Role of Valley Anisotropy in Optical Absorption of Monodisperse PbS Nanocrystals

Валентина Михайловна Литвяк, Роман Викторович Чербунин, Mikhail Nestoklon, Alexander Poddubny, Valerii Golubkov, Petr Onushchenko, Anastasiya Babkina, Alexei Onushchenko, Serguei Goupalov

Research output

2 Citations (Scopus)

Abstract

We study light absorption by nearly monodisperse PbS nanocrystals
grown in a glass matrix. The absorption spectra demonstrate a well-resolved
structure at energies above the first absorption peak. The absorption cross sections are calculated with an empirical tight-binding model accounting for the quantum confinement, the band anisotropy, and valley splittings. Absorption spectra measured at 4 K quantitatively agree with the atomistic calculations. This allows us to unambiguously ascribe the much-debated second absorption peak to the p−p optical transition and directly measure the splitting of excited p states.
Original languageEnglish
Pages (from-to)27766-27773
Number of pages8
JournalACS Nano
Publication statusPublished - 2017

Cite this

Литвяк, В. М., Чербунин, Р. В., Nestoklon, M., Poddubny, A., Golubkov, V., Onushchenko, P., ... Goupalov, S. (2017). Role of Valley Anisotropy in Optical Absorption of Monodisperse PbS Nanocrystals. ACS Nano, 27766-27773.
Литвяк, Валентина Михайловна ; Чербунин, Роман Викторович ; Nestoklon, Mikhail ; Poddubny, Alexander ; Golubkov, Valerii ; Onushchenko, Petr ; Babkina, Anastasiya ; Onushchenko, Alexei ; Goupalov, Serguei. / Role of Valley Anisotropy in Optical Absorption of Monodisperse PbS Nanocrystals. In: ACS Nano. 2017 ; pp. 27766-27773.
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abstract = "We study light absorption by nearly monodisperse PbS nanocrystalsgrown in a glass matrix. The absorption spectra demonstrate a well-resolvedstructure at energies above the first absorption peak. The absorption cross sections are calculated with an empirical tight-binding model accounting for the quantum confinement, the band anisotropy, and valley splittings. Absorption spectra measured at 4 K quantitatively agree with the atomistic calculations. This allows us to unambiguously ascribe the much-debated second absorption peak to the p−p optical transition and directly measure the splitting of excited p states.",
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Литвяк, ВМ, Чербунин, РВ, Nestoklon, M, Poddubny, A, Golubkov, V, Onushchenko, P, Babkina, A, Onushchenko, A & Goupalov, S 2017, 'Role of Valley Anisotropy in Optical Absorption of Monodisperse PbS Nanocrystals', ACS Nano, pp. 27766-27773.

Role of Valley Anisotropy in Optical Absorption of Monodisperse PbS Nanocrystals. / Литвяк, Валентина Михайловна; Чербунин, Роман Викторович; Nestoklon, Mikhail; Poddubny, Alexander; Golubkov, Valerii; Onushchenko, Petr; Babkina, Anastasiya; Onushchenko, Alexei; Goupalov, Serguei.

In: ACS Nano, 2017, p. 27766-27773.

Research output

TY - JOUR

T1 - Role of Valley Anisotropy in Optical Absorption of Monodisperse PbS Nanocrystals

AU - Литвяк, Валентина Михайловна

AU - Чербунин, Роман Викторович

AU - Nestoklon, Mikhail

AU - Poddubny, Alexander

AU - Golubkov, Valerii

AU - Onushchenko, Petr

AU - Babkina, Anastasiya

AU - Onushchenko, Alexei

AU - Goupalov, Serguei

PY - 2017

Y1 - 2017

N2 - We study light absorption by nearly monodisperse PbS nanocrystalsgrown in a glass matrix. The absorption spectra demonstrate a well-resolvedstructure at energies above the first absorption peak. The absorption cross sections are calculated with an empirical tight-binding model accounting for the quantum confinement, the band anisotropy, and valley splittings. Absorption spectra measured at 4 K quantitatively agree with the atomistic calculations. This allows us to unambiguously ascribe the much-debated second absorption peak to the p−p optical transition and directly measure the splitting of excited p states.

AB - We study light absorption by nearly monodisperse PbS nanocrystalsgrown in a glass matrix. The absorption spectra demonstrate a well-resolvedstructure at energies above the first absorption peak. The absorption cross sections are calculated with an empirical tight-binding model accounting for the quantum confinement, the band anisotropy, and valley splittings. Absorption spectra measured at 4 K quantitatively agree with the atomistic calculations. This allows us to unambiguously ascribe the much-debated second absorption peak to the p−p optical transition and directly measure the splitting of excited p states.

M3 - Article

SP - 27766

EP - 27773

JO - ACS Nano

JF - ACS Nano

SN - 1936-0851

ER -

Литвяк ВМ, Чербунин РВ, Nestoklon M, Poddubny A, Golubkov V, Onushchenko P et al. Role of Valley Anisotropy in Optical Absorption of Monodisperse PbS Nanocrystals. ACS Nano. 2017;27766-27773.