Related Experiment Video
Updated: Feb 18, 2026
11:29
Novel 3D/VR Interactive Environment for MD Simulations, Visualization and Analysis
Published on: December 18, 2014
12.3K
Path-integral simulation of graphene monolayers under tensile stress
Carlos P Herrero1, Rafael Ramírez
1Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (CSIC), Campus de Cantoblanco, 28049 Madrid, Spain. ch@icmm.csic.es.
Physical Chemistry Chemical Physics : PCCP
|November 28, 2017
Summary
Quantum nuclear effects significantly impact graphene
Area of Science:
- Condensed Matter Physics
- Materials Science
- Computational Materials Science
Background:
- Graphene's finite-temperature properties are crucial for its applications.
- Understanding quantum effects in graphene requires advanced simulation methods.
- Tensile stress influences graphene's mechanical and thermal behavior.
Purpose of the Study:
- To investigate finite-temperature properties of graphene monolayers under tensile stress.
- To analyze the influence of quantum nuclear effects and anharmonicity.
- To compare path-integral molecular dynamics (PIMD) results with harmonic approximations.
Main Methods:
- Path-integral molecular dynamics (PIMD) simulations.
- Inclusion of vibrational mode quantization and anharmonic effects.
- Comparison with harmonic approximation calculations.
Main Results:
- Quantum nuclear effects are appreciable at low temperatures and noticeable at room temperature.
- These effects are enhanced by increased tensile stress, particularly for out-of-plane vibrations.
- Harmonic approximation is adequate for structural properties if ZA mode frequencies include pressure correction.
Conclusions:
- Quantum dynamics plays a significant role in graphene's properties, especially under stress.
- PIMD simulations provide a more accurate description than harmonic approximations for certain properties.
- Tensile stress and system size influence the relevance of quantum effects in graphene's out-of-plane motion.
