scholarly journals Noncollinear ferromagnetic Weyl semimetal with anisotropic anomalous Hall effect

2021 ◽  
Vol 103 (11) ◽  
Author(s):  
Hung-Yu Yang ◽  
Bahadur Singh ◽  
Jonathan Gaudet ◽  
Baozhu Lu ◽  
Cheng-Yi Huang ◽  
...  
Keyword(s):  
Hall Effect ◽  
Anomalous Hall Effect ◽  
Weyl Semimetal

scholarly journals Magnetoresistance and anomalous Hall effect in micro-ribbons of the magnetic Weyl semimetal Co3Sn2S2

2019 ◽  
Vol 114 (9) ◽  
pp. 092403 ◽  
Author(s):  
K. Geishendorf ◽  
R. Schlitz ◽  
P. Vir ◽  
C. Shekhar ◽  
C. Felser ◽  
...  
Keyword(s):  
Hall Effect ◽  
Anomalous Hall Effect ◽  
Weyl Semimetal

scholarly journals Transition from intrinsic to extrinsic anomalous Hall effect in the ferromagnetic Weyl semimetal PrAlGe1−xSix

APL Materials ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 011111 ◽  
Author(s):  
Hung-Yu Yang ◽  
Bahadur Singh ◽  
Baozhu Lu ◽  
Cheng-Yi Huang ◽  
Faranak Bahrami ◽  
...  
Keyword(s):  
Hall Effect ◽  
Anomalous Hall Effect ◽  
Weyl Semimetal

scholarly journals Intrinsic Anomalous Hall Effect in Ni-Substituted Magnetic Weyl Semimetal Co3Sn2S2

2020 ◽  
Vol 32 (4) ◽  
pp. 1612-1617 ◽  
Author(s):  
Gohil S. Thakur ◽  
Praveen Vir ◽  
Satya N. Guin ◽  
Chandra Shekhar ◽  
Richard Weihrich ◽  
...  
Keyword(s):  
Hall Effect ◽  
Anomalous Hall Effect ◽  
Weyl Semimetal

scholarly journals Large anomalous Hall effect in ferromagnetic Weyl semimetal candidate PrAlGe

APL Materials ◽  
2019 ◽  
Vol 7 (5) ◽  
pp. 051110 ◽  
Author(s):  
Biao Meng ◽  
Hao Wu ◽  
Yang Qiu ◽  
Chunlei Wang ◽  
Yong Liu ◽  
...  
Keyword(s):  
Hall Effect ◽  
Anomalous Hall Effect ◽  
Weyl Semimetal

scholarly journals Anomalous Hall Effect and Magnetoresistance in Sputter‐Deposited Magnetic Weyl Semimetal Co 2 TiGe Thin Films

2020 ◽  
pp. 2000067
Author(s):  
Denis Dyck ◽  
Andreas Becker ◽  
Jungwoo Koo ◽  
Tristan Matalla-Wagner ◽  
Jan Krieft ◽  
...  
Keyword(s):  
Thin Films ◽  
Hall Effect ◽  
Anomalous Hall Effect ◽  
Weyl Semimetal ◽  
Sputter Deposited

scholarly journals Magnetic Weyl semimetal phase in a Kagomé crystal

Science ◽  
2019 ◽  
Vol 365 (6459) ◽  
pp. 1282-1285 ◽  
Author(s):  
D. F. Liu ◽  
A. J. Liang ◽  
E. K. Liu ◽  
Q. N. Xu ◽  
Y. W. Li ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Hall Effect ◽  
Anomalous Hall Effect ◽  
Characteristic Surface ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Weyl Semimetal ◽  
Fermi Arcs ◽  
Weyl Semimetals ◽  
Ferromagnetic Crystal ◽  
Bulk Band

Weyl semimetals are crystalline solids that host emergent relativistic Weyl fermions and have characteristic surface Fermi-arcs in their electronic structure. Weyl semimetals with broken time reversal symmetry are difficult to identify unambiguously. In this work, using angle-resolved photoemission spectroscopy, we visualized the electronic structure of the ferromagnetic crystal Co3Sn2S2 and discovered its characteristic surface Fermi-arcs and linear bulk band dispersions across the Weyl points. These results establish Co3Sn2S2 as a magnetic Weyl semimetal that may serve as a platform for realizing phenomena such as chiral magnetic effects, unusually large anomalous Hall effect and quantum anomalous Hall effect.

scholarly journals Berry curvature origin of the thickness-dependent anomalous Hall effect in a ferromagnetic Weyl semimetal

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Yao Zhang ◽  
Yuefeng Yin ◽  
Guy Dubuis ◽  
Tane Butler ◽  
Nikhil V. Medhekar ◽  
...  
Keyword(s):  
Band Structure ◽  
Hall Effect ◽  
Room Temperature ◽  
Anomalous Hall Effect ◽  
Berry Curvature ◽  
Weyl Semimetal ◽  
Hall Angle ◽  
20 Nm ◽  
Structure Calculations ◽  
Spin Contribution

AbstractMagnetic Weyl semimetals with spontaneously broken time-reversal symmetry exhibit a large intrinsic anomalous Hall effect originating from the Berry curvature. To employ this large Hall current for room temperature topo-spintronics applications, it is necessary to fabricate these materials as thin or ultrathin films. Here, we experimentally demonstrate that Weyl semimetal Co2MnGa thin films (20–50 nm) show a large anomalous Hall angle ~11.4% at low temperature and ~9.7% at room temperature, which can be ascribed to the non-trivial topology of the band structure with large intrinsic Berry curvature. However, the anomalous Hall angle decreases significantly with thicknesses below 20 nm, which band structure calculations confirm is due to the reduction of the majority spin contribution to the Berry curvature. Our results suggest that Co2MnGa is an excellent material to realize room temperature topo-spintronics applications; however, the significant thickness dependence of the Berry curvature has important implications for thin-film device design.

scholarly journals Anomalous Hall effect in Weyl semimetal half-Heusler compounds RPtBi (R = Gd and Nd)

2018 ◽  
Vol 115 (37) ◽  
pp. 9140-9144 ◽  
Author(s):  
Chandra Shekhar ◽  
Nitesh Kumar ◽  
V. Grinenko ◽  
Sanjay Singh ◽  
R. Sarkar ◽  
...  
Keyword(s):  
Hall Effect ◽  
Muon Spin ◽  
Surface States ◽  
Anomalous Hall Effect ◽  
Chiral Anomaly ◽  
Heusler Compounds ◽  
Weyl Semimetal ◽  
Spin Resonance ◽  
Topological Surface ◽  
Topological Semimetals

Topological materials ranging from topological insulators to Weyl and Dirac semimetals form one of the most exciting current fields in condensed-matter research. Many half-Heusler compounds, RPtBi (R = rare earth), have been theoretically predicted to be topological semimetals. Among various topological attributes envisaged in RPtBi, topological surface states, chiral anomaly, and planar Hall effect have been observed experimentally. Here, we report an unusual intrinsic anomalous Hall effect (AHE) in the antiferromagnetic Heusler Weyl semimetal compounds GdPtBi and NdPtBi that is observed over a wide temperature range. In particular, GdPtBi exhibits an anomalous Hall conductivity of up to 60 Ω−1⋅cm−1 and an anomalous Hall angle as large as 23%. Muon spin-resonance (μSR) studies of GdPtBi indicate a sharp antiferromagnetic transition (TN) at 9 K without any noticeable magnetic correlations above TN. Our studies indicate that Weyl points in these half-Heuslers are induced by a magnetic field via exchange splitting of the electronic bands at or near the Fermi energy, which is the source of the chiral anomaly and the AHE.

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