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1. Thermally generated spin current in the topological insulator Bi 2 Se 3

   https://doi.org/10.1126/sciadv.adi4540  

   Jain, Rakshit ; Stanley, Max ; Bose, Arnab ; Richardella, Anthony R. ; Zhang, Xiyue S. ; Pillsbury, Timothy ; Muller, David A. ; Samarth, Nitin ; Ralph, Daniel C. ( December 2023 , Science Advances)

   We present measurements of thermally generated transverse spin currents in the topological insulator Bi₂Se₃, thereby completing measurements of interconversions among the full triad of thermal gradients, charge currents, and spin currents. We accomplish this by comparing the spin Nernst magneto-thermopower to the spin Hall magnetoresistance for bilayers of Bi₂Se₃/CoFeB. We find that Bi₂Se₃does generate substantial thermally driven spin currents. A lower bound for the ratio of spin current density to thermal gradient is$\frac{J_s}{{\mathbf{\nabla }}_{\mathit{x}}\mathit{T}}$= (4.9 ± 0.9) × 10⁶$\left(\frac{\hslash }{2e}\right)\frac{\mathbf{A}{\mathbf{m}}^{\mathbf{-}\mathbf{2}}}{\mathbf{K}\text{μ}{\mathbf{m}}^{\mathbf{-}\mathbf{1}}}$, and a lower bound for the magnitude of the spin Nernst ratio is −0.61 ± 0.11. The spin Nernst ratio for Bi₂Se₃is the largest among all materials measured to date, two to three times larger compared to previous measurements for the heavy metals Pt and W. Strong thermally generated spin currents in Bi₂Se₃can be understood via Mott relations to be due to an overall large spin Hall conductivity and its dependence on electron energy.

    

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2. Thermally tunable VO 2 -SiO 2 nanocomposite thin-film capacitors

   https://doi.org/10.1063/1.5011641  

   Sun, Yifei ; Narayanachari, K. V. ; Wan, Chenghao ; Sun, Xing ; Wang, Haiyan ; Cooley, Kayla A. ; Mohney, Suzanne E. ; White, Doug ; Duwel, Amy ; Kats, Mikhail A. ; et al ( March 2018 , Journal of Applied Physics)
3. Thermally Stable N 2 -Intercalated WO 3 Photoanodes for Water Oxidation

   https://doi.org/10.1021/ja3067622  

   Mi, Qixi ; Ping, Yuan ; Li, Yan ; Cao, Bingfei ; Brunschwig, Bruce S. ; Khalifah, Peter G. ; Galli, Giulia A. ; Gray, Harry B. ; Lewis, Nathan S. ( November 2012 , Journal of the American Chemical Society)
4. Kinetics of the Topochemical Transformation of (PbSe) m (TiSe 2 ) n (SnSe 2 ) m (TiSe 2 ) n to (Pb 0.5 Sn 0.5 Se) m (TiSe 2 ) n

   https://doi.org/10.1021/jacs.8b10681  

   Sutherland, Duncan R. ; Merrill, Devin R. ; Ditto, Jeffrey ; Moore, Daniel B. ; Medlin, Douglas ; Johnson, David C. ( January 2019 , Journal of the American Chemical Society)
5. Elucidating the Impact of Mg Substitution on the Properties of NASICON‐Na 3+ y V 2− y Mg y (PO 4 ) 3 Cathodes

   https://doi.org/10.1002/adfm.202105463  

   Ghosh, Subham ; Barman, Nabadyuti ; Gonzalez‐Correa, Eliovardo ; Mazumder, Madhulika ; Zaveri, Aryan ; Giovine, Raynald ; Manche, Alexis ; Pati, Swapan K. ; Clément, Raphaële J. ; Senguttuvan, Premkumar ( August 2021 , Advanced Functional Materials)

   Vanadium multiredox‐based NASICON‐Na_zV_2−yM_y(PO₄)₃(3 ≤z ≤ 4; M = Al³⁺, Cr³⁺, and Mn²⁺) cathodes are particularly attractive for Na‐ion battery applications due to their high Na insertion voltage (>3.5 V vs Na⁺/Na⁰), reversible storage capacity (≈150 mA h g⁻¹), and rate performance. However, their practical application is hindered by rapid capacity fade due to bulk structural rearrangements at high potentials involving complex redox and local structural changes. To decouple these factors, a series of Mg²⁺‐substituted Na_3+yV_2−yMg_y(PO₄)₃(0 ≤y ≤ 1) cathodes is studied for which the only redox‐active species is vanadium. While X‐ray diffraction (XRD) confirms the formation of solid solutions between they = 0 and 1 end members, X‐ray absorption spectroscopy and solid‐state nuclear magnetic resonance reveal a complex evolution of the local structure upon progressive Mg²⁺substitution for V³⁺. Concurrently, the intercalation voltage rises from 3.35 to 3.45 V, due to increasingly more ionic VO bonds, and the sodium (de)intercalation mechanism transitions from a two‐phase fory ≤ 0.5 to a solid solution process fory ≥ 0.5, as confirmed by in operando XRD, while Na‐ion diffusion kinetics follow a nonlinear trend across the compositional series.

    

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