Interchain coupling of quasi-one-dimensional indium chains on the In∕Si(111)-8×``2'' surface has been investigated by low-temperature scanning tunneling microscopy. We find that the longitudinal periodicity doubling is caused by pairing effects of inner indium atoms, as well as outer indium atoms, within the zigzag chains below Tc~1300.3em0exK. Whereas poor long-range order observed in the transverse direction is attributed to the nearly degenerate chains, macroscopic interchain coupling is suggested to stabilize the quasi-one-dimensional charge-density-wave phase.
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Kurata et al. (2005) studied this question.
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