2018
DOI: 10.1021/acs.nanolett.7b04486
|View full text |Cite
|
Sign up to set email alerts
|

Second-Order Raman Scattering in Exfoliated Black Phosphorus

Abstract: Second-order Raman scattering has been extensively studied in carbon-based nanomaterials, for example, nanotube and graphene, because it activates normally forbidden Raman modes that are sensitive to crystal disorder, such as defects, dopants, strain, and so forth. The sp-hybridized carbon systems are, however, the exception among nanomaterials, where first-order Raman processes usually dominate. Here we report the identification of four second-order Raman modes, named D, D, D and D, in exfoliated black phosph… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
3
1
1

Citation Types

6
28
0

Year Published

2018
2018
2024
2024

Publication Types

Select...
9

Relationship

0
9

Authors

Journals

citations
Cited by 36 publications
(34 citation statements)
references
References 51 publications
6
28
0
Order By: Relevance
“…For a monolayer BP, there are only three vibration modes in the backscattering configuration. Explicitly, the cross‐plane Ag1 mode stems from the opposing vibrations of the top and bottom phosphorus atoms with respect to each other, the B 2 g mode describes the bond movement along the zigzag direction, and the Ag2 mode has a dominant component along the in‐plane armchair direction . For simplicity but without loss of generality, we consider the Ag2, B 2 g and Ag1 modes, respectively, move along the x , y and z directions, as shown in Fig.…”
Section: Resultssupporting
confidence: 89%
“…For a monolayer BP, there are only three vibration modes in the backscattering configuration. Explicitly, the cross‐plane Ag1 mode stems from the opposing vibrations of the top and bottom phosphorus atoms with respect to each other, the B 2 g mode describes the bond movement along the zigzag direction, and the Ag2 mode has a dominant component along the in‐plane armchair direction . For simplicity but without loss of generality, we consider the Ag2, B 2 g and Ag1 modes, respectively, move along the x , y and z directions, as shown in Fig.…”
Section: Resultssupporting
confidence: 89%
“…These modes evolve as red shifted peaks with decrease in sample thickness. Moreover, earlier studies on phonon dispersion and momentum histogram of BP suggest that the origin of red-shifted characteristics relative to the central peaks is from contributions in the zigzag direction, while the blue shifted characteristics evolve from the armchair direction [15]. This observation is essentially due to the in-plane anisotropy of BP.…”
Section: Resultsmentioning
confidence: 81%
“…For example, an electron-phonon interaction driven by an impurity, a localized defect, or an edge can generate phonon-defect modes known as D modes. Thanks to these D modes which are helpful in interpreting carrier mobility, level of doping, defects and phonon dispersion [15]. Accordingly, two such phonon-defect modes D 1 and D 2 are identified in the A 1 g and A 2 g regions, respectively for NPQDs.…”
Section: Resultsmentioning
confidence: 99%
“…Unlike hydrophilic filters, PTFE is not wetted by air humidity. [20] Pristine films produced with our method exhibited A g 1 /A g 2 ratio of 0.86, revealing very limited amount of oxygen degradation. Afterwards, the film was transferred onto the substrate by mechanical press.…”
Section: Perovskite Light-emitting Diodesmentioning
confidence: 84%