RT Journal Article
T1 Increasing the number of topological nodal lines in semimetals via uniaxial pressure
A1 Otero Fumega, Adolfo
A1 Pardo Castro, Víctor
A1 Cortijo, Alberto
K1 Electronic structure
K1 Phase transitions and critical phenomena
K1 Topological matter
AB The application of pressure has been demonstrated to induce intriguing phase transitions intopological nodal-line semimetals. In this work we analyze how uniaxial pressure afects thetopological 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, wefnd the emergence of a second nodal line for pressures higher than 4 GPa. We examine the topologicalfeatures of both phases demonstrating that a nontrivial character is present in both of them. Thus,providing evidence of a topological-to-topological phase transition in which the number of topologicalnodal lines increases. The orbital overlap increase between Ba dxz and dyz orbitals and Sn pz orbitalsand the preservation of crystal symmetries are found to be responsible for the advent of thistransition. Furthermore, we pave the way to experimentally test this kind of transition by obtaining atopological relation between the zero-energy modes that arise in each phase when a magnetic feld isapplied
PB Springer Nature
YR 2021
FD 2021
LK http://hdl.handle.net/10347/26374
UL http://hdl.handle.net/10347/26374
LA eng
NO Fumega, A.O., Pardo, V. & Cortijo, A. Increasing the number of topological nodal lines in semimetals via uniaxial pressure. Sci Rep 11, 10574 (2021). https://doi.org/10.1038/s41598-021-90165-y
NO This work is supported by the MINECO of Spain through the project PGC2018-101334-B-C21. A.O.F. thanks MECD for the financial support received through the FPU grant FPU16/02572. A.C. acknowledges financial support through MINECO/AEI/FEDER, UE Grant No. FIS2015-73454- JIN and European Union structural funds, the Comunidad Autónoma de Madrid (CAM) NMAT2D-CM Program (S2018-NMT-4511), and the Ramón y Cajal program through the grant RYC2018-023938-I
DS Minerva
RD 3 may 2026