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Title: Microwave Meissner screening properties of proximity-coupled topological-insulator / superconductor bilayers

Abstract

The proximity-coupled topological-insulator / superconductor (TI/SC) bilayer system is a representative system to realize topological superconductivity. In order to better understand this unique state and enable future applications of the TI/SC bilayer, a comprehensive characterization and understanding of the microscopic properties of the bilayer are required. In this work, a microwave Meissner screening study, which exploits a high-precision microwave resonator technique, is conducted on the SmB6/YB6 thin-film bilayers as an example TI/SC system. The study reveals spatially dependent electrodynamic screening response of the TI/SC system that is not accessible to other techniques, from which the corresponding microscopic properties of a TI/SC bilayer can be obtained. The TI thickness dependence of the effective penetration depth suggests the existence of a bulk insulating region in the TI layer. The spatially dependent electrodynamic screening model analysis provides an estimate for the characteristic lengths of the TI/SC bilayer: normal penetration depth, normal coherence length, and the thickness of the surface states.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [1]
  1. Univ. of Maryland, College Park, MD (United States). Maryland Quantum Materials Center
Publication Date:
Research Org.:
Univ. of Maryland, College Park, MD (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1604579
Grant/Contract Number:  
SC0017931
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 3; Journal Issue: 12; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; topological superconductivity; proximity effect; Majorana Fermion; electrodynamics; microwave resonator; dielectric resonator; topological surface state; screening; Meissner effect; penetration depth; SmB6; YB6; hexa-boride; topological insulator

Citation Formats

Bae, Seokjin, Lee, Seunghun, Zhang, Xiaohang, Takeuchi, Ichiro, and Anlage, Steven M. Microwave Meissner screening properties of proximity-coupled topological-insulator / superconductor bilayers. United States: N. p., 2019. Web. https://doi.org/10.1103/PhysRevMaterials.3.124803.
Bae, Seokjin, Lee, Seunghun, Zhang, Xiaohang, Takeuchi, Ichiro, & Anlage, Steven M. Microwave Meissner screening properties of proximity-coupled topological-insulator / superconductor bilayers. United States. https://doi.org/10.1103/PhysRevMaterials.3.124803
Bae, Seokjin, Lee, Seunghun, Zhang, Xiaohang, Takeuchi, Ichiro, and Anlage, Steven M. Mon . "Microwave Meissner screening properties of proximity-coupled topological-insulator / superconductor bilayers". United States. https://doi.org/10.1103/PhysRevMaterials.3.124803. https://www.osti.gov/servlets/purl/1604579.
@article{osti_1604579,
title = {Microwave Meissner screening properties of proximity-coupled topological-insulator / superconductor bilayers},
author = {Bae, Seokjin and Lee, Seunghun and Zhang, Xiaohang and Takeuchi, Ichiro and Anlage, Steven M.},
abstractNote = {The proximity-coupled topological-insulator / superconductor (TI/SC) bilayer system is a representative system to realize topological superconductivity. In order to better understand this unique state and enable future applications of the TI/SC bilayer, a comprehensive characterization and understanding of the microscopic properties of the bilayer are required. In this work, a microwave Meissner screening study, which exploits a high-precision microwave resonator technique, is conducted on the SmB6/YB6 thin-film bilayers as an example TI/SC system. The study reveals spatially dependent electrodynamic screening response of the TI/SC system that is not accessible to other techniques, from which the corresponding microscopic properties of a TI/SC bilayer can be obtained. The TI thickness dependence of the effective penetration depth suggests the existence of a bulk insulating region in the TI layer. The spatially dependent electrodynamic screening model analysis provides an estimate for the characteristic lengths of the TI/SC bilayer: normal penetration depth, normal coherence length, and the thickness of the surface states.},
doi = {10.1103/PhysRevMaterials.3.124803},
journal = {Physical Review Materials},
number = 12,
volume = 3,
place = {United States},
year = {2019},
month = {12}
}

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