Atomic Scale Design, Structure and Stability of Quantum Nanowires Located on Epitaxial Interfaces and Free‐Standing in Space. Issue 13 (29th April 2019)

• Record Type: Journal Article
• Authors: Michailov, Michail
• Other Names: Chamati Hassan guestEditor.; Paskaleva Albena guestEditor.; Genova Julia guestEditor.
• Is Part Of: Physica status solidi. Volume 216:Issue 13(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-04-29
• Subjects: atomic vacancy formations -- interfaces -- low‐dimensional systems -- nanowires -- nanowires breakdown -- surface diffusion; Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.201800864
• Languages: English
• ISSNs: 1862-6300

Abstract

Abstract : Metal nanowires excite remarkable academic curiosity as physical systems with confined geometry, reduced dimensionality, and peculiar quantum properties. The exotic features of the nanowires are strongly dependent on their size, shape and morphology, and therefore detailed knowledge of the nanowire fine atomic structure is indispensable. The present paper gives an overview on the problem of structural instability, spontaneous breakdown, and complete disintegration of metal nanowires located on epitaxial interfaces or free‐standing in space. The introduced new physical model reveals specific multi‐step vacancy‐mediated mechanism of thermaly activated nanowire rupture. Accounting for the impact of essential physical quantities on the nanowire instability including system temperature, number of defects, lattice mismatch, interface anisotropy, atomic interactions, ridgidity and flexibility, this model identify a general scenario of nanowire decomposition. The complete rupture kinetics of monatomic nanowire breakdown is described by a set of rate equations and on that background expressions are derived for physically important and experimentally accessible quantities including time‐dependent probability for nanowire breakdown and nanowire mean lifetime. The presented ensemble of studies contributes to a new type atomic‐scale design of epitaxial interfaces, giving insight into thermal instability, rupture mechanism and fine tuning of the structural, morphological and thermodynamic properties of a large variety of metal nanowires. Abstract : The present review addresses a general scenario of spontaneous breakdown and complete disintegration of metal nanowires located on epitaxial interfaces or free‐standing in space. Giving insight into a multi‐step vacancy‐mediated mechanism of rupture, the presented ensemble of studies reveals new approach to atomic‐scale design, fine‐tuning and control of structural, morphological and thermodynamic properties of atomic nanowires with different size, geometry, and space dimensionality.