Di Yi

Sep 2, 2024 | nature.com | Yunpeng Zheng |Qinghua Zhang |Zhifang Zhou |YuJun Zhang |Changpeng Lin |Weigang Ma | +7 more

AbstractThermoelectrics converting heat and electricity directly attract broad attentions. To enhance the thermoelectric figure of merit, zT, one of the key points is to decouple the carrier-phonon transport. Here, we propose an entropy engineering strategy to realize the carrier-phonon decoupling in the typical SrTiO3-based perovskite thermoelectrics. By high-entropy design, the lattice thermal conductivity could be reduced nearly to the amorphous limit, 1.25 W m−1 K−1.

Jul 15, 2024 | nature.com | Yongjian Tang |Yuejie Zhang |Wanjun Jiang |Qinghua Zhang |Lin Gu |Pu Yu | +5 more

AbstractMagnons, bosonic quasiparticles carrying angular momentum, can flow through insulators for information transmission with minimal power dissipation. However, it remains challenging to develop a magnon-based logic due to the lack of efficient electrical manipulation of magnon transport. Here we show the electric excitation and control of multiferroic magnon modes in a spin-source/multiferroic/ferromagnet structure.

Apr 26, 2023 | nature.com | Hai Zhong |Di Yi |Yuri Suzuki |Daniel C. Ralph |Yuejie Zhang |Jiamian Hu

AbstractWe present room-temperature measurements of magnon spin diffusion in epitaxial ferrimagnetic insulator MgAl0.5Fe1.5O4 (MAFO) thin films near zero applied magnetic field where the sample forms a multi-domain state. Due to a weak uniaxial magnetic anisotropy, the domains are separated primarily by 180° domain walls.