Revealing the origin of PL evolution of InSe flake induced by laser irradiation

Wang, Jing; Yue, Xiaofei; Zhu, Jingjing; Hu, Laigui; Liu, Ran; Cong, Chunxiao; Qiu, Zhijun

doi:10.1039/d3ra00324h

Cited by 1 publication

(1 citation statement)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, Raman spectroscopy can be used to determine the thickness of exfoliated materials, since vibrational modes can be sensitive to the number of layers as reported for 2D materials such as graphene [33] or MoS 2 [34]. However, for some materials and depending on the experimental conditions [31,35], the Raman laser power can induce damage on very thin flakes under prolonged exposure time, which must be considered for a proper preliminary characterization. In BSCCO-2212 flakes, Raman spectroscopy combined with TEM has been used to study the deterioration of the flakes surface when exposed to moisture [26] but a thorough Raman study of the BSCCO-2212 flakes has not been discussed.…”

Section: Introductionmentioning

confidence: 99%

Apparent color and Raman vibrational modes of the high-temperature superconductor Bi₂Sr₂CaCu₂O 8+δ exfoliated flakes

Figueruelo-Campanero,

del Campo,

Nieva

et al. 2024

2D Mater.

View full text Add to dashboard Cite

Studying and controlling the properties of individual exfoliated materials is one of the first steps towards the fabrication of complex van der Waals systems. In this work, we present a systematic study of optical properties and micro-Raman spectroscopy on exfoliated flakes of the high-temperature superconductor Bi2Sr2CaCu2O8+δ (BSCCO-2212). We demonstrate that these are quick and non-invasive techniques for studying air sensitive materials. The apparent color of BSCCO-2212 exfoliated flakes on SiO2/Si has allowed a rough and fast identification of the number of layers. By analyzing the optical contrast of different flakes we determined the complex refractive index in the visible range and found the optimal combination of illumination wavelength and substrate properties for the identification of flakes with different thickness. In addition, we report the hardening of the most characteristic Raman modes as flake thickness decreases, possibly caused by strain in the BiO and CuO2 planes. Moreover, the evolution of the Raman modes establishes a second approach to determine the thickness of BSCCO-2212 thin flakes. As BSCCO-2212 is a challenging material due to its sensitivity to ambient conditions, the present work provides a guide for the fabrication and characterization of complex van der Waals systems paving the way for studying heterostructures based on unconventional superconductors in the 2D limit.

show abstract

Section: Introductionmentioning

confidence: 99%

Apparent color and Raman vibrational modes of the high-temperature superconductor Bi₂Sr₂CaCu₂O 8+δ exfoliated flakes

Figueruelo-Campanero,

del Campo,

Nieva

et al. 2024

2D Mater.

View full text Add to dashboard Cite

show abstract

Revealing the origin of PL evolution of InSe flake induced by laser irradiation

Abstract: This work reveals the origin of PL evolution of InSe flake induced by weak and strong laser irradiation and provides a reliable experimental supplement to the photo oxidation study of InSe and opens up a new avenue to regulate the PL of InSe.

Cited by 1 publication

References 50 publications

Apparent color and Raman vibrational modes of the high-temperature superconductor Bi₂Sr₂CaCu₂O 8+δ exfoliated flakes

Apparent color and Raman vibrational modes of the high-temperature superconductor Bi₂Sr₂CaCu₂O 8+δ exfoliated flakes

Contact Info

Product

Resources

About

Revealing the origin of PL evolution of InSe flake induced by laser irradiation

Abstract: This work reveals the origin of PL evolution of InSe flake induced by weak and strong laser irradiation and provides a reliable experimental supplement to the photo oxidation study of InSe and opens up a new avenue to regulate the PL of InSe.

Cited by 1 publication

References 50 publications

Apparent color and Raman vibrational modes of the high-temperature superconductor Bi2Sr2CaCu2O 8+δ exfoliated flakes

Apparent color and Raman vibrational modes of the high-temperature superconductor Bi2Sr2CaCu2O 8+δ exfoliated flakes

Contact Info

Product

Resources

About

Apparent color and Raman vibrational modes of the high-temperature superconductor Bi₂Sr₂CaCu₂O 8+δ exfoliated flakes

Apparent color and Raman vibrational modes of the high-temperature superconductor Bi₂Sr₂CaCu₂O 8+δ exfoliated flakes