Figure 1

Temperature dependence of the normalized resistance of ${\left(\mathrm{TMTSF}\right)}_2\mathrm{N}{\mathrm{O}}_3$ at different pressures in zero-field (small symbols) and in finite magnetic field at 8.5 kbars (large symbols). Solid lines are guides to the eye.Reuse & Permissions

Figure 2

(a) Magnetic-field-dependent resistance of ${\left(\mathrm{TMTSF}\right)}_2\mathrm{N}{\mathrm{O}}_3$ at different temperatures for $\mathit{P}=5.8\mathrm{kbar}$ (gray lines) and $\mathit{P}=8.5\mathrm{kbars}$ (black lines) and (b) semimetal-FISDW phase transition deduced from the data at $\mathit{P}=8.5\mathrm{kbars}$. The solid line is a guide to the eye.Reuse & Permissions

Figure 3

Fourier analysis of the oscillatory magnetoresistance at different pressures. The black and gray lines correspond to data at 4.2 K and 1.6 K, respectively. The magnetic-field range is 10–36 T in (a). In (b), the magnetic-field range is 15–50 T for pressures up to 6.5 kbar. For $\mathit{P}=8.5\mathrm{kbar}$, the magnetic-field range is 22–50 T (since no oscillation can be detected below 22 T).Reuse & Permissions

Figure 4

Pressure dependence of the frequencies ${\mathit{F}}_{\mathit{H}}$ (down triangles), ${\mathit{F}}_{\mathit{L}}$ (up triangles), and ${\mathit{F}}_{\mathit{c}}$ (circles) discussed in the text. Solid symbols are deduced from Fig. 3. Open triangles and circle are from Refs. 19 (ambient pressure SDW state) and 15 (metallic state), respectively. The inset compares the pressure dependence of the frequency ${\mathit{F}}_{\mathit{H}}$ to the pressure dependence of the fast oscillations in ${\left(\mathrm{TMTSF}\right)}_2\mathrm{P}{\mathrm{F}}_6$. Open squares (SDW state) and solid square (FISDW state) are from Refs. 28, 2, respectively. The dotted lines mark the transition between SDW and metallic (in the main frame) or superconducting (in the inset) ground states. Solid lines are guides to the eye.Reuse & Permissions