CrI3 magnetic nanotubes: A comparative DFT and DFT+U study, and strain effect | Научно-инновационный портал СФУ

CrI3 magnetic nanotubes: A comparative DFT and DFT+U study, and strain effect

Тип публикации: статья из журнала

Год издания: 2020

Идентификатор DOI: 10.1016/j.physe.2020.114205

Ключевые слова: band gap engineering, cri3, dft, ferromagnetism, nanotubes, strain effect

Аннотация: In this paper, structural and electronic properties of CrI3 magnetic nanotubes (NTs) are studied using density functional theory. Both armchair and zigzag CrI3 nanotubes demonstrate a high correlation in strain energy between each other independently on accounting the Hubbard correction. The strain energies decrease with expansion of the tube diameter making the tubes’ synthesis with a diameter larger than 45 Å to be energetically possible. The nanotubes of both zigzag and armchair chirality are ferromagnetic semiconductors with band gaps close to that of the CrI3 monolayer. The band gaps are suppressed by reducing the tube diameters due to the structural stress leading to deformation of the Cr–I crystal field and changes in the bond lengths. The external strain can be utilized to flexibly tune the electronic properties of CrI3 nanotubes with the desired spin-up/spin-down band gap ratio. Strong distortion of the octahedral Cr–I crystal field under compression results in nontrivial behavior in the spin-up band gap of (4, 4) tube. Stretching of tubes leads to the enhancement of the exchange energy that should result in higher Curie temperature, therefore providing a good platform for potential applications in spintronic nanodevices. © 2020 Elsevier B.V.

Ссылки на полный текст

Издание

Журнал: Physica E: Low-Dimensional Systems and Nanostructures

Выпуск журнала: Vol. 123

ISSN журнала: 13869477

Издатель: Elsevier B.V.114205

Авторы

  • Kuklin Artem (Siberian Fed Univ, 79 Svobodniy Av, Krasnoyarsk 660041, Russia; KTH Royal Inst Technol, Sch Engn Sci Chem Biotechnol & Hlth, Div Theoret Chem & Biol, S-10691 Stockholm, Sweden)
  • Visotin Maxim A. (Russian Acad Sci, Siberian Branch, Fed Res Ctr, KSC, Krasnoyarsk 660036, Russia)
  • Baek Woohyeon (Kyungpook Natl Univ, Dept Chem, 80 Daehak Ro, Daegu 41566, South Korea; Kyungpook Natl Univ, Green Nanomat Res Ctr, 80 Daehak Ro, Daegu 41566, South Korea)
  • Avramov Paul (Kyungpook Natl Univ, Dept Chem, 80 Daehak Ro, Daegu 41566, South Korea; Kyungpook Natl Univ, Green Nanomat Res Ctr, 80 Daehak Ro, Daegu 41566, South Korea)

Вхождение в базы данных

Информация о публикациях загружается с сайта службы поддержки публикационной активности СФУ. Сообщите, если заметили неточности.

Вы можете отметить интересные фрагменты текста, которые будут доступны по уникальной ссылке в адресной строке браузера.