3 results match your criteria: "Institute of Physics Academia Sinica Taipei 11529 Taiwan[Affiliation]"
Article Synopsis
- - A record high thermoelectric figure of merit (ZT) of 2.2 at 740 K is achieved in GeSbTe single crystals, with optimal carrier concentration enhancing power factor to 56 µW cmK while reducing thermal conductivity to 1.9 Wm K.
- - Structural features like herringbone domains and stacking faults in GeSbTe lead to significant changes in phonon behavior, including an extra excitation detected around 5-6 meV using inelastic neutron scattering.
- - Density functional theory (DFT) corroborates these findings, predicting additional phonon excitations at higher energies and underscoring the shift from four-phonon to three-phonon processes, which is crucial for
Nodal-line semimetals (NLSs) represent a new type of topological semimetallic phase beyond Weyl and Dirac semimetals in the sense that they host closed loops or open curves of band degeneracies in the Brillouin zone. Parallel to the classification of type-I and type-II Weyl semimetals, there are two types of NLSs. The type-I NLS phase has been proposed and realized in many compounds, whereas the exotic type-II NLS phase that strongly violates Lorentz symmetry has remained elusive.
View Article and Find Full Text PDFRoom-Temperature Nanoseconds Spin Relaxation in WTe and MoTe Thin Films.
Adv Sci (Weinh)
June 2018
Department of Electrical and Computer Engineering, and NUSNNI National University of Singapore Singapore 117576 Singapore.
The Weyl semimetal WTe and MoTe show great potential in generating large spin currents since they possess topologically protected spin-polarized states and can carry a very large current density. In addition, the intrinsic non-centrosymmetry of WTe and MoTe endows with a unique property of crystal symmetry-controlled spin-orbit torques. An important question to be answered for developing spintronic devices is how spins relax in WTe and MoTe.
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