Unconventional transverse transport above and below the magnetic transition temperature in Weyl semimetal EuCd${}_2$As${}_2$

Abstract

As exemplified by the growing interest in the quantum anomalous Hall effect, the research on topology as an organizing principle of quantum matter is greatly enriched from the interplay with magnetism. In this vein, we present a combined electrical and thermoelectrical transport study on the magnetic Weyl semimetal EuCd${}_2$As${}_2$. Unconventional contribution to the anomalous Hall and anomalous Nernst effects were observed both above and below the magnetic transition temperature of EuCd${}_2$As${}_2$, indicating the existence of significant Berry curvature. EuCd${}_2$As${}_2$ represents a rare case in which this unconventional transverse transport emerges both above and below the magnetic transition temperature in the same material. The transport properties evolve with temperature and field in the antiferromagnetic phase in a different manner than in the paramagnetic phase, suggesting different mechanisms to their origin. Our results indicate EuCd${}_2$As${}_2$ is a fertile playground for investigating the interplay between magnetism and topology, and potentially a plethora of topologically nontrivial phases rooted in this interplay.

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• Spin order and fluctuations in the EuAl${}_4$ and EuGa${}_4$ topological antiferromagnets: A $\mu$SR study
• EuCd${}_2$As${}_2$: a magnetic semiconductor
• Pressure-induced ferromagnetism in the topological semimetal EuCd${}_2$As${}_2$
• Consecutive topological phase transitions and colossal magnetoresistance in a magnetic topological semimetal
• Spin-carrier coupling induced ferromagnetism and giant resistivity peak in EuCd${}_2$P${}_2$
• Topological Hall Effect Driven by Short-Range Magnetic Orders in EuZn${}_2$As${}_2$
• The discovery of three-dimensional Van Hove singularity
• Giant magnetoresistance and topological Hall effect in the EuGa4 antiferromagnet
• Optical properties and carrier localization in the layered phosphide EuCd${}_2$P${}_2$
• Large unconventional anomalous Hall effect arising from spin chirality within domain walls of an antiferromagnet EuZn${}_2$Sb${}_2$
• Skyrmion Crystals in the Triangular Kondo Lattice Model
• Giant and Reversible Electronic Structure Evolution in a Magnetic Topological Material EuCd2As2
• Carrier-induced transition from antiferromagnetic insulator to ferromagnetic metal in the layered phosphide EuZn${}_2$P${}_2$
• Absence of Weyl nodes in EuCd${}_2$As${}_2$ revealed by the carrier density dependence of the anomalous Hall effect
• Field-tunable Weyl points and large anomalous Hall effects in degenerate magnetic semiconductor EuMg${}_2$Bi${}_2$
• Long-Time Magnetic Relaxation in Antiferromagnetic Topological Material EuCd${}_2$As${}_2$
• Intrinsic insulating transport characteristics in low-carrier density EuCd2As2 films
• Anisotropic magnetotransport properties coupled with spiral spin modulation in a triangular-lattice magnet EuZnGe
• Unusual magnetic and transport properties in the Zintl phase Eu${}_{11}$Zn${}_6$As${}_{12}$
• Simultaneous achievement of large anomalous Nernst effect and reduced thermal conductivity in sintered polycrystalline topological Heusler ferromagnets
• Revealing the EuCd_{2}As_{2} Semiconducting Band Gap via n-type La-Doping
• Experimental progress in Eu(Al,Ga)${}_4$ topological antiferromagnets
• Giant Chern number of a Weyl nodal surface without upper limit
• Absence of metallicity and bias-dependent resistivity in low-carrier-density EuCd2As2
• Large Anomalous and Topological Hall Effect and Nernst Effect in a Dirac Kagome Magnet Fe3Ge
• Recent advances in understanding and manipulating magnetic and electronic properties of Eu$M_2{X}_2$ ($M$ = Zn, Cd; $X$ = P, As)
• Observation of paramagnetic spin-degeneracy lifting in EuZn2Sb2
• Tuning of anomalous magnetotransport properties in half-Heusler topological semimetal GdPtBi
• Doping-tunable Fermi surface with persistent topological Hall effect in axion candidate EuIn${}_2$As${}_2$
• Interplay of magnetic ordering and charge transport in a distorted ScAl${}_3$C${}_3$-type GdZn${}_3$As${}_3$
• Spin order and dynamics in the topological rare-earth germanide semimetals
• Two-Dimensional Phase-Fluctuating Superconductivity in Bulk-Crystalline NdO${}_{0.5}$F${}_{0.5}$BiS${}_2$
• Origin of the large topological Hall effect in the EuCd${}_2$Sb${}_2$ antiferromagnet
• A new ferromagnetic semiconductor system of Eu${}_{1-x}$Sr${}_x$AgP $(x=0.0-0.6)$ compounds: Crystallographic, magnetic, and magneto-resistive properties
• Temperature Dependent Evolution of the Electronic Structure in EuZn2As2 across the Neel Transition
• Investigating the origin of topological-Hall-like resistivity in Zn-doped Mn2Sb ferrimagnet
• Design, synthesis, and physical properties of the intergrowth compound Eu${}_2$CuZn${}_2$As${}_3$