Topological Hall effect instigated in kagome MnSn due to Mn-deficit induced noncoplanar spin structure.

Magnetic topological semimetals are manifestations of the interplay between electronic and magnetic phases of matter, leading to peculiar characteristics such as the anomalous Hall effect (AHE) and the topological Hall effect (THE). MnSn is a time-reversal symmetry-broken magnetic Weyl semimetal showing topological characteristics within the Kagome lattice network. This study reveals a large THE in MnSn (6% Mn deficit MnSn) at room temperature in the-plane, despite being an antiferromagnet.

Unusual multiple magnetic transitions and anomalous Hall effect observed in antiferromagnetic Weyl semimetal, MnGe (Ge-rich).

We report on the magnetic and Hall effect measurements of the magnetic Weyl semimetal, MnGe (Ge-rich) single crystal. From the magnetic properties study, we identify unusual multiple magnetic transitions below the Ne'el temperature of 353 K, such as the spin-reorientation () and ferromagnetic-like transitions. Consistent with the magnetic properties, the Hall effect study shows unusual behavior around the spin-reorientation transition.

Weak electronic correlations observed in magnetic Weyl Semimetal MnGe.

Using angle-resolved photoemission spectroscopy (ARPES) and density functional theory (DFT) calculations, we systematically studied the electronic band structure of MnGe in the vicinity of the Fermi level. We observe several bands crossing the Fermi level, confirming the metallic nature of the studied system. We further observe several flat bands along various high symmetry directions, consistent with the DFT calculations.

Tuning of electrical, magnetic, and topological properties of magnetic Weyl semimetal Mn3+xGe by Fe doping.

We report on the tuning of electrical, magnetic, and topological properties of the magnetic Weyl semimetal (Mn3+xGe) by Fe doping at the Mn site, Mn(3+x)-δFeδGe (= 0, 0.30, and 0.62).

Observation of Exchange Bias in Antiferromagnetic CrSe Due to the Coexistence of Itinerant Weak Ferromagnetism at Low Temperatures.

We report on the structural, electrical transport, and magnetic properties of antiferromagnetic transition-metal monochalcogenide CrSe. Different from the existing off-stoichiometric compositions, CrSe is found to be synthesized into the same NiAs-type hexagonal crystal structure as that of CrSe. Resistivity data suggest CrSe to be a Fermi-liquid-type metal at low temperatures, while at intermediate temperatures, the resistivity depends sublinearly on the temperature.