Structural and Magnetotransport Studies of Iron‐Intercalated Bi₂Se₃ Single Crystals

Abstract

A detailed investigation on the structural and magnetotransport properties of iron‐intercalated Bi2Se3 single crystals is presented. The X‐ray diffraction and Raman studies confirm the intercalation of Fe in the van der Waals gaps between the layers. The electrical resistivity of the compounds decreases upon intercalation, and Hall resistivity shows the enhancement of the charge carriers upon intercalation. The magnetoresistance (MR) shows the non‐saturating linear behavior at higher magnetic field and low temperature. Intercalation of Fe increases the onset of the linear MR behavior, indicating the reduction in quantum effects. The Kohler scaling used on the MR data indicates single scattering process for all these compounds in the measured temperature range of 3–300 K.

Anisotropic upper critical field, Seebeck and Nernst coefficient of Nb0.20Bi2Se3 superconductor

“…The ρ xy (H) measured at T = 5-300 K and H = 0-8 T is presented in figure 3(c is one order larger compared to the parent Bi 2 Se 3 [36], but comparable to that reported in literature for doped Bi 2 Se 3 [32,45,46]. 4 for undoped Bi 2 Se 3 and Nb 0.20 Bi 2 Se 3 single crystal.…”

“…The percentage change in MR is defined as MR% = ρ(H)−ρ(H=0) ρ(H=0) × 100%. The Nb 0.2 Bi 2 Se 3 is found to exhibit H 2 dependence at low fields and nonsaturating linear behaviour at high fields, similar to the parent compound Bi 2 Se 3 with a maximum value of ∼35% at T = 4 K which is comparable to that of Bi 2 Se 3 [36]. As observed from the plots (shown as fit in black) that quadratic field dependence of MR increases with increase in temperature.…”