AI Article Synopsis
- Modern electronics require high-performance, energy-efficient transistors, but traditional charge-based transistors face heat issues due to carrier scattering.
- Researchers have developed low-loss topological phase change transistors (TPCTs) made from tellurium, utilizing its properties as a Weyl semiconductor to switch between different states of conductivity.
- The TPCTs demonstrate an impressive ON/OFF ratio of 10 at low voltages (≤2 volts) and high ON-state conductance (39 mS/μm), offering a promising approach for ultra-low power electronic devices.
Article Abstract
Modern electronics demand transistors with extremely high performance and energy efficiency. Charge-based transistors with conventional semiconductors experience substantial heat dissipation because of carrier scattering. Here, we demonstrate low-loss topological phase change transistors (TPCTs) based on tellurium, a Weyl semiconductor. By modulating the energy separation between the Fermi level and the Weyl point of tellurium through electrostatic gate modulation, the device exhibits topological phase change between Weyl (Chern number ≠ 0) and conventional (Chern number = 0) semiconductors. In the Weyl ON state, the device has low-loss transport characteristics due to the global topology of gauge fields against external perturbations; the OFF state exhibits trivial charge transport in the conventional phase by moving the Fermi level into the bandgap. The TPCTs show a high ON/OFF ratio (10) at low operation voltage (≤2 volts) and high ON-state conductance (39 mS/μm). Our studies provide alternative strategies for realizing ultralow power electronics.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9187226 | PMC |
| http://dx.doi.org/10.1126/sciadv.abn3837 | DOI Listing |
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