2017/07/05 by J. Yan, X. Luo, F. C. Chen +8 · 22 citations
Materials Science · Physics and Astronomy · #2D Materials and Applications #Antiferromagnetism #Electrical resistivity and conductivity #Hall effect #Iron-based superconductors research #Magnetization #Magnetoresistance #Seebeck coefficient #Semiconductor #Thermal Hall effect #Topological Materials and Phenomena #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1063/1.4985224
published in Applied Physics Letters 111(2) (American Institute of Physics) · Accepted by Appl.Phys.Lett
arxiv created 2017/07/05 · openalex publication_date 2017/07/10 · openalex created_date 2017/07/14 · arxiv updated 2017/08/02 · openalex updated_date 2026/08/05
Cr0.68Se single crystals with two-dimensional (2D) character have been grown, and the detailed magnetization M(T), electrical transport properties (including longitudinal resistivity ρxx and Hall resistivity ρxy), and thermal transport properties [including heat capacity Cp(T) and thermoelectric power S(T)] have been measured. There are some interesting phenomena: (i) Cr0.68Se presents a non-collinear antiferromagnetic (AFM) semiconducting behavior at the Néel temperature of TN = 42 K and with the activated energy of Eg = 3.9 meV; (ii) it exhibits the anomalous Hall effect (AHE) below TN and large negative magnetoresistance about 83.7% (2 K, 8.5 T). The AHE coefficient RS is 0.385 cm−3/C at T = 2 K, and the AHE conductivity σH is about 1 Ω−1 cm−1 at T = 40 K; (iii) the scaling behavior between the anomalous Hall resistivity ρxyA and the longitudinal resistivity ρxx is linear, and further analysis implies that the origin of the AHE in Cr0.68Se is dominated by the skew-scattering mechanism. Our results may be helpful for exploring the potential application of these kinds of 2D AFM semiconductors.