Zobrazeno 1 - 10
of 59
pro vyhledávání: '"V. Iota"'
Publikováno v:
Nature Materials. 6:34-38
Under standard conditions, carbon dioxide (CO2) is a simple molecular gas and an important atmospheric constituent, whereas silicon dioxide (SiO2) is a covalent solid, and one of the fundamental minerals of the planet. The remarkable dissimilarity be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf487c281b030c15f60bb6f3fb67bbe0
https://doi.org/10.1038/nmat1800
https://doi.org/10.1038/nmat1800
Publikováno v:
The Journal of Physical Chemistry B. 107:5922-5925
When β-nitrous oxide (Cmca N2O) is laser heated to between 2000 and 3400 K at high pressures (10−55 GPa), it disproportionates into an ionic form of dimeric nitrogen dioxide (NO+NO3-) and nitrogen. Raman spectra of the quenched products suggest th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2bd104e928c836fe9b59c18619ea742c
https://doi.org/10.1021/jp0275589
https://doi.org/10.1021/jp0275589
Autor:
Choong-Shik Yoo, V. Iota
Publikováno v:
Physical Review Letters. 86:5922-5925
The stability of CO(2) phases has been investigated up to 50 GPa and 750 K by in situ Raman spectroscopy and visual observations using externally heated diamond-anvil cells. A new phase (CO(2)-II) exists above 20 GPa and 500 K, which can be quenched
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24652bd2be8626518a0533f734dad538
https://doi.org/10.1103/physrevlett.86.5922
https://doi.org/10.1103/physrevlett.86.5922
Publikováno v:
physica status solidi (b). 223:427-433
We present a review of recent studies of carbon dioxide (CO 2 ) at high pressures and temperatures and describe the experimental evidence for a dipole interacting bent CO 2 phase IV and for a non-molecular extended phase V. Phase IV is stabilized abo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a16b456b35bf1712262cdc19ced78a38
https://doi.org/10.1002/1521-3951(200101)223:2<427::aid-pssb427>3.0.co
https://doi.org/10.1002/1521-3951(200101)223:2<427::aid-pssb427>3.0.co
Publikováno v:
Physical Review Letters. 84:4132-4135
We report a new phase transition in cobalt from the magnetic varepsilon(hcp) to a beta(fcc) phase, likely nonmagnetic, at 105 GPa. It occurs martensitically in an extended pressure region between 105 and 150 GPa without any apparent volume change. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7e6587b72f745ca6541ec3d263ea64f
https://doi.org/10.1103/physrevlett.84.4132
https://doi.org/10.1103/physrevlett.84.4132
Autor:
Giulia Galli, Francois Gygi, Hyunchae Cynn, Daniel Häusermann, V. Iota, Malcolm Nicol, Stefan Carlson, Christian Mailhiot, Choong-Shik Yoo
Publikováno v:
Physical Review Letters. 83:5527-5530
The crystal structures of two molecular phases (I and III) and a polymeric phase (V) of CO2 have been investigated to 60 GPa. CO2-1 (Pa3) transforms to CO2-III (Cmca) at 12 GPa with almost no change of density. Although CO2-III persists in Cmca to at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb7ee68a242f0aa39d74d901b2ae834c
https://doi.org/10.1103/physrevlett.83.5527
https://doi.org/10.1103/physrevlett.83.5527
Autor:
V. Iota, B. A. Weinstein
Publikováno v:
physica status solidi (b). 211:91-104
Deep defects are often assumed to be insensitive to applied pressure because of their localized character. However, in recent photoluminescence (PL) experiments, several deep acceptor bands in ZnSe were found to shift with pressure substantially fast
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61612c0f68d92576553a44fc5d7b6734
https://doi.org/10.1002/(sici)1521-3951(199901)211:1<91::aid-pssb91>3.0.co
https://doi.org/10.1002/(sici)1521-3951(199901)211:1<91::aid-pssb91>3.0.co
Autor:
V. Iota, B. A. Weinstein
Publikováno v:
Physical Review Letters. 81:4955-4958
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f72d9fbb142e7429f11baa028eeacfa
https://doi.org/10.1103/physrevlett.81.4955
https://doi.org/10.1103/physrevlett.81.4955
Publikováno v:
ChemInform. 30
An extended-solid phase, carbon dioxide phase V (CO2-V), was synthesized in a diamond anvil cell by laser heating the molecular orthorhombic phase, carbon dioxide phase III, above 40 gigapascals and 1800 kelvin. This new material can be quenched to a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f1e065a91ae11b722dd19679e675856b
https://doi.org/10.1002/chin.199919024
https://doi.org/10.1002/chin.199919024
Autor:
Alexei Kuznetsov, Jung-Fu Lin, György Vankó, Steven D. Jacobsen, Vitali B. Prakapenka, Choong-Shik Yoo, V. Iota, Viktor V. Struzhkin
Publikováno v:
Science (New York, N.Y.). 317(5845)
Mineral properties in Earth's lower mantle are affected by iron electronic states, but representative pressures and temperatures have not yet been probed. Spin states of iron in lower-mantle ferropericlase have been measured up to 95 gigapascals and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36f08e747571c3f1eca54fdceca7e8df
https://pubmed.ncbi.nlm.nih.gov/17885134
https://pubmed.ncbi.nlm.nih.gov/17885134