Designing and unlocking the potential of double perovskites X2NaVCl6 (X = Rb, K) for green energy applications. - Asif, Sana Ullah; Qasim, Muhammad; Saeedi, Ahmad M.; Althomali, Raed H.; Alghamdi, Majed M.; El-Zahhar, Adel A.; Abdin, Muhammad Zain Ul; Shah, Syed Zuhair Abbas; Zafar, Saima; Solre, Gideon F. B. (International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics, 2026)