致密化SiO$_2$玻璃退火过程中多晶型转变的证据
Evidence of polyamorphic transitions during densified SiO$_2$ glass annealing
AI总结：
通过原位X射线散射监测致密化SiO₂玻璃退火过程，发现密度涨落与中间程相干性在相同弛豫时间出现极大值，证实了中间过渡无序态及非晶-非晶转变，并表明从埃到5纳米尺度存在相似机制。
摘要：
对不同致密化SiO$_2$玻璃进行温度退火过程中，开展了原位X射线散射监测。来自X射线散射（SAXS）和衍射（WAXS）的密度涨落和中间程相干性在其演化过程中于相同弛豫时间出现极大值。这些极值证实了在两个更为有序的高密度和低密度非晶态之间存在一个中间过渡无序态。我们提出，该过渡态的存在证实了能量景观中存在两个巨型盆地，因此存在非晶-非晶转变。结合早期的拉曼结果，我们表明这种中间无序态意味着从几埃到5纳米的所有长度尺度上存在相似机制。
英文摘要：
In-situ X-ray scattering monitoring is carried out during temperature annealing on different densified SiO$_2$ glasses. Density fluctuations and intermediate range coherence from x-ray scattering (SAXS) and diffraction (WAXS) evidence a maximum in their evolution at the same relaxation time. These extrema confirm the existence of an intermediate transitory disordered state between the two more ordered high and low density amorphous states. We propose that the existence of this transitory state confirms the existence of two mega basin in the energy landscape and therefore an amorphous-amorphous transition. Including older Raman results, we show that this intermediate disorder state implies similar mechanisms at all length scales from a few angstroms to 5 nm.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
