Strongly Forbidden Thermodynamic Oscillations in Quasi-One-Dimensional Conductors

Abstract

We theoretically show that strongly forbidden oscillations of a specific heat have to exist in metallic phases of some quasi-one-dimensional (Q1D) conductors. They appear due to electron-electron interactions under condition of the magnetic breakdown phenomenon between the so-called open interference electron orbits. We argue that such forbidden thermodynamic oscillations can exist in Q1D conductors (TMTSF)$_2$ClO$_4$ and (Per)$_2$Au(mnt)$_2$, where TMTSF stands for tetramethyltetraselenafulvalene, Per is polycyclic aromatic hydrocarbon and mnt is mononitrotoluene, and suggest to discover them.

Figures (6)

• Figure 1: Quasi-one-dimensional Fermi surface of the organic conductor (TMTSF)$_2$ClO$_4$ in the presence of anion ordering gap, $\Delta$ [see Eq.(4)].
• Figure 2: Diagram 1: Feynman diagram of interacting quasi-one-dimensional electrons in the presence of the anion ordering gap [see Eq.(4)]. where electrons penetrate through the gap in strong magnetic fields. Electron Green functions are shown by solid lines, where the electron-electron interactions are shown by broken lines.
• Figure 3: Diagram 2: Another Feynman diagram of interacting quasi-one-dimensional electrons in the presence of the anion ordering.
• Figure 4: Diagram 3: One more Feynman diagram of interacting quasi-one-dimensional electrons in the presence of the anion ordering gap [see Eq.(4)].
• Figure 5: Diagram 4: the last Feynman diagram of interacting quasi-one-dimensional electrons in the presence of the anion ordering gap [see Eq.(4).