Manipulating of magnetism in the topological semimetal EuCd2As2

Abstract

Magnetic Weyl semimetals are expected to have extraordinary physical properties such as a chiral anomaly and large anomalous Hall effects that may be useful for future, potential, spintronics applications. However, in most known host materials, multiple pairs of Weyl points prevent a clear manifestation of the intrinsic topological effects. Our recent density functional theory (DFT) calculations study suggest that EuCd${}_2$As${}_2$ can host Dirac fermions in an antiferromagnetically (AFM) ordered state or a single pair of Weyl fermions in a ferromagnetically (FM) ordered state. Unfortunately, previously synthesized crystals ordered antiferromagnetically with $T_{\text{N}}$\,$\simeq$\,9.5\,K. Here, we report the successful synthesis of single crystals of EuCd${}_2$As${}_2$ that order ferromagnetically (FM) or antiferromagnetically (AFM) depending on the level of band filling, thus allowing for the use of magnetism to tune the topological properties within the same host. We explored their physical properties via magnetization, electrical transport, heat capacity, and angle resolved photoemission spectroscopy (ARPES) measurements and conclude that EuCd${}_2$As${}_2$ is an excellent, tunable, system for exploring the interplay of magnetic ordering and topology.

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Cited by in corpus (45)

• Realization of ideal Weyl semimetal band in ultracold quantum gas with 3D Spin-Orbit coupling
• Site Mixing for Engineering Magnetic Topological Insulators
• Unconventional transverse transport above and below the magnetic transition temperature in Weyl semimetal EuCd${}_2$As${}_2$
• Colossal Magnetoresistance without Mixed Valence in a Layered Phosphide Crystal
• Magnetic, thermal, and electronic-transport properties of EuMg2Bi2 single crystals
• 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
• Unusual Magnetic Properties in Layered Magnetic Topological Insulator EuSn2As2
• Single pair of Weyl nodes in the spin-canted structure of EuCd${}_2$As${}_2$
• Resonant X-ray scattering study of diffuse magnetic scattering from the topological semimetals EuCd${}_2$As${}_2$ and EuCd${}_2$Sb${}_2$
• A-type antiferromagnetic order and magnetic phase diagram of the trigonal Eu spin-7/2 triangular-lattice compound EuSn2As2
• 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
• A-type antiferromagnetic order in semiconducting EuMg${}_2$Sb${}_2$ single crystals
• Zero-field magnetic ground state of EuMg${}_2$Bi${}_2$
• Evidence of Ba substitution induced spin-canting in the magnetic Weyl semimetal EuCd${}_2$As${}_2$
• Optical properties and carrier localization in the layered phosphide EuCd${}_2$P${}_2$
• Electronic band reconstruction across the insulator-metal transition in colossal magnetoresistive EuCd2P2
• Anisotropic magnetism and electronic structure of trigonal EuAl${}_2$Ge${}_2$ single crystals
• 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${}_2$
• Expansive Open Fermi Arcs and Connectivity Changes Induced by Infrared Phonons in ZrTe5
• Visualizing band selective enhancement of quasiparticle lifetime in a metallic ferromagnet
• Manipulating magnetism and transport properties of EuCd${}_2$P${}_2$ with a low carrier concentration
• Absence of Weyl nodes in EuCd${}_2$As${}_2$ revealed by the carrier density dependence of the anomalous Hall effect
• Long-Time Magnetic Relaxation in Antiferromagnetic Topological Material EuCd${}_2$As${}_2$
• Pressure-induced ideal Weyl semimetal state in the layered antiferromagnet EuCd2As2
• Intrinsic insulating transport characteristics in low-carrier density EuCd2As2 films
• Pressure Effect on Band Inversion in AECd2As2
• Influence of magnetism, strain and pressure on the band topology of EuCd${}_2$As${}_2$
• Low-field magnetic anomalies in single crystals of the A-type square-lattice antiferromagnet EuGa${}_4$
• Unusual magnetic and transport properties in the Zintl phase Eu${}_{11}$Zn${}_6$As${}_{12}$
• Revealing the EuCd_{2}As_{2} Semiconducting Band Gap via n-type La-Doping
• Absence of metallicity and bias-dependent resistivity in low-carrier-density EuCd2As2
• Recent advances in understanding and manipulating magnetic and electronic properties of Eu$M_2{X}_2$ ($M$ = Zn, Cd; $X$ = P, As)
• Quantum decoherence by magnetic fluctuations in a magnetic topological insulator
• Topological Descendants of Multicritical EuTl2
• Observation of paramagnetic spin-degeneracy lifting in EuZn2Sb2
• A High-Flux and High-Efficiency Setup for Magneto-Infrared Spectroscopy
• Band structure and charge ordering of Dirac semimetal EuAl${}_4$ at low temperatures
• Electronic signatures of successive itinerant, magnetic transitions in hexagonal La2Ni7
• Interplay of short-range bond order and A-type antiferromagnetic order in metallic triangular lattice GdZn${}_3$P${}_3$
• Pressure-Induced Structural and Magnetic Evolution in Layered Antiferromagnet YbMn${}_2$Sb${}_2$