期刊
PHYSICAL REVIEW B
卷 78, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.78.085120
关键词
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资金
- National Science Foundation of China
- Chinese Academy of Sciences
- Ministry of Science and Technology of China
- U.S. Department of Energy by Brookhaven Science Associates [DE-Ac02-98CH10886]
- National Science Foundation of the USA
The electronic structure of Cr1/3NbSe2 is studied via optical spectroscopy. We observe two low-energy interband transitions in the paramagnetic phase, which split into four peaks as the compound enters the ferromagnetic state. The band structure calculation indicates the four peaks are interband transitions to the spin up Cr e(g) states. We show that the peak splitting below the Curie temperature is not due to the exchange splitting of spin-up and spin-down bands, but directly reflects a band broadening effect in Cr-derived states upon the spontaneous ferromagnetic ordering.
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