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

Bae, Seokjin; Lee, Seunghun; Zhang, Xiaohang; Takeuchi, Ichiro; Anlage, Steven M.

doi:10.1103/PhysRevMaterials.3.124803

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

Journal Article · Mon Dec 30 00:00:00 EST 2019 · Physical Review Materials

DOI:https://doi.org/10.1103/PhysRevMaterials.3.124803· OSTI ID:1604579

^[1]; ^[2]; Zhang, Xiaohang ^[2]; Takeuchi, Ichiro ^[2]; ^[2]

Univ. of Maryland, College Park, MD (United States). Maryland Quantum Materials Center; University of Maryland
Univ. of Maryland, College Park, MD (United States). Maryland Quantum Materials Center

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.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Maryland, College Park, MD (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Grant/Contract Number:: SC0017931

OSTI ID:: 1604579

Journal Information:: Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 12 Vol. 3; ISSN PRMHAR; ISSN 2475-9953

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Majorana Fermion
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microwave resonator
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proximity effect
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Microwave Meissner screening properties of proximity-coupled topological-insulator / superconductor bilayers

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