Extraordinary pressure dependence of the metal-to-insulator transition in the charge-transfer compounds NdNiO[sub 3] and PrNiO[sub 3]

Journal Article · Sat May 01 04:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.12357· OSTI ID:6632339

Canfield, P C; Thompson, J D ^[1]; Cheong, S; Rupp, L W ^[2]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. AT T Bell Laboratories, Murray Hill, New Jersey 07974 (United States)

The pressure dependence of the metal-to-insulator transition in NdNiO[sub 3] and PrNiO[sub 3] has been studied up to applied hydrostatic pressures of 16 kbar. In both cases the first-order metal-to-insulator phase transition is extremely sensitive to pressure, with 15.1 kbar suppressing the transition from 196 to 103 K in NdNiO[sub 3] and 14.1 kbar suppressing the transition from 130 to below 1.5 K in PrNiO[sub 3]. Analysis of the data within the framework of charge-transfer gap insulators leads to the prediction that the primary effect of pressure is to straighten the Ni-O-Ni bond angle, leading to a broadening of the lower, oxygenlike valence band.

• OSTI ID: 6632339
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:18; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CHALCOGENIDES
ELECTRON TRANSFER
HIGH PRESSURE
MEDIUM PRESSURE
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
NICKEL COMPOUNDS
NICKEL OXIDES
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
PRESSURE DEPENDENCE
RARE EARTH COMPOUNDS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TRANSITION ELEMENT COMPOUNDS
VERY HIGH PRESSURE