Thermal transport in graphene

In summary, there is a wide range of published values for the room temperature thermal conductivity of graphene, indicating its sensitivity to lattice defects. The thermal conductivity increases as temperature decreases, but drops at around 100K due to umklapp scattering. Doped graphene and graphene with vacancies have unique properties that are of interest. At low temperatures, the lattice dominates thermal transport with minimal electronic contribution. The question posed is how a magnetic field would affect the lattice of graphene, as graphene with vacancies has shown interesting magnetic properties. It is speculated that a magnetic field could induce different types of defects and greatly impact thermal conductivity, but there is limited research on this topic. Further exploration in this area is desirable.
  • #1
christopher.s
32
4
Published values for the room temperature thermal conductivity of graphene vary from ~2000 W/m*k to 5600 W/m*k, for freely suspended samples. The large discrepancy shows the sensitivity of graphene to lattice defects (contact with substrate, edge defects, etc.)

Thermal conductivity increases as temperature decreases, until about 100K, where it drops due to increased umklapp scattering. Doped graphene, or graphene with vacancies, has been shown to have some unique properties, and this is where my interest lies.

At low temperature, thermal transport is dominated by the lattice, with very little electronic contribution (>10%) My question; what happens to the lattice when graphene is subjected to a magnetic field? Graphene with vacancies has shown some very interesting magnetic properties, and would undoubtedly be effected in a magnetic field.

Curious as to your thoughts on this.
 
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  • #2
I'm sorry you are not generating any responses at the moment. Is there any additional information you can share with us? Any new findings?
 
  • #3
From what I can gather it does seem like a magnetic field could potentially induce different kinds of defects, including Frenkel defects, in a graphene lattice. It stands to reason that this could drastically effect the thermal conductivity. Unfortunately there is not a lot of research on this specific topic. It does seem like an attractive area to explore...

If anybody has more thoughts on the subject, I would love to hear them
 

1. What is thermal transport in graphene?

Thermal transport in graphene refers to the process of heat transfer through this two-dimensional material. Graphene has a unique thermal conductivity, which allows it to efficiently conduct heat and regulate temperature.

2. How does thermal transport in graphene differ from other materials?

Graphene has the highest thermal conductivity of any known material, making it a highly efficient heat conductor. It also has a unique ability to dissipate heat quickly, making it ideal for thermal management applications.

3. What are the applications of thermal transport in graphene?

Thermal transport in graphene has a wide range of applications, including in electronics, energy storage, and thermal management systems. It can also be used in biomedical devices and as a coating for heat dissipation.

4. What factors affect thermal transport in graphene?

The thermal conductivity of graphene is influenced by several factors, including its size, shape, and the presence of impurities or defects. Additionally, the temperature and surrounding environment can also impact thermal transport in graphene.

5. How is thermal transport in graphene being researched and studied?

Scientists are conducting studies and experiments to better understand the mechanisms behind thermal transport in graphene and to develop new applications for this material. Techniques such as Raman spectroscopy and thermal imaging are commonly used to study the thermal properties of graphene.

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