Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Z. S. Teweldemedhin and"'
Autor:
Z. S. Teweldemedhin and, Myung-Hwan Whangbo, Janice L. Musfeldt, Zhengtao Zhu, Martha Greenblatt, H.-J. Koo and
Publikováno v:
Chemistry of Materials. 14:2607-2615
We report the 300 K polarized reflectance spectra and calculated electronic band structures of a series monophosphate tungsten bronzes, (PO2)4(WO3)2m (m = 2, 4, 6, 7). These materials have several layers of corner-sharing WO6 octahedra separated by o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea6a926f1d519568fd68be302e69db0a
https://doi.org/10.1021/cm011675j
https://doi.org/10.1021/cm011675j
Publikováno v:
Chemistry of Materials. 13:2940-2944
We report the vibrational properties of quasi-two-dimensional charge density wave (CDW) materials (PO2)4(WO3)2m (m = 4, 6). The CDW transitions occur at 80 and 54 K for m = 4 and 120 and 60 K for m...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22f13cbe55f6d8085870007c01b8e343
https://doi.org/10.1021/cm010214v
https://doi.org/10.1021/cm010214v
Autor:
C. Schlenker, J. Marcus, Manuel Almeida, T. Ohm, C. Hess, Carley Paulsen, Gregoire Bonfait, D. Dumas, Martha Greenblatt, Z. S. Teweldemedhin
Publikováno v:
Solid State Communications. 104:663-668
The monophosphate tungsten bronzes (PO 2 ) 4 (WO 3 ) 2 m are quasi two-dimensional conductors which show electronic instabilities of the Peierls type. The m = 7 member of the series P 4 W 14 O 50 , undergoes two successive Peierls transitions at T P
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33e8d4624a1f7b287b25b787b617648c
https://doi.org/10.1016/s0038-1098(97)10011-4
https://doi.org/10.1016/s0038-1098(97)10011-4
Publikováno v:
Physical Review B. 54:4581-4588
Magnetoresistance, Hall effect, and thermopower have been measured between 4.2 and 300 K on the monophosphate tungsten bronzes (${\mathrm{PO}}_{2}$${)}_{4}$(${\mathrm{WO}}_{3}$${)}_{2\mathit{m}}$, with m=4 and 6. The Peierls transitions associated wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08fc9146002d04e429d70ad7300cedd0
https://doi.org/10.1103/physrevb.54.4581
https://doi.org/10.1103/physrevb.54.4581
Autor:
Jean Dumas, Z. S. Teweldemedhin, J. Marcus, A. Rötger, C. Schlenker, J. Lehmann, Martha Greenblatt
Publikováno v:
Europhysics Letters (EPL). 25:23-29
Magnetotransport has been studied on the quasi-two-dimensional monophosphate tungsten bronzes (PO2)4(WO3)2m for m = 4, 6 and 7. These series provide a model system where the low-dimensional character and the electron density can be changed with m. In
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::993c5ff48a1521375b174794a6f2e42b
https://doi.org/10.1209/0295-5075/25/1/005
https://doi.org/10.1209/0295-5075/25/1/005
Publikováno v:
Journal of Solid State Chemistry. 107:554-562
The linear chain antiferromagnetism previously reported for Ba 2 MnS 3 and Ba 2 MnSe 3 is now demonstrated for Ba 2 MnTe 3 . The mixed-chalcogenide solid solutions Ba 2 Mn X x X ′ 3- x ( X , X ′ = S, Se, Te; x = 0, 1, 2) have been prepared and th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::152a22141cf1109ff1b8932a67f1c769
https://doi.org/10.1006/jssc.1993.1381
https://doi.org/10.1006/jssc.1993.1381
Publikováno v:
Materials Research Bulletin. 28:427-434
Tungsten pyrophosphate, WP2O7, was prepared by reacting mixtures of (NH4)2HPO4, WO3 and W at 900 °C in an evacuated quartz tube. Powder X-ray diffraction study shows the compound to be isostructural with cubic zirconium pyrophosphate, ZrP2O7, with a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9865e79f9c1e572607c9be5514794838
https://doi.org/10.1016/0025-5408(93)90124-v
https://doi.org/10.1016/0025-5408(93)90124-v
Publikováno v:
Synthetic Metals. 56:2670-2675
Electrical resistivity has been measured between 4.2 K and 300 K in fields up to 6 Tesla on the monophosphate tungsten bronzes P 4 W 8 O 32 , P 4 W 12 O 44 and P 4 W 14 O 50 . These compounds are anisotropic quasi-two-dimensional metals showing sever
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de87395b2a88cb61d064f58e9e4bd07b
https://doi.org/10.1016/0379-6779(93)90016-p
https://doi.org/10.1016/0379-6779(93)90016-p
Publikováno v:
ChemInform. 32
We report the vibrational properties of quasi-two-dimensional charge density wave (CDW) materials (PO2)4(WO3)2m (m = 4, 6). The CDW transitions occur at 80 and 54 K for m = 4 and 120 and 60 K for m...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::426b4afc2dcb4e9ac3a57482d5cb78df
https://doi.org/10.1002/chin.200149007
https://doi.org/10.1002/chin.200149007
Autor:
Janice L. Musfeldt, Hyun-Joo Koo, Martha Greenblatt, Z. S. Teweldemedhin, Myung-Hwan Whangbo, Zhengtao Zhu
Publikováno v:
ChemInform. 33
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7eba72b42d2bc419c7eaae2119ee78e
https://doi.org/10.1002/chin.200240013
https://doi.org/10.1002/chin.200240013