Large planar Hall effect in bismuth thin films

Local Spin Ice Order Induced Planar Hall Effect in Nd–Sn Artificial Honeycomb Lattice

“…[ 14 ] The interaction between the underlying magnetism and the spin‐orbit coupling in ferromagnetic metals results in measurable Hall resistivity. [ 15 ] Typically, the planar Hall effect is prominent in 2D materials with ferromagnetic and topological characteristics or, in bulk materials where these properties are primarily confined to the surface. [ 16–18 ] There are also reports of giant PHE detection in magnetic thin film.…”

Negative magnetoresistance and sign change of the planar Hall effect due to the negative off-diagonal effective-mass in Weyl semimetals

“…Recently, anomalous galvanomagnetic effects, which cannot be interpreted by the conventional theory, have been observed in various materials [9][10][11][12][13][14][15][16][17] and have attracted renewed interest from the viewpoint of the chiral anomaly [18][19][20][21][22] or the Berry curvature [23]. In Weyl electron systems, the charge conservation is violated between different chiralities under a magnetic field parallel to the electric field; the so-called chiral anomaly [18].…”

“…Moreover, a secondary consequence of the chiral anomaly is angular oscillation with a period π in the PHE where the magnetic field is rotated in the plane parallel to the current [21,22]. Several experimental studies have suggested the possibility of detecting chiral anomaly based on the aforementioned negative LMR [9][10][11][12] and PHE [11,[13][14][15][16][17]. These anomalous behaviors cannot be interpreted on the basis of simple semiclassical theory; thus, they are believed to be evidence of chiral anomaly.…”

“…By measuring the dip structure, we can evaluate the energy difference between the Weyl point and the Fermi energy, which is crucial for the study of Weyl semimetals. Non-monotonic T -dependence (including the dip and sign change) has been observed in actual materials [13][14][15]17]. This dependence can originate from the negative off-diagonal effective-mass.…”

Higher-order Oscillatory Planar Hall Effect in Topological Kagome Metal

“…This unique transport feature usually correlates to another effect dubbed planar anisotropic magnetoresistivity (PAMR) which is characterized by measuring the longitudinal resistivity (ρ xx ) with the same measuring configuration as PHE. Obvious PHE and PAMR are observed in some fer-romagnetic metals 23,24 , nonmagnetic semimetals with strong orbital anisotropy of electronic structure 25,26 , as well as topological materials recently related to nontrivial topological states [27][28][29][30][31][32] . Empirically, they can be described as general expressions:…”