2017/01/30 by Valla Fatemi, Quinn D. Gibson, Quinn Gibson +6 · 3 citations
Materials Science · Mathematics · Physics and Astronomy · #2D Materials and Applications #Advanced Thermoelectric Materials and Devices #Condensed matter physics #Fabrication #Limit (mathematics) #Magnetic field #Magnetoresistance #Materials science #Mathematics #Optoelectronics #Physics #Quantum mechanics #Semimetal #Silicon #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.95.041410
published as Phys. Rev. B 95, 041410(R) (2017) · 6 pages, 3 figures
arxiv created 2017/01/30 · openalex publication_date 2017/01/30 · arxiv updated 2017/02/01 · openalex created_date 2017/02/10 · openalex updated_date 2026/08/05
Here, the authors extend the study of semimetallic WTe2 to the 2D limit, utilizing new fabrication schemes that preserve sample quality to create high-mobility electronic transport devices from few-layer thick crystals, previously found to be electrically insulating. The large magnetoresistance persists in these samples and can be turned off by electrostatically tuning the system to a simple-metal (noncompensated) regime. Furthermore, the semimetallic magnetoresistance is found to follow a density-independent subquadratic power law, a topic for future study. Finally, quantum oscillations are also analyzed as a function of total carrier density, providing the first insights into the band structure of ultrathin WTe2.