Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Ilias Efthimiopoulos"'
Autor:
Nicole Yvonne Suss, Eva M. Heppke, Elena Voloshina, Lukas Schifferle, Sergey S. Lobanov, Sergio Speziale, Hans Josef Reichmann, Tim Küllmey, Beate Paulus, Martin Lerch, Ilias Efthimiopoulos
Publikováno v:
AIP Advances, Vol 13, Iss 10, Pp 105128-105128-11 (2023)
Quaternary kesterite-type (KS) compounds have attracted worldwide attention from the scientific community as promising materials for solar cells. On the route to optimizing their performance, the effect of stress and strain constitutes a critical fac
Externí odkaz:
https://doaj.org/article/fcb7e4b74aea4c158710377ce590dc57
Publikováno v:
Solids, Vol 2, Iss 4, Pp 385-394 (2021)
We performed an in-depth investigation and analysis of the effect of temperature on the Raman-active A-modes of bulk kesterite-type Cu2ZnSnS4 within the 300–460 K temperature range. We acquired the individual contributions to each Raman mode, namel
Externí odkaz:
https://doaj.org/article/0693d9409f4a4969837526b3a07ffea0
Publikováno v:
ACS Omega, Vol 6, Iss 41, Pp 27387-27395 (2021)
Externí odkaz:
https://doaj.org/article/150e190e16f34bbea97f527acc5dddf2
Autor:
Ilias Efthimiopoulos, Elissaios Stavrou, Koichiro Umemoto, Sathish Mayanna, Antonius Torode, Jesse S. Smith, Stella Chariton, Vitali B. Prakapenka, Alexander F. Goncharov, Yuejian Wang
Publikováno v:
Physical Review B
We have studied the high-pressure vibrational and structural behavior of bulk graphite and graphene nanoplatelets at room temperature by means of high-pressure Raman spectroscopic and x-ray diffraction probes. We have detected a clear pressure-induce
Publikováno v:
Zeitschrift für Naturforschung B. 77:425-432
We have examined the effect of composition on the Raman-active vibrational response of the Cu2(Fe x Zn1−x )SnS4 and Cu2(Mn x Zn1−x )SnS4 solid solution series at ambient conditions. Based on these results we were able to identify the phase bounda
Autor:
Anna S. Pakhomova, Georg Spiekermann, Nicole Biedermann, Karen Appel, Wolfgang Morgenroth, Ilias Efthimiopoulos, Max Wilke, Konstantin Glazyrin, Jan Mueller, Elena Bykova
Publikováno v:
European Journal of Mineralogy. 32:575-586
The high-pressure phase transition of strontianite ( SrCO3 ) was investigated at ambient temperature by means of powder and single-crystal X-ray diffraction. The samples were compressed in a diamond anvil cell to a maximum pressure of 49 GPa. Structu
Autor:
Monika Koch-Müller, Lea Pennacchioni, Naira S. Martirosyan, Ilias Efthimiopoulos, Richard Wirth, Sandro Jahn
Publikováno v:
American Mineralogist
The high-pressure CaCO3 phase diagram has been the most extensively studied within the carbonates group. However, both the diverse mineralogy of carbonates and the abundance of solid solutions in natural samples require the investigation of multi-com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b346cde835b4b379c81c7d9cf9fd09c
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5003073
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5003073
Publikováno v:
ACS Omega
ACS Omega, Vol 6, Iss 41, Pp 27387-27395 (2021)
ACS Omega, Vol 6, Iss 41, Pp 27387-27395 (2021)
We carried out first-principles calculations to simulate Ag2ZnSnS4 and Ag2CdSnS4 and calculated enthalpies of different plausible structural models (kesterite-type, stannite-type, wurtzkesterite-type, wurtzstannite-type, and GeSb-type) to identify lo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::428978f78bc55dee1b49b2e5e6818c92
https://doi.org/10.1021/acsomega.1c04290
https://doi.org/10.1021/acsomega.1c04290
Autor:
Sven Neuber, Annekatrin Sill, Ilias Efthimiopoulos, Peter Nestler, Katja Fricke, Christiane A. Helm
Publikováno v:
Thin Solid Films. 745:139103
Publikováno v:
Journal of Physical Chemistry C
We have examined the effect of temperature and pressure on the Raman-active G-band of graphene nanoplatelets with an average thickness of 4 nm. Measuring the Raman mode frequency and width of the G-band as a function of temperature and pressure allow
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da668dd1898a4e4fb515defd7c2f9934
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5005405_3/component/file_5005829/5005405.pdf
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5005405_3/component/file_5005829/5005405.pdf