Enhanced exciton binding energy, Zeeman splitting and spin polarization in hybrid layered nanosheets comprised of (Cd, Mn)Se and nitrogen-doped graphene oxide: Implication for semiconductor devices

Oindrila Halder; Gyanadeep Mallik; Jan Suffczyński; Wojciech Pacuski; Kumar Shidhartha K. Varadwaj; Biswarup Satpati; Satchidananda Rath

doi:10.1088/1361-6528/abfdee

Enhanced exciton binding energy, Zeeman splitting and spin polarization in hybrid layered nanosheets comprised of (Cd, Mn)Se and nitrogen-doped graphene oxide: Implication for semiconductor devices

Oindrila Halder, Gyanadeep Mallik, Jan Suffczyński, Wojciech Pacuski, Kumar Shidhartha K. Varadwaj, Biswarup Satpati, Satchidananda Rath^*

^*Corresponding author for this work

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

Abstract

The exciton properties of (Cd,Mn)Se-NrGO (nitrogen doped reduced graphene oxide) hybrid layered nanosheets have been studied in a magnetic field up to 10 T and compared to those of (Cd,Mn)Se nanosheets. The temperature dependent photoluminescence reveals the hybridization of inter-band exciton and intra-center Mn transition with enhancement of the binding energy of exciton-Mn hybridized state (80 meV with respect to 60 meV in (Cd,Mn)Se nanosheets) and increase of exciton - phonon coupling strength to 90 meV (with respect to 55 meV in (Cd,Mn)Se nanosheets). The circularly polarized magneto - photoluminescence at 2 K provides evidence for magnetic field induced exciton spin polarization and the realization of excitonic giant Zeeman splitting with g eff as high as 165.4 10.3, much larger than in the case of (Cd,Mn)Se nanosheets (63.9 6.6), promising for implementation in spin active semiconductor devices.

Original language	English
Article number	325204
Journal	Nanotechnology
Volume	32
Issue number	32
DOIs	https://doi.org/10.1088/1361-6528/abfdee
State	Published - 6 Aug 2021
Externally published	Yes

Keywords

2D exciton
magneto-optical properties
photoluminescence
semiconductor nanosheets

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10.1088/1361-6528/abfdee

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Halder, O., Mallik, G., Suffczyński, J., Pacuski, W., Varadwaj, K. S. K., Satpati, B., & Rath, S. (2021). Enhanced exciton binding energy, Zeeman splitting and spin polarization in hybrid layered nanosheets comprised of (Cd, Mn)Se and nitrogen-doped graphene oxide: Implication for semiconductor devices. Nanotechnology, 32(32), Article 325204. https://doi.org/10.1088/1361-6528/abfdee

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title = "Enhanced exciton binding energy, Zeeman splitting and spin polarization in hybrid layered nanosheets comprised of (Cd, Mn)Se and nitrogen-doped graphene oxide: Implication for semiconductor devices",

abstract = "The exciton properties of (Cd,Mn)Se-NrGO (nitrogen doped reduced graphene oxide) hybrid layered nanosheets have been studied in a magnetic field up to 10 T and compared to those of (Cd,Mn)Se nanosheets. The temperature dependent photoluminescence reveals the hybridization of inter-band exciton and intra-center Mn transition with enhancement of the binding energy of exciton-Mn hybridized state (80 meV with respect to 60 meV in (Cd,Mn)Se nanosheets) and increase of exciton - phonon coupling strength to 90 meV (with respect to 55 meV in (Cd,Mn)Se nanosheets). The circularly polarized magneto - photoluminescence at 2 K provides evidence for magnetic field induced exciton spin polarization and the realization of excitonic giant Zeeman splitting with g eff as high as 165.4 10.3, much larger than in the case of (Cd,Mn)Se nanosheets (63.9 6.6), promising for implementation in spin active semiconductor devices.",

keywords = "2D exciton, magneto-optical properties, photoluminescence, semiconductor nanosheets",

author = "Oindrila Halder and Gyanadeep Mallik and Jan Suffczy{\'n}ski and Wojciech Pacuski and Varadwaj, {Kumar Shidhartha K.} and Biswarup Satpati and Satchidananda Rath",

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year = "2021",

month = aug,

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doi = "10.1088/1361-6528/abfdee",

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Halder, O, Mallik, G, Suffczyński, J, Pacuski, W, Varadwaj, KSK, Satpati, B & Rath, S 2021, 'Enhanced exciton binding energy, Zeeman splitting and spin polarization in hybrid layered nanosheets comprised of (Cd, Mn)Se and nitrogen-doped graphene oxide: Implication for semiconductor devices', Nanotechnology, vol. 32, no. 32, 325204. https://doi.org/10.1088/1361-6528/abfdee

Enhanced exciton binding energy, Zeeman splitting and spin polarization in hybrid layered nanosheets comprised of (Cd, Mn)Se and nitrogen-doped graphene oxide: Implication for semiconductor devices. / Halder, Oindrila; Mallik, Gyanadeep; Suffczyński, Jan et al.
In: Nanotechnology, Vol. 32, No. 32, 325204, 06.08.2021.

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

TY - JOUR

T1 - Enhanced exciton binding energy, Zeeman splitting and spin polarization in hybrid layered nanosheets comprised of (Cd, Mn)Se and nitrogen-doped graphene oxide

T2 - Implication for semiconductor devices

AU - Halder, Oindrila

AU - Mallik, Gyanadeep

AU - Suffczyński, Jan

AU - Pacuski, Wojciech

AU - Varadwaj, Kumar Shidhartha K.

AU - Satpati, Biswarup

AU - Rath, Satchidananda

PY - 2021/8/6

Y1 - 2021/8/6

N2 - The exciton properties of (Cd,Mn)Se-NrGO (nitrogen doped reduced graphene oxide) hybrid layered nanosheets have been studied in a magnetic field up to 10 T and compared to those of (Cd,Mn)Se nanosheets. The temperature dependent photoluminescence reveals the hybridization of inter-band exciton and intra-center Mn transition with enhancement of the binding energy of exciton-Mn hybridized state (80 meV with respect to 60 meV in (Cd,Mn)Se nanosheets) and increase of exciton - phonon coupling strength to 90 meV (with respect to 55 meV in (Cd,Mn)Se nanosheets). The circularly polarized magneto - photoluminescence at 2 K provides evidence for magnetic field induced exciton spin polarization and the realization of excitonic giant Zeeman splitting with g eff as high as 165.4 10.3, much larger than in the case of (Cd,Mn)Se nanosheets (63.9 6.6), promising for implementation in spin active semiconductor devices.

AB - The exciton properties of (Cd,Mn)Se-NrGO (nitrogen doped reduced graphene oxide) hybrid layered nanosheets have been studied in a magnetic field up to 10 T and compared to those of (Cd,Mn)Se nanosheets. The temperature dependent photoluminescence reveals the hybridization of inter-band exciton and intra-center Mn transition with enhancement of the binding energy of exciton-Mn hybridized state (80 meV with respect to 60 meV in (Cd,Mn)Se nanosheets) and increase of exciton - phonon coupling strength to 90 meV (with respect to 55 meV in (Cd,Mn)Se nanosheets). The circularly polarized magneto - photoluminescence at 2 K provides evidence for magnetic field induced exciton spin polarization and the realization of excitonic giant Zeeman splitting with g eff as high as 165.4 10.3, much larger than in the case of (Cd,Mn)Se nanosheets (63.9 6.6), promising for implementation in spin active semiconductor devices.

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KW - magneto-optical properties

KW - photoluminescence

KW - semiconductor nanosheets

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SN - 0957-4484

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Enhanced exciton binding energy, Zeeman splitting and spin polarization in hybrid layered nanosheets comprised of (Cd, Mn)Se and nitrogen-doped graphene oxide: Implication for semiconductor devices

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