Optical conductivity and vibrational spectra of the narrow-gap semiconductor FeGa 3
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
- Authors:
-
- Ramapo College of New Jersey, Mahwah, NJ (United States)
- University of Florida, Gainesville, FL (United States)
- University of Belgrade (Serbia)
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Chinese Academy of Sciences (CAS), Beijing (China)
- Montclair State University, NJ (United States)
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Contributing Org.:
- National Natural Science Foundation of China, Beijing (China)
- OSTI Identifier:
- 1985786
- Alternate Identifier(s):
- OSTI ID: 1972743
- Report Number(s):
- BNL-224519-2023-JAAM
Journal ID: ISSN 2469-9950; TRN: US2402693
- Grant/Contract Number:
- SC0012704; 51671192; 51531008
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B
- Additional Journal Information:
- Journal Volume: 107; Journal Issue: 16; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Electronic structure; Optical conductivity; Intermetallic semiconductors; Mössbauer spectroscopy; Optical spectroscopy; Raman spectroscopy
Citation Formats
Martin, Catalin, Martinez, V. A., Opačić, Marko, Djurdjić-Mijin, Sanja, Mitrić, Petar, Umićević, Ana B., Poudel, Aashish, Sydoryk, Ihor, Ren, Weijun, Martin, Rodica M., Tanner, David B., Lazarević, Nenad, Petrovic, Cedomir, and Tanasković, Darko. Optical conductivity and vibrational spectra of the narrow-gap semiconductor FeGa3. United States: N. p., 2023.
Web. doi:10.1103/physrevb.107.165151.
Martin, Catalin, Martinez, V. A., Opačić, Marko, Djurdjić-Mijin, Sanja, Mitrić, Petar, Umićević, Ana B., Poudel, Aashish, Sydoryk, Ihor, Ren, Weijun, Martin, Rodica M., Tanner, David B., Lazarević, Nenad, Petrovic, Cedomir, & Tanasković, Darko. Optical conductivity and vibrational spectra of the narrow-gap semiconductor FeGa3. United States. https://doi.org/10.1103/physrevb.107.165151
Martin, Catalin, Martinez, V. A., Opačić, Marko, Djurdjić-Mijin, Sanja, Mitrić, Petar, Umićević, Ana B., Poudel, Aashish, Sydoryk, Ihor, Ren, Weijun, Martin, Rodica M., Tanner, David B., Lazarević, Nenad, Petrovic, Cedomir, and Tanasković, Darko. Wed .
"Optical conductivity and vibrational spectra of the narrow-gap semiconductor FeGa3". United States. https://doi.org/10.1103/physrevb.107.165151. https://www.osti.gov/servlets/purl/1985786.
@article{osti_1985786,
title = {Optical conductivity and vibrational spectra of the narrow-gap semiconductor FeGa3},
author = {Martin, Catalin and Martinez, V. A. and Opačić, Marko and Djurdjić-Mijin, Sanja and Mitrić, Petar and Umićević, Ana B. and Poudel, Aashish and Sydoryk, Ihor and Ren, Weijun and Martin, Rodica M. and Tanner, David B. and Lazarević, Nenad and Petrovic, Cedomir and Tanasković, Darko},
abstractNote = {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. The optical conductivity indicates that FeGa3 has a direct band gap of ≈ 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 Mössbauer spectral lines also indicate high crystallinity of the sample.},
doi = {10.1103/physrevb.107.165151},
journal = {Physical Review. B},
number = 16,
volume = 107,
place = {United States},
year = {Wed Apr 26 00:00:00 EDT 2023},
month = {Wed Apr 26 00:00:00 EDT 2023}
}
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