Observation of a broad peak in the temperature (T) dependent resistivity (ρ) in Cu substituted Bi2Te3 has been reported earlier, though its origin remains obscured to date. Our investigation reveals that an electronic phase transition accompanied by Fermi level tuning primarily contributes toward the observed . The analysis reveals that tuning of the Fermi level affects bulk transport phenomena to produce the unique . We have proposed a model to show how the bulk bandgap can affect . We have shown that bulk carrier contribution has a greater role in producing such , and a detailed discussion supported by temperature dependent ARPES study, Raman study, and XPS study as well as structural study conducted by x-ray diffraction has been presented.
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10 January 2022
Research Article|
January 12 2022
Unraveling the obscure electronic transition and tuning of Fermi level in Cu substituted Bi2Te3 compound
Sambhab Dan
;
Sambhab Dan
1
Department of Physics, Indian Institute of Technology (BHU)
, Varanasi 221005, India
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Shiv Kumar
;
Shiv Kumar
2
Hiroshima Synchrotron Radiation Center, Hiroshima University
, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
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Shovan Dan
;
Shovan Dan
3
Department of Physics, The University of Burdwan
, Burdwan 713104, India
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Debarati Pal;
Debarati Pal
1
Department of Physics, Indian Institute of Technology (BHU)
, Varanasi 221005, India
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S. Patil;
S. Patil
a)
1
Department of Physics, Indian Institute of Technology (BHU)
, Varanasi 221005, India
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Abhineet Verma;
Abhineet Verma
4
Department of Chemistry, Institute of Science, Banaras Hindu University
, Varanasi 221005, India
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Satyen Saha
;
Satyen Saha
4
Department of Chemistry, Institute of Science, Banaras Hindu University
, Varanasi 221005, India
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Kenya Shimada
;
Kenya Shimada
2
Hiroshima Synchrotron Radiation Center, Hiroshima University
, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
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S. Chatterjee
S. Chatterjee
a)
1
Department of Physics, Indian Institute of Technology (BHU)
, Varanasi 221005, India
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Sambhab Dan
1
Shiv Kumar
2
Shovan Dan
3
Debarati Pal
1
S. Patil
1,a)
Abhineet Verma
4
Satyen Saha
4
Kenya Shimada
2
S. Chatterjee
1,a)
1
Department of Physics, Indian Institute of Technology (BHU)
, Varanasi 221005, India
2
Hiroshima Synchrotron Radiation Center, Hiroshima University
, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
3
Department of Physics, The University of Burdwan
, Burdwan 713104, India
4
Department of Chemistry, Institute of Science, Banaras Hindu University
, Varanasi 221005, India
Appl. Phys. Lett. 120, 022105 (2022)
Article history
Received:
November 03 2021
Accepted:
December 29 2021
Citation
Sambhab Dan, Shiv Kumar, Shovan Dan, Debarati Pal, S. Patil, Abhineet Verma, Satyen Saha, Kenya Shimada, S. Chatterjee; Unraveling the obscure electronic transition and tuning of Fermi level in Cu substituted Bi2Te3 compound. Appl. Phys. Lett. 10 January 2022; 120 (2): 022105. https://doi.org/10.1063/5.0077476
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