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Lattice dynamics, optical and thermal properties of quasi-two-dimensional anisotropic layered semimetal ZrTe2
Muhammad, Zahir1,2; Usman, Muhammad2; Ullah, Sami3; Zhang, Bo4; Lu, Qixiao2; Zhu, Ling2; Hu, Rui2
Corresponding AuthorZhu, Ling(zhuling@szu.edu.cn) ; Hu, Rui(rhu@szu.edu.cn)
2021-06-24
Source PublicationINORGANIC CHEMISTRY FRONTIERS
ISSN2052-1553
Pages8
AbstractIn this study, an investigation was conducted on the vibrational properties of 2D layered zirconium ditelluride by employing Raman spectroscopy. In addition, the surface electronic and optical properties of bulk ZrTe2 were studied by infrared spectroscopy. Two Raman-active modes were observed at 109.3 cm(-1) (E-g) and 145.2 cm(-1) (A(1g)) in ZrTe2, respectively, as compared with the DFT calculations. Next, the Raman modes were studied in depth from the bulk to bilayer over a range of temperatures. A(1g) and E-g soften with the increasing temperature from 80 to 300 K. Moreover, the softening of both vibrational modes was observed to show a strong association with the anharmonic interlayer phonon coupling or thermal expansion at different temperatures; hence, the phonon frequencies could be shifted. However, a blue shift was observed with the decrease in the number of layers, which are connected to the interlayer interaction, or the structural mismatch in layers compared with their bulk counterpart. Angle-resolved Raman spectroscopy revealed the anisotropic properties of ZrTe2. Similarly, the optical properties exhibited by ZrTe2 suggested the co-existence of two types of charge carriers along with bound excitons in the infrared regime. Besides, the Hall measurements indicates the dominant electron-type carriers and high mobility at low temperatures in ZrTe2. Furthermore, the calculated thermal conductivity of similar to 5.4 W m(-1) K-1 at ambient temperature showed ZrTe2 as a prominent candidate for thermoelectric devices. Accordingly, as revealed from the obtained results, ZrTe2 with different layers could be useful in spintronic and tunable thermoelectric devices.
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China ; Shenzhen Basic Research Project ; Shenzhen Science and Technology Innovation Foundation ; Guangdong Natural Science Foundation ; Shenzhen University fund
DOI10.1039/d1qi00553g
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2018YFC0910602] ; National Natural Science Foundation of China[61775145] ; National Natural Science Foundation of China[61525503] ; National Natural Science Foundation of China[61620106016] ; National Natural Science Foundation of China[61835009] ; National Natural Science Foundation of China[81727804] ; National Natural Science Foundation of China[61722508] ; Shenzhen Basic Research Project[JCYJ20190808123401666] ; Shenzhen Basic Research Project[JCYJ20170412110212234] ; Shenzhen Basic Research Project[JCYJ20170412105003520] ; Shenzhen Basic Research Project[2019A1515011762] ; Shenzhen Science and Technology Innovation Foundation[JCYJ20180305125302333] ; Shenzhen Science and Technology Innovation Foundation[JCYJ20170818093035338] ; Shenzhen Science and Technology Innovation Foundation[JCYJ20180305125430954] ; Guangdong Natural Science Foundation[2019A1515011762] ; Shenzhen University fund[860-000002110229]
WOS Research AreaChemistry
WOS SubjectChemistry, Inorganic & Nuclear
WOS IDWOS:000673656400001
PublisherROYAL SOC CHEMISTRY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/159782
Collection中国科学院金属研究所
Corresponding AuthorZhu, Ling; Hu, Rui
Affiliation1.Beihang Univ, Sch Microelect, Hefei Innovat Res Inst, Hefei 230013, Peoples R China
2.Shenzhen Univ, Coll Phys Optoelect Engn, Minist Educ Guangdong Prov, Key Lab Optoelect Devices & Syst, Shenzhen 518060, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
4.Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China
Recommended Citation
GB/T 7714
Muhammad, Zahir,Usman, Muhammad,Ullah, Sami,et al. Lattice dynamics, optical and thermal properties of quasi-two-dimensional anisotropic layered semimetal ZrTe2[J]. INORGANIC CHEMISTRY FRONTIERS,2021:8.
APA Muhammad, Zahir.,Usman, Muhammad.,Ullah, Sami.,Zhang, Bo.,Lu, Qixiao.,...&Hu, Rui.(2021).Lattice dynamics, optical and thermal properties of quasi-two-dimensional anisotropic layered semimetal ZrTe2.INORGANIC CHEMISTRY FRONTIERS,8.
MLA Muhammad, Zahir,et al."Lattice dynamics, optical and thermal properties of quasi-two-dimensional anisotropic layered semimetal ZrTe2".INORGANIC CHEMISTRY FRONTIERS (2021):8.
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