Breakdown of Three-dimensional Dirac Semimetal State in pressurized Cd3As2

Abstract

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.

17 pages, 4 figures

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Cited by in corpus (5)

• Exploring Topological Superconductivity in Topological Materials
• Strain-induced quantum topological phase transitions in Na3Bi
• Experimental evidence of crystal symmetry protection for the topological nodal line semimetal state in ZrSiS
• Strain-gradient induced topological transition in bent nanoribbons of the Dirac semimetal Cd3As2
• Strain-induced topological charge control in multifold fermion systems