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Long-range order in quasi-one-dimensional conductors.
S N Artemenko1, Thomas Nattermann
1Institute for Radioengineering and Electronics of Russian Academy of Sciences, Mokhovaya Strasse 11-7, Moscow 125009, Russia. art@cplire.ru
Physical Review Letters
|February 1, 2008
Summary
We investigated charge-density wave order in 1D electron systems. Phonon interactions stabilize this order in quasi-1D materials, but metallic chains require additional perturbations for stability.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Solid-State Physics
Background:
- Understanding charge-density wave (CDW) formation is crucial for novel electronic materials.
- The interplay between reduced dimensionality (1D electrons) and lattice vibrations (phonons) is key to CDW stability.
Purpose of the Study:
- To investigate the conditions for stabilizing charge-density wave long-range order in repulsive 1D electron systems coupled to 3D phonons.
- To explore the role of phonon interactions in quasi-1D crystals, semiconducting nanowires, and metallic atomic chains.
Main Methods:
- Theoretical study of 1D electron systems interacting with 3D phonons.
- Analysis of stabilization mechanisms for charge-density wave order under various material conditions.
Main Results:
- Charge-density wave order can be stabilized by phonon interactions in quasi-1D crystals and semiconducting nanowires.
- For metallic atomic chains, phonon coupling alone is insufficient; commensurability or disorder is required to break translational invariance and stabilize CDW.
- The study also considers the potential stabilization of superconductivity in attractive 1D electron systems via tunnel coupling to 3D metals.
Conclusions:
- Phonon-mediated stabilization of charge-density waves is highly dependent on the dimensionality and electronic properties of the system.
- Tailoring material properties, such as introducing perturbations or utilizing specific substrates, is essential for realizing stable charge-density wave states in certain 1D systems.
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