Completely hydrostatic pressure effect of anisotropic resistivity in the 1-D organic conductor (TMTTF)2SbF6

✍ Scribed by Miho Itoi; Yasuyuki Ishii; Shuho Takekoshi; Haruhisa Kitano; Kazuyuki Matsubayashi; Yoshiya Uwatoko; Toshikazu Nakamura

• Book ID: 104084361
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 254 KB
• Volume: 470
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2009.11.138

✦ Synopsis

The anisotropic resistivity of (TMTTF) 2 SbF 6 under hydrostatic pressure was investigated up to $0.3 GPa using a helium gas pressure control system. The resistivity along the a axis shows a metallic behavior above a crossover temperature T q ($220 K at ambient pressure) and an insulating behavior below T q .

On the other hand, the temperature dependence of q b 0 and q c à was found to show a kink at a charge ordered temperature T CO . Interestingly, T q was increased with applying pressure while T CO was decreased with applying pressure. We discuss this unusual feature in terms of the pressure-temperature phase diagram in the (TMTCF) 2 X system.