phase transitions
A new member of Peierls transition
01/04/08 11:08
Peierls transition refers to the phenomena in which metals undergo phase changes associated with Fermi surface instability and periodic lattice distortion due to the interaction of electrons and phonons at
k = 2k_F. R. E. Peierls proposed the mechanism in his famous Quantum Theory of Solids (1955) in order to elucidate why low-symmetry structures are stabilized in crystalline Sb and Bi. Later, phase transitions found in 1970s in materials with low-dimensional Fermi surfaces have shown to be driven by this mechanism.![](page1_blog_entry1_summary_1.jpg)
Owing to intensive studies, it has been established that the qualitative behaviour of the Peierls transition is well characterized by the strength of electron-phonon coupling as a dominant parameter. Thus the transitions are more often categorised simply into two classes: weak-coupling and strong-coupling types.
Our study have shown that the classification scheme is not appropreate...
Read more...