Issue 1, 2023
From the journal:

Nanoscale Advances

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

Vladimir V. Poborchii, ORCID logo *ab   Alexander V. Fokina  and  Alexander A. Shklyaevcd  

* Corresponding authors

a Ioffe Physico-Technical Institute, St. Petersburg 194021, Russia
E-mail: vladimir.poborchii@gmail.com

b National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8565, Japan

c Novosibirsk State University, 2 Pirogov Str., Novosibirsk 630090, Russia

d Rzhanov Institute of Semiconductor Physics SB RAS, 13 Lavrentiev Aven., Novosibirsk 630090, Russia

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.

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

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Article information

DOI
https://doi.org/10.1039/D2NA00590E
Article type
Paper
Submitted
02 Sep 2022
Accepted
14 Nov 2022
First published
19 Nov 2022
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2023,5, 220-227

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

V. V. Poborchii, A. V. Fokin and A. A. Shklyaev, Nanoscale Adv., 2023, 5, 220 DOI: 10.1039/D2NA00590E

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