Thermal conductivity of materials under pressure

Zhou, Yan; Dong, Zuoyuan; Hsieh, Wen‐Pin; Goncharov, Alexander F.; Chen, Xiao-Jia

doi:10.1038/s42254-022-00423-9

Cited by 70 publications

(29 citation statements)

References 264 publications

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“…We employed time-domain thermoreflectance (TDTR) to measure the thermal conductivity of He and Ar at high pressures and variable temperatures. In past decades, TDTR has enabled high-precision thermal conductivity measurements of various materials under a wide range of pressure and temperature conditions, with critical applications to physics, chemistry, materials science, and geosciences [ 35 , 36 , 37 , 38 , 39 ]. It is an ultrafast optical pump–probe method, where the output of a Ti:sapphire laser with a central wavelength of 785 nm and a repetition rate of 80 MHz was split into pump and probe beams.…”

Section: Methodsmentioning

confidence: 99%

Thermal Conductivity of Helium and Argon at High Pressure and High Temperature

2022

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Helium (He) and argon (Ar) are important rare gases and pressure media used in diamond-anvil cell (DAC) experiments. Their thermal conductivity at high pressure–temperature (P-T) conditions is a crucial parameter for modeling heat conduction and temperature distribution within a DAC. Here we report the thermal conductivity of He and Ar over a wide range of high P-T conditions using ultrafast time-domain thermoreflectance coupled with an externally heated DAC. We find that at room temperature the thermal conductivity of liquid and solid He shows a pressure dependence of P0.86 and P0.72, respectively; upon heating the liquid, He at 10.2 GPa follows a T0.45 dependence. By contrast, the thermal conductivity of solid Ar at room temperature has a pressure dependence of P1.25, while a T−1.37 dependence is observed for solid Ar at 19 GPa. Our results not only provide crucial bases for further investigation into the physical mechanisms of heat transport in He and Ar under extremes, but also substantially improve the accuracy of modeling the temperature profile within a DAC loaded with He or Ar. The P-T dependences of the thermal conductivity of He are important to better model and constrain the structural and thermal evolution of gas giant planets containing He.

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Section: Methodsmentioning

confidence: 99%

Thermal Conductivity of Helium and Argon at High Pressure and High Temperature

2022

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“…The thermal conductivity of minerals is critical to understanding the Earth's thermal balance and history 43 . The minimum thermal conductivity of MgCO 3 - C 2 /m and Mg 2 CO 4 - P 2 1 /c are calculated using Cahill’s model: …”

Section: Resultsmentioning

confidence: 99%

“…Earth's thermal balance and history 43 . The minimum thermal conductivity of MgCO 3 -C2/m and Mg 2 CO 4 -P2 1 /c are calculated using Cahill's model:…”

Section: Minimum Thermal Conductivity the Thermal Conductivity Of Min...mentioning

confidence: 99%

Comparative study on high-pressure physical properties of monoclinic MgCO3 and Mg2CO4

Liu

Sun

et al. 2022

Sci Rep

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The physical properties of Mg-carbonate at high temperature and pressure are crucial for understanding the deep carbon cycle. Here, we use first-principles calculations to study the physical properties of MgCO3-C2/m and Mg2CO4-P21/c under high pressure. The research shows that the structure and equation of state of MgCO3-C2/m are in good agreement with the experimental results, and the phase transition pressure of Mg2CO4 from pnma to P21/c structure is 44.66 GPa. By comparing the elastic properties, seismic properties and anisotropy of MgCO3-C2/m and Mg2CO4-P21/c, it is found that the elastic modulus and sound velocity of Mg2CO4-P21/c are smaller than those of MgCO3-C2/m, while the anisotropy is larger than that of MgCO3-C2/m. These results indicate that Mg2CO4-P21/c exists in the deep mantle and may be the main reason why carbonate cannot be detected. The minimum thermal conductivity of MgCO3-C2/m and Mg2CO4-P21/c is the largest in the [010] direction and the smallest in the [001] direction. The thermodynamic properties of MgCO3-C2/m and Mg2CO4-P21/c are predicted using the quasi-harmonic approximation (QHA) method.

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“…It is well known that high pressure is a clean way to adjust lattice structures and the corresponding electronic states in a systematic fashion [ 10 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. Hence, we measured ρ ( T ) for both ZrRuAs and HfRuP at various pressure.…”

Section: Resultsmentioning

confidence: 99%

Pressure-Tuning Superconductivity in Noncentrosymmetric Topological Materials ZrRuAs

Zhang

et al. 2022

Materials

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Recently, the hexagonal phase of ternary transition metal pnictides TT’X (T = Zr, Hf; T’ = Ru; X = P, As), which are well-known noncentrosymmetric superconductors, were predicted to host nontrivial bulk topology. In this work, we systematically investigate the electronic responses of ZrRuAs to external pressure. At ambient pressure, ZrRuAs show superconductivity with Tc ~ 7.74 K, while a large upper critical field ~ 13.03 T is obtained for ZrRuAs, which is comparable to the weak-coupling Pauli limit. The resistivity of ZrRuAs exhibits a non-monotonic evolution with increasing pressure. The superconducting transition temperature Tc increases with applied pressure and reaches a maximum value of 7.93 K at 2.1 GPa, followed by a decrease. The nontrivial topology is robust and persists up to the high-pressure regime. Considering both robust superconductivity and intriguing topology in this material, our results could contribute to studies of the interplay between topological electronic states and superconductivity.

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Thermal conductivity of materials under pressure

Cited by 70 publications

References 264 publications

Thermal Conductivity of Helium and Argon at High Pressure and High Temperature

Thermal Conductivity of Helium and Argon at High Pressure and High Temperature

Comparative study on high-pressure physical properties of monoclinic MgCO3 and Mg2CO4

Pressure-Tuning Superconductivity in Noncentrosymmetric Topological Materials ZrRuAs

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