Temperature- and pressure-dependent metallic states in (BEDT-TTF)(8)[Hg4Br12(C6H5Br)(2)] | |
Article | |
关键词: ORGANIC METAL; MAGNETIC OSCILLATIONS; COUPLED ORBITS; BAND-STRUCTURE; FERMI-SURFACE; SPECTRUM; CRYSTAL; SUPERCONDUCTORS; ELECTRON; NETWORK; | |
DOI : 10.1103/PhysRevB.84.045101 | |
来源: SCIE |
【 摘 要 】
Temperature-driven metal-insulator and pressure-driven insulator-metal transitions observed in (BEDT-TTF)(8)[Hg4X12(C6H5Y)(2)] with X = Y = Br are studied through band-structure calculations based on x-ray crystal-structure determination and Shubnikov-de Haas (SdH) oscillation spectra, respectively. In connection with the chemical pressure effect, the transition, which is not observed for X = Cl, is due to a gap opening linked to structural changes as the temperature decreases. Even though many-body interactions can be inferred from the pressure dependence of the SdH oscillation spectra, all the data can be described within a Fermi-liquid picture.
【 授权许可】
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