The thermal conductivity of iron alloys at high pressures and temperatures is a critical parameter in governing (a) the present-day heat flow out of Earth’s core, (b) the inferred age of Earth’s inner core, and (c) the thermal evolution of Earth’s core and lowermost mantle. It is, however, one of the least well-constrained important geophysical parameters, with current estimates for end-member iron under core-mantle boundary conditions varying by about a factor of 6. Here, the current state of calculations, measurements, and inferences that constrain thermal conductivity at core conditions are reviewed. The applicability of the Wiedemann-Franz law, commonly used to convert electrical resistivity data to thermal conductivity data, is probed: Here, whether the constant of proportionality, the Lorenz number, is constant at extreme conditions is of vital importance. Electron-electron inelastic scattering and increases in Fermi-liquid-like behavior may cause uncertainties in thermal conductivities derived from...

中文翻译：

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地核的热导率：一个关键地球物理参数的约束和不确定性

铁合金在高压和高温下的热导率是控制 (a) 当今地核外热流、(b) 推断的地球内核年龄和 (c) 地核的热演化的关键参数。地球的核心和最低地幔。然而，它是受约束最少的重要地球物理参数之一，目前对地核-地幔边界条件下端元铁的估计变化约为 6 倍。 这里，计算、测量和推论的当前状态审查了在核心条件下限制热导率的方法。探讨了通常用于将电阻率数据转换为热导率数据的 Wiedemann-Franz 定律的适用性：这里，比例常数、洛伦兹数、在极端条件下保持恒定至关重要。电子-电子非弹性散射和类费米液体行为的增加可能会导致源自...的热导率的不确定性。