| Abstract |
Topological semimetals possess nodal or nodal-line phases where conduction and valence bands touch at points or lines in momentum space, respectively. Such band touching is symmetry protected and gives rise to exotic and interesting electronic properties. Coupling topological order with magnetism provides a platform for exploring time-reversal (TR) symmetry breaking topological physics, such as axion electrodynamics, inverse spin-galvanic effect, and the quantized anomalous Hall effect. The Weyl semimetal (WSM) requires breaking either TR symmetry or lattice inversion symmetry (I). By doping inversion-symmetry-broken WSM with magnetic dopants, one can expect to create a WSM with both symmetries breaking simultaneously. Here, structural, electrical, and magnetic properties of ${\mathrm{Fe}}_{x}{\mathrm{W}}_{1\ensuremath{-}x}{\mathrm{Te}}_{2}$ ($x=0$ and 0.011) are reported. It is revealed that, with a small Fe doping concentration ($x=0.011$), a ferromagnetism is induced at low temperature (10 K). Scanning tunneling microscopy and spectroscopy measurements in ${\mathrm{Fe}}_{0.011}{\mathrm{W}}_{0.989}{\mathrm{Te}}_{2}$ further reveal only substitution and no intercalated dopants being observed. The probabilities of the Fe substitutions at the two nonequivalent W sites are quantified with equal probability. The $\mathit{dI}/\mathit{dV}$ point spectra indicates that the Fe substitution in ${\mathrm{WTe}}_{2}$ manifests itself as electron doping regardless of doping sites. The results clearly reveal the possible coexistence of magnetism and Weyl points in the lightly Fe doped ${\mathrm{WTe}}_{2}$ at low temperature. This provides an ideal system for further study on the interplay between the topological Weyl points and the TR symmetry breaking. |
| Authors |
Dinesh Baral  , Rabindra Basnet  , William R. Scougale , Raz Rivlis , Dinesh Upreti , Yuri Dahnovsky , Jin Hu , TeYu Chien
|
| Journal Info |
American Physical Society | Physical Review B , vol: 109
, iss: 24
|
| Publication Date |
6/17/2024 |
| ISSN |
2469-9950 |
Type |
article |
| Open Access |
closed
|
| DOI |
https://doi.org/10.1103/physrevb.109.245419 |
| Keywords |
Two-Dimensional Electron Gases (Score: 0.482045)
|
