Engineering Topological Nodal Line Semimetals in Rashba Spin-Orbit Coupled Atomic Chains
by
Paola Gentile 1,2,*, Vittorio Benvenuto 2, Carmine Ortix 2,3, Canio Noce 1,2
and Mario Cuoco 1,2,*
Paola Gentile 1,2,*, Vittorio Benvenuto 2, Carmine Ortix 2,3, Canio Noce 1,2 and Mario Cuoco 1,2,*
1
CNR-SPIN, I-84084 Fisciano, Salerno, Italy
2
Dipartimento di Fisica “E.R. Caianiello”, Università degli Studi di Salerno, Via G. Paolo II, 132, I-84084 Fisciano, Salerno, Italy
3
Institute for Theoretical Physics, Center for Extreme Matter and Emergent Phenomena, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands
*
Authors to whom correspondence should be addressed.
Condens. Matter 2019, 4(1), 25; https://doi.org/10.3390/condmat4010025
Received: 30 January 2019 / Revised: 13 February 2019 / Accepted: 15 February 2019 / Published: 16 February 2019
(This article belongs to the Special Issue Majorana Fermions and Topological Materials Science)
In this paper, we study an atomic chain in the presence of modulated charge potential and modulated Rashba spin-orbit coupling (RSOC) of equal periods. We show that for commensurate periodicities, with integer n, the three-dimensional synthetic space obtained by sliding the two phases of the charge potential and RSOC features a topological nodal-line semimetal protected by an anti-unitary particle-hole symmetry. The location and shape of the nodal lines strongly depend on the relative amplitude between the charge potential and RSOC.
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Keywords:
topological phases; spin-orbit coupled systems; semimetals
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MDPI and ACS Style
Gentile, P.; Benvenuto, V.; Ortix, C.; Noce, C.; Cuoco, M. Engineering Topological Nodal Line Semimetals in Rashba Spin-Orbit Coupled Atomic Chains. Condens. Matter 2019, 4, 25.
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