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- W3043173040 abstract "Nodal-line semimetal surface states have been proposed to prompt strong correation effects, such as superconductivity or magnetism. The application of pressure has been demonstrated to induce intriguing phase transitions in these systems. In this work we analyze how uniaxial pressure affects the topological character of BaSn2, a Dirac nodal-line semimetal in the absence of spin-orbit coupling. Using calculations based on the density functional theory and a model tight-binding Hamiltonian, we find the emergence of a second nodal line for pressures higher than 4 GPa. Thus, applying pressure increases the number of edge states in the system. We examine the topological features of both phases demonstrating that a nontrivial character is present in both of them. The orbital overlap increase between Ba dxz and dyz orbitals and Sn pz orbitals is found to be responsible for the advent of this transition. Furthermore, we obtain a topological relation between the zero-energy modes that arise in each phase when a magnetic field is applied." @default.
- W3043173040 created "2020-07-23" @default.
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- W3043173040 date "2020-07-16" @default.
- W3043173040 modified "2023-10-14" @default.
- W3043173040 title "Uniaxial pressure induces a Lifshitz phase transition in BaSn2: A route to increase the number of topological nodal lines in semimetals" @default.
- W3043173040 hasPublicationYear "2020" @default.
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