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Yen-Lin Chen edited The Peierls Transition.tex
over 8 years ago
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When the lattice is cooled down below certain critical temperature, also called Peierls temperature $T_P$, the transition from the state (a) to state (b) will take place, which is known as the Peierls transition \cite{Peierls_2001}. The Peierls temperatures for NbSe$_3$ are $T_P = T_1 = 142K$ and $T_P = T_2 = 58K$, below which the CDW as a whole is pinned on the sites of atoms, resulting in increase in resistance at these two temperatures. The behavior and detailed physical models will be discussed later.
The CDW state is the ground state of quasi-1D materials below Peierls temperature. In an absolute 1D crystal, there is no CDW state, i.e. $T_P
\arrow \rightarrow 0K$