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

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

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

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.

Язык оригиналаанглийский
Страницы (с-по)220-227
Число страниц8
ЖурналNanoscale Advances
Том5
Номер выпуска1
DOI
СостояниеОпубликовано - 19 нояб. 2022

Предметные области OECD FOS+WOS

  • 1.03 ФИЗИЧЕСКИЕ НАУКИ И АСТРОНОМИЯ
  • 2.11 ПРОЧИЕ ТЕХНОЛОГИИ
  • 1.04 ХИМИЧЕСКИЕ НАУКИ
  • 2.05 ТЕХНОЛОГИЯ МАТЕРИАЛОВ

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