Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 88: Electronic Structure of Surfaces II
O 88.1: Vortrag
Donnerstag, 4. April 2019, 15:00–15:15, H26
Probing the Surface States in β-Bi2Pd through YSR excitations — •Javier Zaldívar1, Carmen Rubio-Verdú1, Rubén Ibarrondo1, Edwin Herrera2, Isabel Guillamón2, Hermann Suderow2, and José Ignacio Pascual1,3 — 1CIC nanoGUNE, San Sebastián, Spain — 2Departamento de Física de la Materia Condensada, Instituto Nicolás Cabrera and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Spain — 3Ikerbasque, Basque Foundation for Science, Bilbao, Spain
β-Bi2Pd in its bulk form is a topological semimetal with spin-polarized surface states which has drawn attention on the possibility of hosting spin-triplet components in the superconducting phase [1][2]. Previous works relied on quasi-particle interference for the detection of the spin-polarized surface states in the normal state [3]. In this work, we propose an alternative route based on the analysis of the periodicities of the Yu-Shiba-Rusinov (YSR) wavefunction [4]. Using this procedure we have been able to identify the spin-polarized surface states in the superconducting condensate. Our results open the possibility of studying spin-triplet components in mixed singlet and triplet systems through magnetic impurities.
1. M. Sakano et al, Nat. Commun. 6, 8595(2015) 2. J. Kačmarčík et al, Phys. Rev. B 93, 144502(2016) 3. K. Iwaya et al, Nat. Commun. 8, 976(2017) 4. B. Heinrich et al., Prog. Surf. Sci. 93, 1 (2018)