Observation of an unexpected negative magnetoresistance in magnetic weyl semimetal Co3Sn2S2
نویسندگان
چکیده
Time-reversal symmetry breaking allows for a rich set of magneto-transport properties related to electronic topology. Focusing on the magnetic Weyl semimetal Co$_3$Sn$_2$S$_2$, we prepared micro-ribbons and investigated their transverse longitudinal transport from 100 K 180 in fields $\mu_0 H$ up 2T. We establish presence magnetoresistance (MR) 1 % with strong anisotropy depending projection $H$ easy-axis magnetization, which exceeds all other magnetoresistive effects. Based detailed phenomenological modeling, attribute observed results unexpected form magnon MR resulting magnon-electron coupling. Moreover, similar angular dependence is also found resistivity show originate combination ordinary Hall anomalous Thus interplay topological governs magnetotransport features this system.
منابع مشابه
Chiral magnetoresistance in the Weyl semimetal NbP
NbP is a recently realized Weyl semimetal (WSM), hosting Weyl points through which conduction and valence bands cross linearly in the bulk and exotic Fermi arcs appear. The most intriguing transport phenomenon of a WSM is the chiral anomaly-induced negative magnetoresistance (NMR) in parallel electric and magnetic fields. In intrinsic NbP the Weyl points lie far from the Fermi energy, making ch...
متن کاملNegative magnetoresistance in Dirac semimetal Cd3As2
A large negative magnetoresistance (NMR) is anticipated in topological semimetals in parallel magnetic fields, demonstrating the chiral anomaly, a long-sought high-energy-physics effect, in solid-state systems. Recent experiments reveal that the Dirac semimetal Cd3As2 has the record-high mobility and positive linear magnetoresistance in perpendicular magnetic fields. However, the NMR has not ye...
متن کاملNegative magnetoresistance without well-defined chirality in the Weyl semimetal TaP
Weyl semimetals (WSMs) are topological quantum states wherein the electronic bands disperse linearly around pairs of nodes with fixed chirality, the Weyl points. In WSMs, nonorthogonal electric and magnetic fields induce an exotic phenomenon known as the chiral anomaly, resulting in an unconventional negative longitudinal magnetoresistance, the chiral-magnetic effect. However, it remains an ope...
متن کاملGate-tunable negative longitudinal magnetoresistance in the predicted type-II Weyl semimetal WTe2
The progress in exploiting new electronic materials has been a major driving force in solid-state physics. As a new state of matter, a Weyl semimetal (WSM), in particular a type-II WSM, hosts Weyl fermions as emergent quasiparticles and may harbour novel electrical transport properties. Nevertheless, such a type-II WSM material has not been experimentally observed. In this work, by performing s...
متن کاملNew type of Weyl semimetal with quadratic double Weyl fermions.
Weyl semimetals have attracted worldwide attention due to their wide range of exotic properties predicted in theories. The experimental realization had remained elusive for a long time despite much effort. Very recently, the first Weyl semimetal has been discovered in an inversion-breaking, stoichiometric solid TaAs. So far, the TaAs class remains the only Weyl semimetal available in real mater...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Materials Today Physics
سال: 2022
ISSN: ['2542-5293']
DOI: https://doi.org/10.1016/j.mtphys.2022.100896