Optical conductivity and vibrational spectra of the narrow-gap semiconductor FeGa3

doi:10.1103/PhysRevB.107.165151

IMR OpenIR

	Optical conductivity and vibrational spectra of the narrow-gap semiconductor FeGa3
	Martin, C.1; Martinez, V. A.2; Opacic, M.3; Djurdjic-Mijin, S.3; Mitric, P.3; Umicevic, A.4; Poudel, A.1; Sydoryk, I.1; Ren, Weijun 5,6; Martin, R. M.7; Tanner, D. B.2; Lazarevic, N.3; Petrovic, C.5; Tanaskovic, D.3
通讯作者	Martin, C.()
	2023-04-26
发表期刊	PHYSICAL REVIEW B
ISSN	2469-9950
卷号	107 期号:16 页码:7
摘要	Intermetallic narrow-gap semiconductors have been intensively explored due to their large thermoelectric power at low temperatures and a possible role of strong electronic correlations in their unusual thermodynamic and transport properties. Here we study the optical spectra and vibrational properties of FeGa3 single crystal. The optical conductivity indicates that FeGa3 has a direct band gap of X 0.7 eV, consistent with density functional theory (DFT) calculations. Most importantly, we find a substantial spectral weight also below 0.4 eV, which is the energy of the indirect (charge) gap found in resistivity measurements and ab initio calculations. We find that the spectral weight below the gap decreases with increasing temperature, which indicates that it originates from the impurity states and not from the electronic correlations. Interestingly, we did not find any signatures of the impurity states in vibrational spectra. The infrared and Raman vibrational lines are narrow and weakly temperature dependent. The vibrational frequencies are in excellent agreement with our DFT calculations, implying a modest role of electronic correlations. Narrow Mossbauer spectral lines also indicate high crystallinity of the sample.
资助者	Research Honors Program at Ramapo College of New Jersey ; Institute of Physics Belgrade, through Ministry of Science, Technological Development, and Innovation of the Republic of Serbia ; Vinca Institute of Nuclear Sciences ; Ministry of Science, Technological Development, and Innovation of the Republic of Serbia ; U.S. Department of Energy, Basic Energy Sciences, Division of Materials Science and Engineering ; National Natural Science Foundation of China
DOI	10.1103/PhysRevB.107.165151
收录类别	SCI
语种	英语
资助项目	Research Honors Program at Ramapo College of New Jersey ; Institute of Physics Belgrade, through Ministry of Science, Technological Development, and Innovation of the Republic of Serbia ; Vinca Institute of Nuclear Sciences ; Ministry of Science, Technological Development, and Innovation of the Republic of Serbia ; U.S. Department of Energy, Basic Energy Sciences, Division of Materials Science and Engineering[DE-SC0012704] ; National Natural Science Foundation of China[51671192] ; National Natural Science Foundation of China[51531008]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000982523200006
出版者	AMER PHYSICAL SOC
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/177690
专题	中国科学院金属研究所
通讯作者	Martin, C.
作者单位	1.Ramapo Coll, Sch Theoret & Appl Sci, Mahwah, NJ 07430 USA 2.Univ Florida, Dept Phys, Gainesville, FL 32611 USA 3.Univ Belgrade, Inst Phys Belgrade, Pregrev 118, Belgrade 11080, Serbia 4.Univ Belgrade, Natl Inst Republ Serbia, Vincca Inst Nucl Sci, POB 522, Belgrade 11001, Serbia 5.Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA 6.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 7.Montclair State Univ, Dept Phys & Astron, Montclair, NJ 07043 USA
推荐引用方式 GB/T 7714	Martin, C.,Martinez, V. A.,Opacic, M.,et al. Optical conductivity and vibrational spectra of the narrow-gap semiconductor FeGa3[J]. PHYSICAL REVIEW B,2023,107(16):7.
APA	Martin, C..,Martinez, V. A..,Opacic, M..,Djurdjic-Mijin, S..,Mitric, P..,...&Tanaskovic, D..(2023).Optical conductivity and vibrational spectra of the narrow-gap semiconductor FeGa3.PHYSICAL REVIEW B,107(16),7.
MLA	Martin, C.,et al."Optical conductivity and vibrational spectra of the narrow-gap semiconductor FeGa3".PHYSICAL REVIEW B 107.16(2023):7.