Harold J W Zandvliet et al 2009 J. Phys.: Condens. Matter 21 474207 doi:10.1088/0953-8984/21/47/474207
Harold J W Zandvliet, Arie van Houselt and Bene Poelsema
Show affiliationsThe structural and electronic properties of self-lacing atomic chains on Pt modified Ge(001) surfaces have been studied using low-temperature scanning tunnelling microscopy and spectroscopy. The self-lacing chains have a cross section of only one atom, are perfectly straight, thousands of atoms long and virtually defect free. The atomic chains are composed of dimers that have their bonds aligned in a direction parallel to the chain direction. At low temperatures the atomic chains undergo a Peierls transition: the periodicity of the chains doubles from a 2 × to a 4 × periodicity and an energy gap opens up. Furthermore, at low temperatures (T<80 K) novel quasi-one-dimensional electronic states are found. These quasi-one-dimensional electronic states originate from an electronic state of the underlying terrace that is confined between the atomic chains.
68.43.Fg Adsorbate structure (binding sites, geometry)
72.15.Nj Collective modes (e.g., in one-dimensional conductors)
68.37.Ef Scanning tunneling microscopy (including chemistry induced with STM)
71.30.+h Metal-insulator transitions and other electronic transitions
73.20.At Surface states, band structure, electron density of states
Issue 47 (25 November 2009)
Received 17 March 2009, in final form 3 May 2009
Published 5 November 2009
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