Dual nature of a charge-density-wave transition on In/Cu(001)

T. Nakagawa, H. Okuyama, M. Nishijima, T. Aruga, H. W. Yeom, E. Rotenberg, B. Krenzer, S. D. Kevan

Research output: Contribution to journalArticlepeer-review

Abstract

A surface phase transition on In/Cu(001) with In coverage of 0.63 was studied. The structural analysis shows that the reversible phase transition at 405 K between the high-temperature (2 × 2) and the low-temperature (Formula presented) phases belongs to an order-disorder type. The angle-resolved photoemission experiment shows that the low-temperature phase is stabilized by the partial gap formation at the Fermi surface, indicating that the transition is due to the Peierls-type Fermi-surface nesting. While the above observations point to a strong-coupling charge-density-wave (SCDW) scenario, the temperature-dependent behavior of the gap is in better agreement with the weak-coupling CDW theory. Thus, the results serve the first experimental characterization of the CDW transition driven cooperatively by electronic and lattice entropies.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume67
Issue number24
DOIs
Publication statusPublished - Jun 10 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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