Optical properties of extreme tellurium nanowires formed in subnanometer-diameter channels

Vladimir V. Poborchii; Alexander V. Fokin; Alexander A. Shklyaev

doi:10.1039/d2na00590e

Optical properties of extreme tellurium nanowires formed in subnanometer-diameter channels

Vladimir V. Poborchii, Alexander V. Fokin, Alexander A. Shklyaev

Laboratory of functional diagnostics of low-dimensional structures for nanoelectronics

Research output: Contribution to journal › Article › peer-review

Abstract

Single tellurium (Te) chains attract much attention as extreme nanowires with unique electronic and spintronic properties. Here, we encapsulate Te from a melt into channels of zeolites AFI (∼0.73 nm-channel diameter) and mordenite (MOR, ∼0.67 × 0.7 nm² channel cross-section) via high-pressure injection. Using polarized Raman and optical absorption spectra (RS and OAS) of zeolite single crystals with Te (AFI-Te and MOR-Te), we discriminate between features of Te chains and rings formed in the zeolites. We demonstrate good agreement of AFI-Te-chain RS and OAS with the calculated single Te-helix phonon and electron spectra. This suggests a very weak interaction of the AFI-Te-chain with the zeolite and its nearly perfect helix structure lacking inversion/mirror symmetry. An AFI-Te OAS feature, attributed to the electron transitions between Te-helix-Rashba-split valence and conduction bands confirms its 1D-electron-band origin with predicted possibilities of identifying Majorana fermions, manipulating spin transport and realizing topological superconductivity.

Original language	English
Pages (from-to)	220-227
Number of pages	8
Journal	Nanoscale Advances
Volume	5
Issue number	1
DOIs	https://doi.org/10.1039/d2na00590e
Publication status	Published - 19 Nov 2022

OECD FOS+WOS

1.03 PHYSICAL SCIENCES AND ASTRONOMY
2.11 OTHER ENGINEERING AND TECHNOLOGIES
1.04 CHEMICAL SCIENCES
2.05 MATERIALS ENGINEERING

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title = "Optical properties of extreme tellurium nanowires formed in subnanometer-diameter channels",

abstract = "Single tellurium (Te) chains attract much attention as extreme nanowires with unique electronic and spintronic properties. Here, we encapsulate Te from a melt into channels of zeolites AFI (∼0.73 nm-channel diameter) and mordenite (MOR, ∼0.67 × 0.7 nm2 channel cross-section) via high-pressure injection. Using polarized Raman and optical absorption spectra (RS and OAS) of zeolite single crystals with Te (AFI-Te and MOR-Te), we discriminate between features of Te chains and rings formed in the zeolites. We demonstrate good agreement of AFI-Te-chain RS and OAS with the calculated single Te-helix phonon and electron spectra. This suggests a very weak interaction of the AFI-Te-chain with the zeolite and its nearly perfect helix structure lacking inversion/mirror symmetry. An AFI-Te OAS feature, attributed to the electron transitions between Te-helix-Rashba-split valence and conduction bands confirms its 1D-electron-band origin with predicted possibilities of identifying Majorana fermions, manipulating spin transport and realizing topological superconductivity.",

author = "Poborchii, {Vladimir V.} and Fokin, {Alexander V.} and Shklyaev, {Alexander A.}",

note = "Funding Information: We thank V. N. Bogomolov for mordenite, J. Caro for AFI-crystals and S. G. Romanov for MOR-Te fabrication. Alexander Shklyaev is grateful to the Ministry of Science and Higher Education of the Russian Federation, project # 075-15-2020-797 (13.1902.21.0024). Publisher Copyright: {\textcopyright} 2023 RSC.",

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AU - Poborchii, Vladimir V.

AU - Fokin, Alexander V.

AU - Shklyaev, Alexander A.

N1 - Funding Information: We thank V. N. Bogomolov for mordenite, J. Caro for AFI-crystals and S. G. Romanov for MOR-Te fabrication. Alexander Shklyaev is grateful to the Ministry of Science and Higher Education of the Russian Federation, project # 075-15-2020-797 (13.1902.21.0024). Publisher Copyright: © 2023 RSC.

PY - 2022/11/19

Y1 - 2022/11/19

N2 - Single tellurium (Te) chains attract much attention as extreme nanowires with unique electronic and spintronic properties. Here, we encapsulate Te from a melt into channels of zeolites AFI (∼0.73 nm-channel diameter) and mordenite (MOR, ∼0.67 × 0.7 nm2 channel cross-section) via high-pressure injection. Using polarized Raman and optical absorption spectra (RS and OAS) of zeolite single crystals with Te (AFI-Te and MOR-Te), we discriminate between features of Te chains and rings formed in the zeolites. We demonstrate good agreement of AFI-Te-chain RS and OAS with the calculated single Te-helix phonon and electron spectra. This suggests a very weak interaction of the AFI-Te-chain with the zeolite and its nearly perfect helix structure lacking inversion/mirror symmetry. An AFI-Te OAS feature, attributed to the electron transitions between Te-helix-Rashba-split valence and conduction bands confirms its 1D-electron-band origin with predicted possibilities of identifying Majorana fermions, manipulating spin transport and realizing topological superconductivity.

AB - Single tellurium (Te) chains attract much attention as extreme nanowires with unique electronic and spintronic properties. Here, we encapsulate Te from a melt into channels of zeolites AFI (∼0.73 nm-channel diameter) and mordenite (MOR, ∼0.67 × 0.7 nm2 channel cross-section) via high-pressure injection. Using polarized Raman and optical absorption spectra (RS and OAS) of zeolite single crystals with Te (AFI-Te and MOR-Te), we discriminate between features of Te chains and rings formed in the zeolites. We demonstrate good agreement of AFI-Te-chain RS and OAS with the calculated single Te-helix phonon and electron spectra. This suggests a very weak interaction of the AFI-Te-chain with the zeolite and its nearly perfect helix structure lacking inversion/mirror symmetry. An AFI-Te OAS feature, attributed to the electron transitions between Te-helix-Rashba-split valence and conduction bands confirms its 1D-electron-band origin with predicted possibilities of identifying Majorana fermions, manipulating spin transport and realizing topological superconductivity.

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Optical properties of extreme tellurium nanowires formed in subnanometer-diameter channels

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