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. 2021 Jul 21;11:14859. doi: 10.1038/s41598-021-94260-y

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Time-dependent pressure profile for (a) fast and (b) slow compression cycles on Bi foil using the dDAC, and the corresponding voltage applied to the piezo actuator. The pressure was estimated from the Au pressure marker, as described in the text. The stars indicate the onset of the Bi-III/Bi-V transition. The average compression rates during the ramp are (a) 680 and (b) 0.56 GPa/s and the instantaneous compression rates at the transition are (a) 785 and (b) 1.13 GPa/s.