Polytypism, polymorphism, and superconductivity in TaSe₂₋ₓTeₓ

• Published in: Proceedings of the National Academy of Sciences - PNAS Vol. 112; no. 11; pp. E1174 - E1180
• Main Authors: Luo, Huixia, Xie, Weiwei, Tao, Jing, Inoue, Hiroyuki, Gyenis, András, Krizan, Jason W., Yazdani, Ali, Zhu, Yimei, Cava, Robert Joseph
• Format: Journal Article
• Language: English
• Published: National Academy of Sciences 17.03.2015; National Acad Sciences
• Series: PNAS Plus
• Subjects: chemical structure; Physical Sciences; PNAS Plus; selenium; tellurium; temperature

Polymorphism in materials often leads to significantly different physical properties—the rutile and anatase polymorphs of TiO ₂ are a prime example. Polytypism is a special type of polymorphism, occurring in layered materials when the geometry of a repeating structural layer is maintained but the la...