Effect of spin-phonon interaction on the Raman spectra of quasi-two-dimensional Heisenberg antiferromagnets

1995 ◽  
Vol 52 (2) ◽  
pp. 1025-1041 ◽  
Author(s):  
Dirk Uwe Saenger
Keyword(s):  
Raman Spectra ◽  
Two Dimensional ◽  
Phonon Interaction ◽  
Heisenberg Antiferromagnets

scholarly journals Raman spectra of two‐dimensional spin‐1/2 Heisenberg antiferromagnets

1994 ◽  
Vol 75 (10) ◽  
pp. 6340-6342 ◽  
Author(s):  
Stephan Haas ◽  
Elbio Dagotto ◽  
Jose Riera ◽  
Roberto Merlin ◽  
Franco Nori
Keyword(s):  
Raman Spectra ◽  
Two Dimensional ◽  
Heisenberg Antiferromagnets

Detection of Chemicals in Mixed, Two-Dimensional Raman Spectra

2010 ◽  
Author(s):  
David Gillis ◽  
Jacob Grun ◽  
Jeffrey Bowles
Keyword(s):  
Raman Spectra ◽  
Two Dimensional

Correlation-renormalized electron-phonon interaction in the two-dimensional Hubbard model

1999 ◽  
Vol 60 (14) ◽  
pp. 10442-10446 ◽  
Author(s):  
M. Mierzejewski ◽  
J. Zieliński ◽  
P. Entel
Keyword(s):  
Hubbard Model ◽  
Two Dimensional ◽  
Phonon Interaction ◽  
Electron Phonon Interaction

Raman spectra of twisted bilayer graphene close to the magic angle

2D Materials ◽  
2022 ◽  
Author(s):  
Tiago Campolina Barbosa ◽  
Andreij C. Gadelha ◽  
Douglas A. A. Ohlberg ◽  
Kenji Watanabe ◽  
Takashi Taniguchi ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Laser Excitation ◽  
Bilayer Graphene ◽  
Geometrical Model ◽  
Excitation Wavelength ◽  
Magic Angle ◽  
Phonon Interaction ◽  
Electron Phonon Interaction ◽  
Excitation Laser ◽  
Twisted Bilayer Graphene

Abstract In this work, we study the Raman spectra of twisted bilayer graphene samples as a function of their twist-angles (θ), ranging from 0.03º to 3.40º, where local θ are determined by analysis of their associated moiré superlattices, as imaged by scanning microwave impedance microscopy. Three standard excitation laser lines are used (457, 532, and 633 nm wavelengths), and the main Raman active graphene bands (G and 2D) are considered. Our results reveal that electron-phonon interaction influences the G band's linewidth close to the magic angle regardless of laser excitation wavelength. Also, the 2D band lineshape in the θ < 1º regime is dictated by crystal lattice and depends on both the Bernal (AB and BA) stacking bilayer graphene and strain soliton regions (SP) [1]. We propose a geometrical model to explain the 2D lineshape variations, and from it, we estimate the SP width when moving towards the magic angle.

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