Zobrazeno 1 - 10
of 60
pro vyhledávání: '"L. Viciu"'
Autor:
L. Viciu, Minhyea Lee, Robert J. Cava, Robert A. Pascal, N. P. Ong, Yayu Wang, Lu Li, M. L. Foo, Satoshi Watauchi
Publikováno v:
Physica B: Condensed Matter. 403:1564-1568
We observe two distinct phases of Na x CoO 2 in the large Na-doping region ( x ⩾ 0.75 ), a pure phase H 2 , and a mixed phase H 2 + H 3 . The H 2 phase is characterized by a steep increase of the Peltier conductivity α defined as J = α ( - ∇ T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d8d6d37666acafa629da20c21b24541
https://doi.org/10.1016/j.physb.2007.10.320
https://doi.org/10.1016/j.physb.2007.10.320
Structure and basic magnetic properties of the honeycomb lattice compounds Na2Co2TeO6 and Na3Co2SbO6
Autor:
N. I. Greenbaum, Tyrel M. McQueen, Emilia Morosan, Robert J. Cava, Qingzhen Huang, Hendrik Willem Zandbergen, L. Viciu
Publikováno v:
Journal of Solid State Chemistry. 180:1060-1067
The synthesis, structure, and basic magnetic properties of Na2Co2TeO6 and Na3Co2SbO6 are reported. The crystal structures were determined by neutron powder diffraction. Na2Co2TeO6 has a two-layer hexagonal structure (space group P6322) while Na3Co2Sb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44b4b0f0b475d1133accb3c7245c004d
https://doi.org/10.1016/j.jssc.2007.01.002
https://doi.org/10.1016/j.jssc.2007.01.002
Autor:
Robert J. Cava, Tomasz Klimczuk, Minhyea Lee, V.L. Miller, H. W. Zandbergen, L. Viciu, N. M. van der Pers
Publikováno v:
Materials Research Bulletin. 41:1673-1680
The high pressure synthesis, structure and magnetic properties of Ca25Co22O56(OH)28 are reported. The compound has a misfit structure, consisting of double, square calcium oxide hydroxide rock-salt-like layers between hexagonal CoO2 layers. The misfi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16d61828e1500b5a2d5f9dccc27e86c5
https://doi.org/10.1016/j.materresbull.2006.02.023
https://doi.org/10.1016/j.materresbull.2006.02.023
Publikováno v:
Journal of Solid State Chemistry. 179:500-511
The reduced Ruddlesden–Popper phases, Sr3Co2O5+δ with δ = 0.9 1 , 0.64 and 0.38, have been prepared in a nitrogen atmosphere. The crystal structures were determined by powder neutron diffraction. Oxygen vacancies are found both in O(3) and O(4) s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be430abe372701ca79d982a89070590e
https://doi.org/10.1016/j.jssc.2005.11.013
https://doi.org/10.1016/j.jssc.2005.11.013
Publikováno v:
Key Engineering Materials. :1261-1264
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1004ffb255976f7c7d1b47608322cb70
https://doi.org/10.4028/www.scientific.net/kem.264-268.1261
https://doi.org/10.4028/www.scientific.net/kem.264-268.1261
Publikováno v:
Journal of Physics and Chemistry of Solids. 69:2986-2988
Utilizing high-resolution photoemission spectroscopy (ARPES) with fine-tuned polarization selection we present a systematic study of the insulating cobaltates. A single-particle gap opening is observed, suggesting an anisotropic particle–hole insta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9535bdb0184963fd22bb4a82961a1812
https://doi.org/10.1016/j.jpcs.2008.06.110
https://doi.org/10.1016/j.jpcs.2008.06.110
Autor:
Alexei V. Fedorov, David Hsieh, L. Viciu, Dong Qian, Lewis Wray, Yi-De Chuang, Robert J. Cava, M. Z. Hasan
Publikováno v:
Physical Review Letters. 101
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2057918d8d4960a9dc68ff429146f77d
https://doi.org/10.1103/physrevlett.101.089704
https://doi.org/10.1103/physrevlett.101.089704
Autor:
Qingzhen Huang, Tyrel M. McQueen, L. Viciu, Robert J. Cava, Jan-Willem G. Bos, Tomasz Klimczuk, Julian T. Hertz
Publikováno v:
Physical Review B. 77
The magnetic properties and structure of ${\mathrm{Li}}_{x}\mathrm{Co}{\mathrm{O}}_{2}$ for $0.5lxl1.0$ are reported. ${\mathrm{Co}}^{4+}$ is found to be high spin in ${\mathrm{Li}}_{x}\mathrm{Co}{\mathrm{O}}_{2}$ for $0.94\ensuremath{\leqslant}x\ens
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c31a2456769c57086213cf5a2f08563
https://doi.org/10.1103/physrevb.77.075119
https://doi.org/10.1103/physrevb.77.075119
Publikováno v:
Physical Review B. 75
The 4.3 K superconductor Na0.3CoO2 · 1.4H2O has been well studied since its discovery 1 because it may be a new type of superconductor based on magnetic interactions. Though other layered superconductors such as NaxTaS2 are known to remain supercond
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::309a70c834296b256f483394542d6d61
https://doi.org/10.1103/physrevb.75.014505
https://doi.org/10.1103/physrevb.75.014505
Autor:
Nanlin Wang, L. Viciu, Jianlin Luo, David Hsieh, Robert J. Cava, Lewis Wray, M. Z. Hasan, Dong Qian, Dingsong Wu
Publikováno v:
Physical Review Letters. 97
We utilize fine-tuned polarization selection coupled with excitation-energy variation of photoelectron signal to image the complete d-band dispersion relation in sodium cobaltates. A hybridization gap anticrossing is observed along the Brillouin zone
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::faa22333201a95c44f0d59c3c41368cd
https://doi.org/10.1103/physrevlett.97.186405
https://doi.org/10.1103/physrevlett.97.186405