The magneto-transport, angle resolved photoemission spectroscopy (ARPES), and magnetization of Bi2-xMx(SeS)3 (with M = Fe, Mn) have been investigated. In Fe-doped Bi2(SeS)3, the presence of both electron-mediated Ruderman–Kittel–Kasuya–Yosida (RKKY) coupling and carrier-independent van Vleck magnetism has been demonstrated. Interestingly, by varying the Fe content and temperature, the interplay between the two mechanisms for magnetic ordering has been revealed. On the other hand, in the Mn-doped sample, hole-mediated RKKY coupling is observed. Thus, a particular mechanism can be used to induce magnetic ordering in the topological insulator. Furthermore, both ARPES and magnetic studies indicate that surface magnetic ordering may or may not break the time reversal symmetry (TRS), whereas bulk magnetic ordering breaks the TRS, suggesting the potentiality of these materials for spintronic application.
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29 March 2021
Research Article|
April 01 2021
Evidence of surface and bulk magnetic ordering in Fe and Mn doped Bi2(SeS)3 topological insulator
Mahima Singh;
Mahima Singh
1
Department of Physics, Indian Institute of Technology (Banaras Hindu University)
, 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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Mohd Alam;
Mohd Alam
1
Department of Physics, Indian Institute of Technology (Banaras Hindu University)
, Varanasi 221005, India
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Vinod K. Gangwar;
Vinod K. Gangwar
1
Department of Physics, Indian Institute of Technology (Banaras Hindu University)
, Varanasi 221005, India
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Labanya Ghosh;
Labanya Ghosh
1
Department of Physics, Indian Institute of Technology (Banaras Hindu University)
, Varanasi 221005, India
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Debarati Pal;
Debarati Pal
1
Department of Physics, Indian Institute of Technology (Banaras Hindu University)
, Varanasi 221005, India
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Rahul Singh;
Rahul Singh
a)
1
Department of Physics, Indian Institute of Technology (Banaras Hindu University)
, Varanasi 221005, India
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P. Shahi
;
P. Shahi
3
Department of Physics, D.D.U. Gorakhpur University
, Gorakhpur 27300, India
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P. Chaudhary
;
P. Chaudhary
4
School of material Science and Technology, Indian Institute of Technology (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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Sandip Chatterjee
Sandip Chatterjee
b)
1
Department of Physics, Indian Institute of Technology (Banaras Hindu University)
, Varanasi 221005, India
b)Author to whom correspondence should be addressed: schatterji.app@iitbhu.ac.in
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a)
Present address: Solid State Physics Division, Bhabha Atomic Research Center, Trombay, Mumbai-400085, India.
b)Author to whom correspondence should be addressed: schatterji.app@iitbhu.ac.in
Appl. Phys. Lett. 118, 132409 (2021)
Article history
Received:
October 28 2020
Accepted:
March 12 2021
Citation
Mahima Singh, Shiv Kumar, Mohd Alam, Vinod K. Gangwar, Labanya Ghosh, Debarati Pal, Rahul Singh, P. Shahi, P. Chaudhary, Kenya Shimada, Sandip Chatterjee; Evidence of surface and bulk magnetic ordering in Fe and Mn doped Bi2(SeS)3 topological insulator. Appl. Phys. Lett. 29 March 2021; 118 (13): 132409. https://doi.org/10.1063/5.0035433
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