Sökning: onr:"swepub:oai:DiVA.org:kth-24635" > Distortions and sta...
Fältnamn | Indikatorer | Metadata |
---|---|---|
000 | 03383naa a2200589 4500 | |
001 | oai:DiVA.org:kth-24635 | |
003 | SwePub | |
008 | 100920s2010 | |||||||||||000 ||eng| | |
009 | oai:DiVA.org:uu-136068 | |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-246352 URI |
024 | 7 | a https://doi.org/10.1073/pnas.10052791072 DOI |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-1360682 URI |
040 | a (SwePub)kthd (SwePub)uu | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a ref2 swepub-contenttype |
072 | 7 | a art2 swepub-publicationtype |
100 | 1 | a Mao, Wendy L.4 aut |
245 | 1 0 | a Distortions and stabilization of simple-cubic calcium at high pressure and low temperature |
264 | c 2010-05-17 | |
264 | 1 | b Proceedings of the National Academy of Sciences,c 2010 |
338 | a print2 rdacarrier | |
500 | a QC 20100920 | |
520 | a Ca-III, the first superconducting calcium phase under pressure, was identified as simple-cubic (sc) by previous X-ray diffraction (XRD) experiments. In contrast, all previous theoretical calculations showed that sc had a higher enthalpy than many proposed structures and had an imaginary (unstable) phonon branch. By using our newly developed submicrometer high-pressure single-crystal XRD, cryogenic high-pressure XRD, and theoretical calculations, we demonstrate that Ca-III is neither exactly sc nor any of the lower-enthalpy phases, but sustains the sc-like, primitive unit by a rhombohedral distortion at 300 K and a monoclinic distortion below 30 K. This surprising discovery reveals a scenario that the high-pressure structure of calcium does not go to the zero-temperature global enthalpy minimum but is dictated by high-temperature anharmonicity and low-temperature metastability fine-tuned with phonon stability at the local minimum. | |
650 | 7 | a NATURVETENSKAPx Fysik0 (SwePub)1032 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Physical Sciences0 (SwePub)1032 hsv//eng |
653 | a lattice-dynamics | |
653 | a phase | |
653 | a ca | |
653 | a vanadium | |
653 | a metals | |
653 | a sodium | |
653 | a TECHNOLOGY | |
653 | a TEKNIKVETENSKAP | |
653 | a Physics | |
700 | 1 | a Wang, Lin4 aut |
700 | 1 | a Ding, Yang4 aut |
700 | 1 | a Yang, Wenge4 aut |
700 | 1 | a Liu, Wenjun4 aut |
700 | 1 | a Kim, Duck Youngu Uppsala universitet,Institutionen för fysik och astronomi4 aut |
700 | 1 | a Luo, Weiu Uppsala universitet,KTH,Tillämpad materialfysik,Institutionen för fysik och astronomi4 aut0 (Swepub:uu)weluo226 |
700 | 1 | a Ahuja, Rajeevu Uppsala universitet,KTH,Tillämpad materialfysik,Institutionen för fysik och astronomi4 aut0 (Swepub:uu)rajeeva |
700 | 1 | a Meng, Yue4 aut |
700 | 1 | a Sinogeikin, Stas4 aut |
700 | 1 | a Shu, Jinfu4 aut |
700 | 1 | a Mao, Ho-kwang4 aut |
710 | 2 | a Uppsala universitetb Institutionen för fysik och astronomi4 org |
773 | 0 | t Proceedings of the National Academy of Sciences of the United States of Americad : Proceedings of the National Academy of Sciencesg 107:22, s. 9965-9968q 107:22<9965-9968x 0027-8424x 1091-6490 |
856 | 4 | u http://www.pnas.org/content/107/22/9965.full.pdf |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-24635 |
856 | 4 8 | u https://doi.org/10.1073/pnas.1005279107 |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-136068 |
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