Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-04-18
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 3 figures, accepted for publication in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.71.220401
Infrared reflectivity measurements of CeSb under multi-extreme conditions (low temperatures, high pressures and high magnetic fields) were performed. A pseudo gap structure, which originates from the magnetic band folding effect, responsible for the large enhancement in the electrical resistivity in the single-layered antiferromagnetic structure (AF-1 phase) was found at a pressure of 4 GPa and at temperatures of 35 - 50 K. The optical spectrum of the pseudo gap changes to that of a metallic structure with increasing magnetic field strength and increasing temperature. This change is the result of the magnetic phase transition from the AF-1 phase to other phases as a function of the magnetic field strength and temperature. This result is the first optical observation of the formation and collapse of a pseudo gap under multi-extreme conditions.
Im Hee-Jung
Kimura Sachie
Kitazawa Hideaki
Kwon Yong-Seung
Mori Yasushi
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