Phase transition and electron localization in 1T-TaS2
نویسندگان
چکیده
منابع مشابه
Electrically driven reversible insulator-metal phase transition in 1T-TaS2.
In this work, we demonstrate abrupt, reversible switching of resistance in 1T-TaS2 using dc and pulsed sources, corresponding to an insulator-metal transition between the insulating Mott and equilibrium metallic states. This transition occurs at a constant critical resistivity of 7 mohm-cm regardless of temperature or bias conditions and the transition time is significantly smaller than abrupt ...
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The temperature-dependent electronic structure of 1T-TaS2 near the Fermi level, determined by means of angle-resolved photoemission with high-energy resolution of 35 meV, exhibits a distinct energy gap associated with a metal-semiconductor transition at 180 K on cooling, whereas on warming up the retransformation occurs in the electronic structure at 280 K. The complex phase transformation beha...
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The infrared reflectance of the transition-metal chalcogenide 1T-TaS2 has been measured at temperatures from 30 K to 360 K over 30–45 000 cm ~4 meV–5.5 eV!. The optical conductivity was obtained by Kramers-Kronig analysis. At 360 K only modest traces of the phonon lines are noticeable. The phonon modes are followed by a pseudo-gap-like increase of the optical conductivity, with direct optical t...
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Scaling down materials to an atomic-layer level produces rich physical and chemical properties as exemplified in various two-dimensional (2D) crystals including graphene, transition metal dichalcogenides, and black phosphorus. This is caused by the dramatic modification of electronic band structures. In such reduced dimensions, the electron correlation effects are also expected to be significan...
متن کاملA metallic mosaic phase and the origin of Mott-insulating state in 1T-TaS2
Electron-electron and electron-phonon interactions are two major driving forces that stabilize various charge-ordered phases of matter. In layered compound 1T-TaS2, the intricate interplay between the two generates a Mott-insulating ground state with a peculiar charge-density-wave (CDW) order. The delicate balance also makes it possible to use external perturbations to create and manipulate nov...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1995
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.52.1578