Breakdown of three-dimensional Dirac semimetal state in pressurizedCd3As2

Autor:	Quinn Gibson, Wei Yi, Zhongxian Zhao, Vladimir A. Sidorov, Yanchun Li, Yazhou Zhou, Shan Zhang, Qi Wu, Desheng Wu, Dachun Gu, Sheng Jiang, Shang Jiang, Jing Guo, Robert J. Cava, Leslie M. Schoop, Peiwen Gao, Liling Sun, Ke Yang, Xiaodong Li, Chao Zhang, Youguo Shi, Mazhar N. Ali, Xi Dai, Jing Liu, Aiguo Li, Ni Ni, Zhong Fang
Rok vydání:	2015
Předmět:	Physics Tetragonal crystal system Electron mobility Condensed matter physics Topological insulator Phase (matter) Dirac (software) Crystal structure Condensed Matter Physics Semimetal Electronic Optical and Magnetic Materials Monoclinic crystal system
Zdroj:	Physical Review B. 91
ISSN:	1550-235X 1098-0121
Popis:	We report an observation of a pressure-induced breakdown of the three-dimensional Dirac semimetal (3DDSM) state in Cd3As2, evidenced by a series of in situ high-pressure synchrotron x-ray diffraction and single-crystal transport measurements. We find that Cd3As2 undergoes a structural phase transition from a metallic tetragonal phase in space group I4(1)/acd to a semiconducting monoclinic phase in space group P2(1)/c at critical pressure 2.57 GPa; above this pressure, an activation energy gap appears, accompanied by distinct switches in Hall resistivity slope and electron mobility. These changes of crystal symmetry and corresponding transport properties manifest the breakdown of the 3DDSM state in pressurized Cd3As2.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::29765a356912c1a8fb308de1b6bf403c https://doi.org/10.1103/physrevb.91.165133 Zobrazit plný text záznamu