Peter Zalom: Magnetic impurities interacting with gapped fermionic reservoirs
Begin: 16.06.2021, 14:30
Location: ZOOM Meeting ID: 99673611179

Title: Dariusz Kaczorowski: Dirac states in Pd-Bi superconductors: on the hunt for Majorana modes
Number: 33/21
Status: Closing date exceeded
Begin: Wednesday, 26.05. 2021, 14:10
Tutor: Ross H. Colman & Vladimír Sechovský
Location: ZOOM Meeting ID: 958 0426 7376

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We have a pleasure to invite you to attend the joint seminar
of the Department of Condensed Matter Physics (DCMP)
and the Materials Growth and Measurement Laboratory (MGML)




Dirac states in Pd-Bi superconductors: on the hunt for Majorana modes

lecture given by:

Dariusz Kaczorowski

Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wrocław, Poland
Meeting ID: 958 0426 7376 

on Wednesday, 26.5. 2021 from 14:10 CET (13.10 UTC) 

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Ross H. Colman & Vladimír Sechovský
On behalf of the DCMP and MGML


Topological superconductor (TSC) hosting Majorana bound states has been established as a milestone that might shift our scientific trajectory from fundamental research to practical applications in topological quantum computing. Recently, superconducting Pd-Bi binaries, due to their inherently large spin-orbit coupling strength, have attracted much attention as a possible platform for realization of the TSC phase. Here, we discuss the results of our comprehensive studies on the electronic structures of two such phases, namely PdBi and α-PdBi2, carried out by means of high-resolution angle- and spin-resolved photoemission spectroscopy, electrical transport and thermodynamic properties measurements, and band structure calculations [1-3]. In both materials, distinct Dirac states were revealed well below the chemical potential, which negated the possibility of obtaining TCS without proper tuning, e.g., by electrical gating. In the case of α-PdBi2, numerous surface Rashba states were found in the vicinity of the Fermi energy, which might be utilized to realize Majorana fermions.

This research was supported by the National Science Centre (Poland) under grant no. 2015/18/A/ST3/00057.

[1] M. Neupane, et al., Nat. Comm. 7, 13315 (2016).
[2] K. Dimitri, et al., Phys. Rev. B 97, 144514 (2018).
[3] J. Klotz, et al., Phys. Rev. B 101, 235139 (2020).