Composition evolution of crystal structure and negative thermal expansion in pyro-vanadate–phosphate Cu1.8Zn0.2V2–xPxO7. - Kawakita, M.; Ikawa, F.; Yagi, K.; Kano, M.; Kubo, T.; Yokoyama, Y.; Katayama, N.; Okamoto, Y.; Hirai, D.; Takenaka, K. (Applied Physics Letters, 2025)