T. Nomoto

Lattice softening and diffusive dynamics in the polar metal LiReO 3

Kantaro Murayama, Ryota Masuki, Cédric Tassel, Hideaki Sakai et autres

Polar metals, characterized by the nontrivial coexistence of metallicity and polar structural order, define an emerging frontier in quantum materials research. However, the interplay between their structural phase transitions and fluctuation dynamics remains poorly understood. Here, we reveal distinct diffusive dynamics in …

jp, de, fr, us (code pays fourni par la source)

Intertwined Charge and Spin Density Waves in a Topological Kagome Material

You-Sheng Chen, Jonathan Gaudet, Guy Marcus, T. Nomoto et autres

Using neutrons and x-rays we show the topological kagome antiferromagnet Mn$_3$Sn for $T<285$~K forms a homogeneous spin and charge ordered state comprising a longitudinally polarized spin density wave (SDW) with wavevector $\textbf{k}_β=k_β{\bf \hat{c}}$, a helical modulated version of the room temperature anti-chiral …

Spontaneous topological Hall effect induced by non-coplanar antiferromagnetic order in intercalated van der Waals materials

H. Takagi, R. Takagi, S. Minami, T. Nomoto et autres

In ferromagnets, electric current generally induces transverse Hall voltage in proportion to magnetization (anomalous Hall effect), and it is frequently used for electrical readout of the up and down spin states. While these properties are usually not expected in antiferromagnets, recent theoretical …

Quantum oscillations in a centrosymmetric skyrmion-hosting magnet GdRu2Si2

N. Matsuyama, T. Nomura, S. Imajo, T. Nomoto et autres

We have performed magnetic torque and resistivity measurements on a centrosymmetric skyrmion-host GdRu2Si2, in which the dominant magnetic interaction leading to skyrmion formation is under debate. We observe both the de Haas-van Alphen and Shubnikov-de Haas oscillations in the forced ferromagnetic phase. …