scholarly journals Suppression of metal-insulator transition at high pressure and pressure-induced magnetic ordering in pyrochlore oxide Nd2Ir2O7

2011 ◽  
Vol 83 (4) ◽  
Author(s):  
Masafumi Sakata ◽  
Tomoko Kagayama ◽  
Katsuya Shimizu ◽  
Kazuyuki Matsuhira ◽  
Seishi Takagi ◽  
...  
Keyword(s):  
High Pressure ◽  
Magnetic Ordering ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Pyrochlore Oxide

Suppression of Metal–Insulator Transition in PrRu4P12under High Pressure Studied by Infrared Spectroscopy

2011 ◽  
Vol 80 (Suppl.A) ◽  
pp. SA092 ◽  
Author(s):  
Hidekazu Okamura ◽  
Ikuo Matsutori ◽  
Akira Takigawa ◽  
Ko Shoji ◽  
Kazuaki Miyata ◽  
...  
Keyword(s):  
High Pressure ◽  
Infrared Spectroscopy ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator

Metal–insulator transition under high pressure in

2005 ◽  
Vol 359-361 ◽  
pp. 886-888 ◽  
Author(s):  
Hiroyuki Hidaka ◽  
Ikuma Ando ◽  
Hisashi Kotegawa ◽  
Tatsuo C. Kobayashi ◽  
Hisatomo Harima ◽  
...  
Keyword(s):  
High Pressure ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator

Change of universality class of metal–insulator transition due to magnetic ordering

1999 ◽  
Vol 85 (8) ◽  
pp. 5332-5334 ◽  
Author(s):  
N. A. de Oliveira ◽  
M. V. Tovar Costa ◽  
A. Troper ◽  
Gloria M. Japiassú ◽  
M. A. Continentino
Keyword(s):  
Magnetic Ordering ◽  
Universality Class ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator

Spin-state-driven metal-insulator transition in(La,Sr)CoO3under high-pressure

2007 ◽  
Vol 75 (18) ◽  
Author(s):  
R. Lengsdorf ◽  
J.-P. Rueff ◽  
G. Vankó ◽  
T. Lorenz ◽  
L. H. Tjeng ◽  
...  
Keyword(s):  
High Pressure ◽  
Spin State ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator

HIGH PRESSURE STUDY OF NOVEL ELECTRONIC PROPERTIES IN Sr2Fe(W1-xMox)O6 NEAR METAL-INSULATOR TRANSITION

2007 ◽  
Vol 21 (18n19) ◽  
pp. 3279-3284
Author(s):  
G. OOMI ◽  
S. KAJI ◽  
Y. TOMIOKA ◽  
Y. TOKURA
Keyword(s):  
High Pressure ◽  
Double Perovskite ◽  
Insulator Transition ◽  
Metallic State ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Electrical Resistivities ◽  
Insulating Properties ◽  
High Pressure Study ◽  
Variable Range Hopping Conduction

Electrical resistivities of double perovskite oxides Sr 2 Fe ( W 1-x Mo x) O 6 have been measured at high pressure and high magnetic field to elucidate the transport properties of these materials. It is found that the main mechanism of the transport in the semiconducting phase is variable range hopping conduction and the insulating properties are suppressed by high pressure to show a crossover to metallic state. The magnetoresistances of these oxides are revealed to decrease at high pressure above 1 GPa. Extremely large Grüneisen parameters are found near x = 0.2, where the metal-insulator transition occurs. The origin for these properties will be briefly discussed in connection with the phase diagram.

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