Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Vitaly Proshchenko"'
Autor:
Yuri Dahnovsky, Vitaly Proshchenko
Publikováno v:
Journal of Magnetism and Magnetic Materials. 443:9-12
To explain three order of magnitude discrepancy between the experimental and calculated magnetic moments due to Zn vacancies in ZnS nanocrystals we study the effect of Zn vacancy distribution in a nanocrystal (NC). We consider small, intermediate, an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3d6c71939cef7435454000570cb300e
https://doi.org/10.1016/j.jmmm.2017.07.041
https://doi.org/10.1016/j.jmmm.2017.07.041
Publikováno v:
The Journal of Physical Chemistry C. 121:19401-19406
The dramatic drop of about 2.5 orders of magnitude in the Zn vacancy magnetization with nanocrystal (NC) size was experimentally found in ZnO quantum dots in vacuum and air. We explain such an unusual behavior by the different contributions of spatia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5d6e9d0baa59a9f101cd421a9583ecd
https://doi.org/10.1021/acs.jpcc.7b02990
https://doi.org/10.1021/acs.jpcc.7b02990
Publikováno v:
ACS Symposium Series ISBN: 9780841235540
ACS Symposium Series
ACS Symposium Series
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::efa292a8434f839a92b294c9db0bfcca
https://doi.org/10.1021/bk-2019-1331.ch013
https://doi.org/10.1021/bk-2019-1331.ch013
Role of substrate strain to tune energy bands–Seebeck relationship in semiconductor heterostructures
Publikováno v:
Journal of Applied Physics. 129:025301
In doped semiconductors and metals, the Seebeck coefficient or thermopower decreases monotonically with increasing carrier concentration in agreement with the Pisarenko relation. Here, we establish a fundamental mechanism to modulate and increase the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7a98647bbdc1b902a9a713843f756d7
https://doi.org/10.1063/5.0031523
https://doi.org/10.1063/5.0031523
Autor:
Dmitri Kilin, Svetlana Kilina, Yulun Han, Talgat Inerbaev, Aaron Forde, Stephanie J. Jensen, Shuping Huang, Yuruo Hua, Dimitri S. Kilin, Tijo Vazhappilly, David A. Micha, Dong Wang, Fei Li, Jian-Fu Chen, Hai-Feng Wang, Xiao-Ming Cao, Peijun Hu, Xue-Qing Gong, Brendan Barrow, Dhara J. Trivedi, Peng Cui, Mohammed Jabed, Dayton J. Vogel, Andrei Kryjevski, Brendan J. Gifford, Dan Ren, Jing Gao, Michael Grätzel, Henrik H. Kristoffersen, Jin Hyun Chang, Yu Zhang, Tammie Nelson, Sergei Tretiak, Bakhtiyor Rasulev, Ana Lončarić Božić, Dionysios D. Dionysiou, Hrvoje Kušić, Artem Pimachev, Robert D. Nielsen, Anri Karanovich, Vitaly Proshchenko, Yuri Dahnovsky, Xin-Ping Wu, Donald G. Truhlar, Clint N. Evrard, Andrew D. Mahler, Lee M. Thompson
Publikováno v:
The Journal of Physical Chemistry C. 120:11253-11261
We study d0 ferromagnetism in ZnS quantum dots (QDs) and nanowires (NW). To find the magnetization of the medium and large size nanocrystals (NC), we introduce the surface-bulk (SB) model where the separately calculated surface and bulk contributions
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::407703957572868fa44dd075bd3405b0
https://doi.org/10.1021/acs.jpcc.6b02191
https://doi.org/10.1021/acs.jpcc.6b02191
Publikováno v:
Physical Chemistry Chemical Physics. 18:26771-26776
We find a large enhancement in the efficiency of CdSe quantum dot sensitized solar cells by doping with manganese. In the presence of Mn impurities in relatively small concentrations (2.3%) the photoelectric current increases by up to 190%. The avera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b2e5fff0079b3cc6a4e6d4914bcf3434
https://doi.org/10.1039/c6cp04263e
https://doi.org/10.1039/c6cp04263e
Interstitial defects are inevitably present in doped semiconductors that enable modern-day electronic, optoelectronic or thermoelectric technologies. Understanding of stability of interstitials and their bonding mechanisms in the silicon lattice was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5bca7fe3ea14c69b69ee27731f66e313
http://arxiv.org/abs/1806.00217
http://arxiv.org/abs/1806.00217
Autor:
Yuri Dahnovsky, Vitaly Proshchenko
Publikováno v:
Chemical Physics. 461:58-62
Slow luminescence is studied in Mn doped CdS, ZnS, and ZnSe quantum dots. Because of the high degeneracy of Mn d-orbitals, we employ the multi-determinant SAC–CI computational method to determine the spin-forbidden transition from the 4 T 1 first e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3547b97eb078618585d733416941404f
https://doi.org/10.1016/j.chemphys.2015.09.001
https://doi.org/10.1016/j.chemphys.2015.09.001
Autor:
Vitaly Proshchenko, Yuri Dahnovsky
Publikováno v:
physica status solidi (b). 252:2275-2279
The concentration dependence of magnetic order of Mn-doped CdSe nanocrystals is studied. The distance between two Mn atoms imitates the concentration dependence. To do more accurate calculations, we cut three fragments out of a quantum dot and calcul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47db1d16923a115b73b763edcbdfd2ba
https://doi.org/10.1002/pssb.201552246
https://doi.org/10.1002/pssb.201552246