@article{sun_wang_bloom_comstock_yang_mcconnell_clever_molitoris_lamont_cheng_et al._2024, title={Colossal anisotropic absorption of spin currents induced by chirality}, volume={10}, ISSN={["2375-2548"]}, DOI={10.1126/sciadv.adn3240}, abstractNote={The chiral induced spin selectivity (CISS) effect, in which the structural chirality of a material determines the preference for the transmission of electrons with one spin orientation over that of the other, is emerging as a design principle for creating next-generation spintronic devices. CISS implies that the spin preference of chiral structures persists upon injection of pure spin currents and can act as a spin analyzer without the need for a ferromagnet. Here, we report an anomalous spin current absorption in chiral metal oxides that manifests a colossal anisotropic nonlocal Gilbert damping with a maximum-to-minimum ratio of up to 1000%. A twofold symmetry of the damping is shown to result from differential spin transmission and backscattering that arise from chirality-induced spin splitting along the chiral axis. These studies reveal the rich interplay of chirality and spin dynamics and identify how chiral materials can be implemented to direct the transport of spin current.}, number={18}, journal={SCIENCE ADVANCES}, author={Sun, Rui and Wang, Ziqi and Bloom, Brian P. and Comstock, Andrew H. and Yang, Cong and McConnell, Aeron and Clever, Caleb and Molitoris, Mary and Lamont, Daniel and Cheng, Zhao-Hua and et al.}, year={2024}, month={May} }
 @article{kim_vetter_yan_yang_wang_sun_yang_comstock_li_zhou_et al._2023, title={Chiral-phonon-activated spin Seebeck effect}, volume={2}, ISSN={["1476-4660"]}, url={http://dx.doi.org/10.1038/s41563-023-01473-9}, DOI={10.1038/s41563-023-01473-9}, abstractNote={Utilization of the interaction between spin and heat currents is the central focus of the field of spin caloritronics. Chiral phonons possessing angular momentum arising from the broken symmetry of a non-magnetic material create the potential for generating spin currents at room temperature in response to a thermal gradient, precluding the need for a ferromagnetic contact. Here we show the observation of spin currents generated by chiral phonons in a two-dimensional layered hybrid organic-inorganic perovskite implanted with chiral cations when subjected to a thermal gradient. The generated spin current shows a strong dependence on the chirality of the film and external magnetic fields, of which the coefficient is orders of magnitude larger than that produced by the reported spin Seebeck effect. Our findings indicate the potential of chiral phonons for spin caloritronic applications and offer a new route towards spin generation in the absence of magnetic materials.}, journal={NATURE MATERIALS}, publisher={Springer Science and Business Media LLC}, author={Kim, Kyunghoon and Vetter, Eric and Yan, Liang and Yang, Cong and Wang, Ziqi and Sun, Rui and Yang, Yu and Comstock, Andrew H. and Li, Xiao and Zhou, Jun and et al.}, year={2023}, month={Feb} }
 @article{zhong_xi_jin_wang_ma_liu_zhou_2022, title={Enhancement of thermal percolation in composites: A two-dimensional case study}, volume={121}, ISSN={["1077-3118"]}, url={https://doi.org/10.1063/5.0093038}, DOI={10.1063/5.0093038}, abstractNote={We investigated the thermal conductivity (TC) of a two-dimensional composite consisting of matrices with low TC and nanowire fillers with high TC using the Monte Carlo method and the finite element method. Compared to the electrical percolation that requires direct contact between fillers, an additional thermal transport channel through non-contact fillers is found to be important for the thermal percolation in composites. This additional channel can lead to an effective expansion of thermal percolation network by including extra fillers into the network. Thus, it can be utilized to enhance the TC of the composite that is helpful to improve the performance of thermal interface materials.}, number={16}, journal={APPLIED PHYSICS LETTERS}, author={Zhong, Jinxin and Xi, Qing and Jin, Hongjie and Wang, Ziqi and Ma, Dengke and Liu, Jun and Zhou, Jun}, year={2022}, month={Oct} }