horio +13

Ta4SiTe4 is a one-dimensional van der Waals material that exhibits an exceptionally large thermoelectric power factor below room temperature. However, since this material has been…

cond-mat.mes-hall2026

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…

cond-mat.mtrl-sci2025

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…

cond-mat.mtrl-sci2024

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…

cond-mat.mes-hall2023

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…

cond-mat.mtrl-sci2015★ 412 cited

Fermi level dependent charge-to-spin current conversion by Dirac surface state of topological insulators

K. Kondou, R. Yoshimi, A. Tsukazaki +6

The spin-momentum locking at the Dirac surface state of a topological insulator (TI) offers a distinct possibility of a highly efficient charge-to-spin current (C-S) conversion com…

cond-mat.mes-hall2012★ 42 cited

The spin Hall effect as a probe of nonlinear spin fluctuations

D. H. Wei, Y. Niimi, B. Gu +3

The spin Hall effect and its inverse play key roles in spintronic devices since they allow conversion of charge currents to and from spin currents. The conversion efficiency strong…

cond-mat.mes-hall2010★ 371 cited

Indication of intrinsic spin Hall effect in 4d and 5d transition metals

M. Morota, Y. Niimi, K. Ohnishi +4

We have investigated spin Hall effects in 4 and 5 transition metals, Nb, Ta, Mo, Pd and Pt, by incorporating the spin absorption method in the lateral spin valve structure; w…