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Paper detail

Breakdown of Three-dimensional Dirac Semimetal State in pressurized Cd3As2

We report the first observation of a pressure-induced breakdown of the 3D-DSM state in Cd3As2, evidenced by a series of in-situ high-pressure synchrotron X-ray diffraction (XRD) and single crystal transport measurements. We find that Cd3As2 undergoes a structural phase transition from a metallic tetragonal (T) phase in space group I41/acd to a semiconducting monoclinic (M) phase in space group P21/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 3D-DSM state in pressurized Cd3As2.

preprint2015arXivOpen access
Shan ZhangQi WuLeslie SchoopMazhar N. AliYouguo ShiNi NiQuinn GibsonVladimir SidorovWei YiJing GuoYazhou ZhouPeiwen GaoDachun GuChao ZhangSheng JiangKe YangAiguo LiYanchun LiXiaodong LiJing LiuXi DaiZhong FangRobert J. CavaLiling SunZhongxian Zhao
cond-mat.supr-concond-mat.mtrl-sci
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Shan ZhangQi WuLeslie SchoopMazhar N. AliYouguo ShiNi NiQuinn GibsonVladimir SidorovWei YiJing GuoYazhou ZhouPeiwen GaoDachun GuChao ZhangSheng JiangKe YangAiguo LiYanchun LiXiaodong LiJing LiuXi DaiZhong FangRobert J. CavaLiling SunZhongxian Zhao

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