TY - JOUR
T1 - Breakdown of the mott-hubbard state in Fe2O3
T2 - A first-order insulator-metal transition with collapse of magnetism at 50 gpa
AU - Pasternak, M. P.
AU - Rozenberg, G. Kh
AU - Machavariani, G. Yu
AU - Naaman, O.
AU - Taylor, R. D.
AU - Jeanloz, R.
PY - 1999
Y1 - 1999
N2 - Electronic and structural properties of the high-pressure phase of Fe2O3 were determined by combining the methods of Mössbauer spectroscopy, x-ray diffraction, and electrical resistance, R(P, T), to 80 GPa. Because of a first-order phase transition taking place in the 50–75 GPa range and accompanied by a volume decrease of ˜10%, a breakdown of the electronic d-d correlation occurred, leading to a Mott transition, a metallic and a nonmagnetic single Fe3+ electronic state. The high-pressure structure is of the distorted Rh2O3 - II type. The accommodation of the denser phase within this six-coordinated structure is attributable to the metallic state.
AB - Electronic and structural properties of the high-pressure phase of Fe2O3 were determined by combining the methods of Mössbauer spectroscopy, x-ray diffraction, and electrical resistance, R(P, T), to 80 GPa. Because of a first-order phase transition taking place in the 50–75 GPa range and accompanied by a volume decrease of ˜10%, a breakdown of the electronic d-d correlation occurred, leading to a Mott transition, a metallic and a nonmagnetic single Fe3+ electronic state. The high-pressure structure is of the distorted Rh2O3 - II type. The accommodation of the denser phase within this six-coordinated structure is attributable to the metallic state.
UR - http://www.scopus.com/inward/record.url?scp=18344382549&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.82.4663
DO - 10.1103/PhysRevLett.82.4663
M3 - מאמר
AN - SCOPUS:18344382549
VL - 82
SP - 4663
EP - 4666
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 23
ER -