Heat transport by phonons and the generation of heat by fast phonon processes in ferroelastic materials

Ding, Xiangdong; Salje, Ekhard K. H.

doi:10.1063/1.4921899

Cited by 13 publications

(6 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several calculations indicate that ferroelectric and ferroelastic domain walls have a large effect on phonon transport, and hence heat flux [177][178][179][180][181]. For example, a single domain wall in lead titanate increases by up to 20% the thermal resistance of a bulk sample [180].…”

Section: Domain Walls As Phonon Filtersmentioning

confidence: 99%

Optical studies of ferroelectric and ferroelastic domain walls

Nataf

Guennou

2020

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Recent studies carried out with atomic force microscopy or high-resolution transmission electron microscopy reveal that ferroic domain walls can exhibit different physical properties than the bulk of the domains, such as enhanced conductivity in insulators, or polar properties in non-polar materials. In this review we show that optical techniques, in spite of the diffraction limit, also provide key insights into the structure and physical properties of ferroelectric and ferroelastic domain walls. We give an overview of the uses, specificities and limits of these techniques, and emphasize the properties of the domain walls that they can probe. We then highlight some open questions of the physics of domain walls that could benefit from their use.

show abstract

Section: Domain Walls As Phonon Filtersmentioning

confidence: 99%

Optical studies of ferroelectric and ferroelastic domain walls

Nataf

Guennou

2020

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

“…Here we will show that the nucleation and growth of twin boundaries reduces thermal conductivity if the heat flow is perpendicular to the twin walls, which act as phonon barriers. By using strain to manipulate the twin pattern, the thermal conductivity can be reversibly controlled [83].…”

Section: Strain-controlled Thermal Conductivity and Thermal Memorymentioning

confidence: 99%

Statistics of twinning in strained ferroelastics

Ding¹,

Aktas²,

Wang³

et al. 2017

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

In this review, we show that the evolution of the microstructure and kinetics of ferroelastic crystals under external shear can be explored by computer simulations of 2D model materials. We find that the nucleation and propagation of twin boundaries in ferroelastics depend sensitively on temperature. In the plastic regime, the evolution of the ferroelastic microstructure under strain deformation maintains a stick-and-slip mechanism in all temperature regimes, whereas the dynamic behavior changes dramatically from power-law statistics at low temperature to a Kohlrausch law at intermediate temperature, and then to a Vogel-Fulcher law at high temperature. In the yield regime, the distribution of jerk energies follows power-law statistics in all temperature regimes for a large range of strain rates. The non-spanning avalanches in the yield regime follow a parabolic temporal profile. The changes of twin pattern and twin boundaries density represent an important step towards domain boundary engineering.

show abstract

“…[45][46][47] It has been demonstrated that inorganic ferroelastic materials can be utilized for thermal management applications. 44,[48][49][50] Sieradzki et al studied the changes in the thermal conductivity of Li 2 -TiGeO 5 ceramics in the ferroelastic phase transition or domain formation. 50 Wang et al reported the difference in thermal conductivity values of layered PdSe 2 before and aer ferroelastic phase transition by uniaxial compression and demonstrated that the high ratio of the switchable thermal conductivity value between the two phases could be utilized for exibility and thermal management.…”

Section: Introductionmentioning

confidence: 99%