The band gap and electrical resistivity of FeS 2 -pyrite at high pressures

Autor:	Elise Knittle, Phillip Cervantes, Z Slanic, F. Bridges, Quentin Williams
Rok vydání:	2002
Předmět:	Absorption spectroscopy Logarithm Band gap Chemistry Analytical chemistry General Chemistry engineering.material Condensed Matter Physics Pressure range Electrical resistivity and conductivity engineering General Materials Science Pyrite Linear trend
Zdroj:	Journal of Physics and Chemistry of Solids. 63:1927-1933
ISSN:	0022-3697
DOI:	10.1016/s0022-3697(02)00179-8
Popis:	The indirect energy gap and electrical resistivity of FeS 2 -pyrite have been measured at high pressures and 300 K using optical absorption spectroscopy and electrical conductivity measurements. Absorption spectra extend to ∼28 GPa, while resistivity is determined to ∼34 GPa. The band gap of FeS 2 is indirect throughout this pressure range and decreases linearly with pressure at a rate of −1.13(9)×10 −2 eV/GPa. If this linear trend continues, FeS 2 is expected to metallize at a pressure of 80(±8) GPa. The logarithm of resistivity also linearly decreases with pressure to 14 GPa with a slope of −0.101(±0.001)/GPa. However, between 14 and 34 GPa, the logarithm of resistivity is nearly constant, with a slope of −0.011(±0.003)/GPa. The measured resistivity of pyrite may be generated predominantly by extrinsic effects.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::161cf108c8907166a395eed1232b887f https://doi.org/10.1016/s0022-3697(02)00179-8 Zobrazit plný text záznamu Full Text from ScienceDirect