Ferromagnetic Weyl metal in EuAgP

IrGe4: A Predicted Weyl-Metal with a Chiral Crystal Structure

“…Reported Weyl metals/semimetals include MPn (M = Ta and Nb; Pn = P and As; space group I 4 1 md ), ,– MTe 2 (M = W and Mo; Pnm 2 1 ), , HgCr 2 Se 4 ( Fd 3̅ m ), Co 2 MnA (A = Al and Ga, Fm 3̅ m ), , RAlX (R = La, Ce, Pr, and Nd; X = Si and Ge; I 4 1 md ), , CoSi ( P 2 1 3), HfCuP ( P 3 m 1), EuAgP ( P 6 3 / mmc ), EuB 6 ( Pm 3̅ m ), EuMnSb 2 ( Pnma ), YbMnBi 2 ( P 4/ nmm ), Mn 3 X (X = Ge and Sn; P 6 3 / mmc ), , Co 3 Sn 2 S 2 ( R 3̅ m ), and MIrTe 4 (M = Ta and Nb; Pmn 2 1 ). , Nonmagnetic Weyl metals/semimetals adopt the noncentrosymmetric (NCS) crystal structure with inversion-symmetry broken (note that magnetic Weyl metals/semimetals can be NCS or centrosymmetric), which also provides opportunities to study the nonlinear optoelectronic phenomena and even ferroelectric switching in thin layers. For example, NCS Weyl semimetal TaIrTe 4 shows wireless radiofrequency rectification related to nonlinear Hall effect, and NbIrTe 4 exhibits a colossal terahertz topological response. , Apart from MIrTe 4 (M = Ta, Nb), there are no other NCS Ir-containing Weyl or Dirac metals/semimetals.…”

“…When Weyl nodes are ideally located at the Fermi level, the Weyl Fermions can lead to unique magnetoelectric properties such as chiral anomaly 2−5 and the anomalous Hall effect observable in transport measurements. 6 Reported Weyl metals/semimetals include MPn (M = Ta and Nb; Pn = P and As; space group I4 1 md), 4,7−9 MTe 2 (M = W and Mo; Pnm2 1 ), 10,11 HgCr 2 Se 4 (Fd3̅ m), 6 Co 2 MnA (A = Al and Ga, Fm3̅ m), 12,13 RAlX (R = La, Ce, Pr, and Nd; X = Si and Ge; I4 1 md), 14,15 CoSi (P2 1 3), 16 HfCuP (P3m1), 17 EuAgP (P6 3 /mmc), 18 EuB 6 (Pm3̅ m), 19 EuMnSb 2 (Pnma), 20 YbMnBi 2 (P4/nmm), 21 Mn 3 X (X = Ge and Sn; P6 3 /mmc), 22,23 Co 3 Sn 2 S 2 (R3̅ m), 24 and MIrTe 4 (M = Ta and Nb; Pmn2 1 ). 25,26 Nonmagnetic Weyl metals/semimetals adopt the noncentrosymmetric (NCS) crystal structure with inversion-symmetry broken (note that magnetic Weyl metals/semimetals can be NCS or centrosymmetric), which also provides opportunities to study the nonlinear optoelectronic phenomena and even ferroelectric switching in thin layers.…”