Volume 120, Number 2, October 2017
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||08 January 2018|
Quasiparticle interference in two-dimensional topological crystalline superconductors
National Lab of Solid State Microstructures and Department of Physics, Nanjing University - Nanjing, 210093, China
Received: 18 October 2017
Accepted: 18 December 2017
Quasiparticle interference (QPI) caused by impurity (elastic) scattering has provided a notable tool for revealing the topological superconducting gap and its symmetry. Here, we extend this method to the many-impurities scattering case and study the many-impurities QPI patterns for the interfaced bilayer Rashba topological superconductors, which possess intriguing Majorana Ising anisotropy under the magnetic field. For three possible pairing symmetry potentials, hosting the helical Majorana edge states, the unique features associated with Majorana Ising spin are identified in the QPI patterns, whose prominent features are still robust for many-impurities scattering. We show that the distinct scattering structures and symmetry properties of the QPI patterns can be used to uniquely identify the pairing symmetry and the corresponding direction of Majorana Ising spin, which are very distinguishable experimentally.
PACS: 74.20.Rp – Pairing symmetries (other than s-wave) / 74.55.+v – Tunneling phenomena: single particle tunneling and STM / 74.70.-b – Superconducting materials other than cuprates
© EPLA, 2018
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