Experimental perspective on three-dimensional topological semimetals

BQ Lv, T Qian, H Ding - Reviews of Modern Physics, 2021 - APS
Topological semimetals (TSMs) are characterized by bulk band crossings in their electronic
structures, which are expected to give rise to gapless electronic excitations and topological …

Transport of topological semimetals

J Hu, SY Xu, N Ni, Z Mao - Annual Review of Materials Research, 2019 - annualreviews.org
Three-dimensional (3D) topological semimetals represent a new class of topological
matters. The study of this family of materials has been at the frontiers of condensed matter …

Deterministic switching of a perpendicularly polarized magnet using unconventional spin–orbit torques in WTe2

IH Kao, R Muzzio, H Zhang, M Zhu, J Gobbo, S Yuan… - Nature materials, 2022 - nature.com
Abstract Spin–orbit torque (SOT)-driven deterministic control of the magnetic state of a
ferromagnet with perpendicular magnetic anisotropy is key to next-generation spintronic …

Ferroelectric switching of a two-dimensional metal

Z Fei, W Zhao, TA Palomaki, B Sun, MK Miller, Z Zhao… - Nature, 2018 - nature.com
A ferroelectric is a material with a polar structure whose polarity can be reversed (switched)
by applying an electric field,. In metals, itinerant electrons screen electrostatic forces …

Edge conduction in monolayer WTe2

Z Fei, T Palomaki, S Wu, W Zhao, X Cai, B Sun… - Nature Physics, 2017 - nature.com
A two-dimensional topological insulator (2DTI) is guaranteed to have a helical one-
dimensional edge mode,,,,,,,,,, in which spin is locked to momentum, producing the quantum …

Evidence for topological type-II Weyl semimetal WTe2

P Li, Y Wen, X He, Q Zhang, C **a, ZM Yu… - Nature …, 2017 - nature.com
Recently, a type-II Weyl fermion was theoretically predicted to appear at the contact of
electron and hole Fermi surface pockets. A distinguishing feature of the surfaces of type-II …

Imaging phonon-mediated hydrodynamic flow in WTe2

U Vool, A Hamo, G Varnavides, Y Wang, TX Zhou… - Nature Physics, 2021 - nature.com
In the presence of interactions, electrons in condensed-matter systems can behave
hydrodynamically, exhibiting phenomena associated with classical fluids, such as vortices …

Gate-tunable negative longitudinal magnetoresistance in the predicted type-II Weyl semimetal WTe2

Y Wang, E Liu, H Liu, Y Pan, L Zhang, J Zeng… - Nature …, 2016 - nature.com
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 …

Extremely high magnetoresistance and conductivity in the type-II Weyl semimetals WP2 and MoP2

N Kumar, Y Sun, N Xu, K Manna, M Yao, V Süss… - Nature …, 2017 - nature.com
The peculiar band structure of semimetals exhibiting Dirac and Weyl crossings can lead to
spectacular electronic properties such as large mobilities accompanied by extremely high …

Van der Waals thin films of WTe2 for natural hyperbolic plasmonic surfaces

C Wang, S Huang, Q **ng, Y **e, C Song… - Nature …, 2020 - nature.com
A hyperbolic plasmonic surface supports highly directional propagating polaritons with
extremely large density of states. Such plasmon polaritons have been realized in artificially …