NMR study of the metal-insulator transition in the compensated sodium-tungsten bronze,NaxTayW1−yO3

1986 ◽  
Vol 34 (1) ◽  
pp. 25-35 ◽  
Author(s):  
M. A. Dubson ◽  
D. F. Holcomb
Keyword(s):  
Tungsten Bronze ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Nmr Study ◽  
Sodium Tungsten ◽  
Sodium Tungsten Bronze

Understanding metal–insulator transition in sodium tungsten bronze

Pramana ◽  
2015 ◽  
Vol 84 (6) ◽  
pp. 957-966
Author(s):  
SANHITA PAUL ◽  
SATYABRATA RAJ
Keyword(s):  
Tungsten Bronze ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Sodium Tungsten ◽  
Sodium Tungsten Bronze

scholarly journals METAL-INSULATOR TRANSITION OF NaxWO3 STUDIED BY ANGLE-RESOLVED PHOTOEMISSION SPECTROSCOPY

2009 ◽  
Vol 23 (24) ◽  
pp. 2819-2846 ◽  
Author(s):  
SATYABRATA RAJ ◽  
TAKAFUMI SATO ◽  
SEIGO SOUMA ◽  
TAKASHI TAKAHASHI ◽  
D. D. SARMA ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Fermi Level ◽  
Good Description ◽  
Tungsten Bronze ◽  
Insulator Transition ◽  
Photoemission Spectroscopy ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Sodium Tungsten

The electronic structure of sodium tungsten bronzes Na x WO 3 is investigated by high-resolution angle-resolved photoemission spectroscopy (ARPES). The ARPES spectra measured in both insulating and metallic phases of Na x WO 3 reveals the origin of metal-insulator transition (MIT) in sodium tungsten bronze system. It is found that in insulating Na x WO 3 the states near the Fermi level (EF) are localized due to the strong disorder caused by the random distribution of Na + ions in WO 3 lattice. Due to the presence of disorder and long-range Coulomb interaction of conduction electrons, a soft Coulomb gap arises, where the density of states vanishes exactly at EF. In the metallic regime the states near EF are populated and the Fermi level shifts upward rigidly with increasing electron doping (x). Volume of electron-like Fermi surface (FS) at the Γ(X) point of the Brillouin zone gradually increases with increasing Na concentration due to W 5d t2g band filling. A rigid shift of the Fermi energy is found to give a qualitatively good description of the Fermi surface evolution. As we move from bulk-sensitive to more surface sensitive photon energy, we found the emergence of Fermi surfaces at X(M) and M(R) points similar to the one at the Γ(X) point in the metallic regime, suggesting that the reconstruction of surface was due to rotation/deformation of WO 6 octahedra.

NMR study on the metal–insulator transition of CuIr2S4

2004 ◽  
Vol 408-410 ◽  
pp. 822-823 ◽  
Author(s):  
M. Sasaki ◽  
K. Kumagai ◽  
K. Kakuyanagi ◽  
S. Nagata
Keyword(s):  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Nmr Study

NMR Study of the Metal-Insulator Transition in β-Na0.33V2O5

2006 ◽  
Author(s):  
Tomoyuki Suzuki ◽  
Ichihiro Yamauchi ◽  
Masayuki Itoh ◽  
Touru Yamauchi ◽  
Yutaka Ueda
Keyword(s):  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Nmr Study

NMR Study of Si:As and Si:P near the metal-insulator transition

1986 ◽  
Vol 33 (4) ◽  
pp. 2520-2529 ◽  
Author(s):  
M. J. Hirsch ◽  
D. F. Holcomb
Keyword(s):  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Nmr Study

NMR study on the metal-insulator transition of (Cu1−xNix)Ir2S4

2000 ◽  
Vol 341-348 ◽  
pp. 741-742 ◽  
Author(s):  
K. Kumagai ◽  
K. Kakuyanagi ◽  
R. Endoh ◽  
S. Nagata
Keyword(s):  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Nmr Study

Metal–insulator transition in sodium tungsten bronzes, , studied by angle-resolved photoemission spectroscopy

2007 ◽  
Vol 310 (2) ◽  
pp. e231-e233 ◽  
Author(s):  
S. Raj ◽  
D. Hashimoto ◽  
H. Matsui ◽  
S. Souma ◽  
T. Sato ◽  
...  
Keyword(s):  
Insulator Transition ◽  
Photoemission Spectroscopy ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Sodium Tungsten

Tunnelling studies on sodium tungsten bronzes near the metal-insulator transition

1993 ◽  
Vol 5 (44) ◽  
pp. L551-L558 ◽  
Author(s):  
H Srikanth ◽  
A K Raychaudhuri
Keyword(s):  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Sodium Tungsten

NMR study on a metal-insulator transition in oxysulfides (La1−xCaxO)Cu1−xNixS

1997 ◽  
Vol 282-287 ◽  
pp. 1105-1106 ◽  
Author(s):  
Y. Furukawa ◽  
S. Ikeda ◽  
H. Watanabe ◽  
K. Kumagai ◽  
K. Mori ◽  
...  
Keyword(s):  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Nmr Study

A high-pressure NMR study of sodium tungsten bronze: NaxWO3

1980 ◽  
Vol 13 (5) ◽  
pp. 725-738 ◽  
Author(s):  
D P Tunstall ◽  
W Ramage
Keyword(s):  
High Pressure ◽  
Tungsten Bronze ◽  
Nmr Study ◽  
Sodium Tungsten ◽  
Sodium Tungsten Bronze
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