| 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, Weijun5,6; Martin, R. M.7; Tanner, D. B.2; Lazarevic, N.3; Petrovic, C.5; Tanaskovic, D.3 | |
| Corresponding Author | Martin, C.() |
| 2023-04-26 | |
| Source Publication | PHYSICAL REVIEW B
 |
| ISSN | 2469-9950 |
| Volume | 107Issue:16Pages:7 |
| Abstract | 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. |
| Funding Organization | 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 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Materials Science ; Physics |
| WOS Subject | Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter |
| WOS ID | WOS:000982523200006 |
| Publisher | AMER PHYSICAL SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/177690 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Martin, C. |
| Affiliation | 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 |
| Recommended Citation 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. |
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