Zobrazeno 1 - 10
of 143
pro vyhledávání: '"Kalevi, Kokko"'
Autor:
Mikhail Kuzmin, Juha-Pekka Lehtiö, Zahra Jahanshah Rad, Svetlana V. Sorokina, Marko P. J. Punkkinen, Hannu-Pekka Hedman, Risto Punkkinen, Pekka Laukkanen, Kalevi Kokko
Publikováno v:
ACS Materials Au, Vol 2, Iss 2, Pp 204-214 (2021)
Externí odkaz:
https://doaj.org/article/f63dccdced084190a21772491368fcdc
Autor:
Joonas Isometsä, Zahra Jahanshah Rad, Tsun H. Fung, Hanchen Liu, Juha-Pekka Lehtiö, Toni P. Pasanen, Oskari Leiviskä, Mikko Miettinen, Pekka Laukkanen, Kalevi Kokko, Hele Savin, Ville Vähänissi
Publikováno v:
Crystals, Vol 13, Iss 4, p 667 (2023)
Germanium is an excellent material candidate for various applications, such as field effect transistors and radiation detectors/multijunction solar cells, due to its high carrier mobilities and narrow bandgap, respectively. However, the efficient pas
Externí odkaz:
https://doaj.org/article/8eee7eeb28bc4cb79d51591e4741e569
Autor:
Matti Ropo, Marko Punkkinen, Pekko Kuopanportti, Muhammad Yasir, Sari Granroth, Antti Kuronen, Kalevi Kokko
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
Abstract The adsorption of oxygen on bcc Fe–Cr(100) surfaces with two different alloy concentrations is studied using ab initio density functional calculations. Atomic-scale analysis of oxygen–surface interactions is indispensable for obtaining a
Externí odkaz:
https://doaj.org/article/c4f3113c77244c379bee7eef50bdb835
Autor:
Juha-Pekka Lehtiö, Zahra Jahanshah Rad, Marko Punkkinen, Risto Punkkinen, Mikhail Kuzmin, Pekka Laukkanen, Kalevi Kokko
Publikováno v:
Physical Review Materials. 6
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bee207bdb7a276145a7fcf1a74a4be27
https://doi.org/10.1103/physrevmaterials.6.094604
https://doi.org/10.1103/physrevmaterials.6.094604
Autor:
Masoud Ebrahimzadeh, Sami Vuori, Mikko Miettinen, Juha-Pekka Lehtiö, Sari Granroth, Marko P J Punkkinen, Zahra Sadat Jahanshah Rad, Risto Punkkinen, Mikhail Kuzmin, Pekka Laukkanen, Mika Lastusaari, Kalevi Kokko
Publikováno v:
Journal of Physics D: Applied Physics. 56:044001
Properties of oxidized InP surfaces, which are known to cause less electrical and optical losses than other III–V oxides, are relevant to develop the passivation of current and future applications of III–V crystals (e.g. lasers, detectors). We re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d91a239c47c0cbb5c26a3d80e0517914
https://doi.org/10.1088/1361-6463/aca259
https://doi.org/10.1088/1361-6463/aca259
Autor:
Jaakko Mäkelä, Antti Lahti, Marjukka Tuominen, Muhammad Yasir, Mikhail Kuzmin, Pekka Laukkanen, Kalevi Kokko, Marko P. J. Punkkinen, Hong Dong, Barry Brennan, Robert M. Wallace
Publikováno v:
Scientific Reports, Vol 9, Iss 1, Pp 1-14 (2019)
X-ray photoelectron spectroscopy (XPS) is one of the most used methods in a diverse field of materials science and engineering. The elemental core-level binding energies (BE) and core-level shifts (CLS) are determined and interpreted in the XPS. Oxid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doajarticles::de5db6059af2430952d0996fe146b8ea
http://link.springer.com/article/10.1038/s41598-018-37518-2
http://link.springer.com/article/10.1038/s41598-018-37518-2
Autor:
Masoud Ebrahimzadeh, Juha-Pekka Lehtiö, Marko Punkkinen, Risto Punkkinen, Mikko Miettinen, Zahra Sadat Jahanshah Rad, Mikhail Kuzmin, Pekka Laukkanen, Kalevi Kokko
Publikováno v:
Thin Solid Films. 757:139392
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::990ef0ca4edb21e53a633651ad34ef63
https://doi.org/10.1016/j.tsf.2022.139392
https://doi.org/10.1016/j.tsf.2022.139392
Autor:
Zahra Jahanshah Rad, Juha-Pekka Lehtiö, Kexun Chen, Iris Mack, Ville Vähänissi, Mikko Miettinen, Marko Punkkinen, Risto Punkkinen, Petri Suomalainen, Hannu-Pekka Hedman, Mikhail Kuzmin, Jekaterina Kozlova, Mihkel Rähn, Aile Tamm, Hele Savin, Pekka Laukkanen, Kalevi Kokko
Publikováno v:
Vacuum. 202:111134
Growing SiO2 layer by wet-chemical oxidation of Si surfaces before growth of another insulating film(s) is a used method to passivate Si interfaces in applications (e.g., solar cell, photodiode) at low temperatures (LT) below 450 oC. We report on pot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec6bb7dc5729876a5bfe3d6125f61d01
https://doi.org/10.1016/j.vacuum.2022.111134
https://doi.org/10.1016/j.vacuum.2022.111134
Publikováno v:
Computational Materials Science. 210:111011
In this paper we continue to develop our structural optimization algorithm built earlier on a numerical platform, the Genetic Hybrid Algorithm (GHA). Our goal now is to extend our algorithm to oxides, find an effective way to search for the known glo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f181eba45f8053249eaad716cb35cf4
https://doi.org/10.1016/j.commatsci.2021.111011
https://doi.org/10.1016/j.commatsci.2021.111011
Autor:
S. V. Sorokina, Pekka Laukkanen, Mikhail Kuzmin, Matti Punkkinen, Zahra Jahanshah Rad, Juha-Pekka Lehtiö, Kalevi Kokko
Publikováno v:
Physical Review B. 103
The close similarity of silicon and germanium, isoelectronic group-IV elements, makes the integration of Ge layers on Si substrates suitable for technology development, but the atomic and electronic structures of ${\mathrm{Si}}_{1\ensuremath{-}x}{\ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a442a98b0cc18d4b9398fbb4726994b8
https://doi.org/10.1103/physrevb.103.195312
https://doi.org/10.1103/physrevb.103.195312