Coexistence of logarithmic and SdH quantum oscillations in ferromagnetic Cr-doped tellurium single crystals

Shu-Juan Zhang; Lei Chen; Shuang-Shuang Li; Ying Zhang; Jian-Min Yan; Fang Tang; Yong Fang; Lin-Feng Fei; Weiyao Zhao; Julie Karel; Yang Chai; Ren-Kui Zheng

doi:10.1088/1361-648X/acc5ca

Coexistence of logarithmic and SdH quantum oscillations in ferromagnetic Cr-doped tellurium single crystals

J Phys Condens Matter. 2023 Mar 31;35(24). doi: 10.1088/1361-648X/acc5ca.

Authors

Shu-Juan Zhang¹, Lei Chen², Shuang-Shuang Li³, Ying Zhang³, Jian-Min Yan⁴, Fang Tang⁵, Yong Fang⁵, Lin-Feng Fei³, Weiyao Zhao⁶, Julie Karel⁶, Yang Chai⁴, Ren-Kui Zheng²

Affiliations

¹ School of Materials and Mechanic & Electrical Engineering, Jiangxi Science and Technology Normal University, Nanchang 330038, People's Republic of China.
² School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, People's Republic of China.
³ School of Materials Science and Engineering and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, People's Republic of China.
⁴ Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong 999077, People's Republic of China.
⁵ Jiangsu Laboratory of Advanced Functional Materials, Department of Physics, Changshu Institute of Technology, Changshu 215500, People's Republic of China.
⁶ Department of Materials Science & Engineering, & ARC Centre of Excellence in Future Low-Energy Electronics Technologies, Monash University, Clayton, VIC 3800, Australia.

PMID: 36940480
DOI: 10.1088/1361-648X/acc5ca

Abstract

We report the synthesis of transition-metal-doped ferromagnetic elemental single-crystal semiconductors with quantum oscillations using the physical vapor transport method. The 7.7 atom% Cr-doped Te crystals (Cr:Te) show ferromagnetism, butterfly-like negative magnetoresistance in the low temperature (<3.8 K) and low field (<0.15 T) region, and high Hall mobility, e.g. 1320 cm²V^-1s^-1at 30 K and 350 cm²V^-1s^-1at 300 K, implying that Cr:Te crystals are ferromagnetic elemental semiconductors. WhenB// [001] // I, the maximum negative MR is ∼-27% atT= 20 K andB= 8 T. In the low temperature semiconducting region, Cr:Te crystals show strong discrete scale invariance dominated logarithmic quantum oscillations when the direction of the magnetic fieldBis parallel to the [100] crystallographic direction (B// [100]) and show Landau quantization dominated Shubnikov-de Haas oscillations forB// [210] direction, which suggests the broken rotation symmetry of the Fermi pockets in the Cr:Te crystals. The findings of coexistence of multiple quantum oscillations and ferromagnetism in such an elemental quantum material may inspire more study of narrow bandgap semiconductors with ferromagnetism and quantum phenomena.

Keywords: Cr-doped Tellurium single crystals; SdH; ferromagnetic; logarithmic; quantum oscillation.