Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session T00: Poster Session III (1pm-4pm PST)
1:00 PM,
Thursday, March 9, 2023
Room: Exhibit Hall (Forum Ballroom)
Sponsoring
Unit:
APS
Abstract: T00.00005 : Magnetic order and surface state gap in Cr doped Sb2Te3*
Presenter:
Tamal K Dalui
(Indian Association for the Cultivation of Science)
Author:
Tamal K Dalui
(Indian Association for the Cultivation of Science)
rise to the diverse range of exotic consequences, though proper understanding of the magnetic order has rarely
been attempted by using any microscopic experiments. We report the occurrence of the magnetic order in Cr
Sb2Te3 using the muon spin relaxation studies. The asymmetry curve at low temperature (T) shows
an evidence of a damped oscillation, providing a clue about the internal magnetic field (Hint ), which follows
Hint (T ) = Hint (0)[1 − T/TC]β with ordering temperature TC ≈ 6.1 K and critical exponent β ≈ 0.22. The critical
exponent is close to the 2D XY-type interaction. The magnetization curves at low T exhibit a
ferromagnetic behavior at low field (H) and the de Haas–van Alphen (dHvA) effect at high H. The analysis
of the dHvA oscillation proposes the charge carrier that acts like a massive Dirac fermion. The Berry phase,
as obtained from the Landau-level fan diagram, suggests a surface state gap at the Dirac point. The complex
electronic structure is discussed by correlating the magnetic order attributed to the Cr doping in Sb2Te3.
*Department of Science and Technology,India
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