This title appears in the Scientific Report : 2020 

Magnetic and Anomalous Transport Properties of Hexagonal -Mn3+δGe
RAI, VENUS
Nandi, Shibabrata / JANA, SUBHADIP / PERßON, JÖRG / BRÜCKEL, THOMAS
Streumethoden; JCNS-2
JARA-FIT; JARA-FIT
Streumethoden; PGI-4
2020
DPG-Frühjahrstagung der Sektion Kondensierte Materie (SKM), Technischen Universität Dresden, Campus Südvorstadt (Germany), 2020-03-15 - 2020-03-20
Poster
Jülich Centre for Neutron Research (JCNS)
Materials and Processes for Energy and Transport Technologies
Quantum Condensed Matter: Magnetism, Superconductivity
Controlling Collective States
Controlling Collective States
Topological quantum materials have attracted enormous attention since their discovery due to the observed anomalous transport properties, which originate from the non-zero Berry curvature. Mn3+δGe has gained special attention because of its large anomalous transport effects that persist starting from Néel temperature (365 K) down to 2 K. Hexagonal - Mn3+δGe stabilizes in the range of δ = 0.25 to 0.55. We have observed larger anomalous Hall effect with very small hysteresis (<200 Oe) for high Mn concentration in Mn3+δGe. To establish the claim for the existence of Weyl points in Mn3+δGe, transverse and longitudinal magneto-resistance (MR) was also performed with field and current applied along several combinations of x, y, z crystallographic axes. Negative MR is observed in some cases even when magnetic field (B) is perpendicular to the current (I) direction. However, in case of I∥B∥x, negative MR is observed with different slopes below and above 2 T. Angle dependent measurement (between I and B) shows that the negative MR with higher slope (observed below 2 T) is possibly originating due to the chiral anomaly.