Photoinduced structural phase transitions in low-dimensional systems: Theoretical framework in charge-density-wave models

DOI Web Site 1 Citations
  • Kaoru Iwano
    a Institute of Materials Structure Science, High Energy Accelerator, Research Organization, Graduate University for Advanced Studies , 1-1 Oho, Tsukuba , 305-0801 , Japan

Description

Abstract A theoretical framework for photoinduced structural transitions (PSPTs) is described with low-dimensional charge-density-wave (CDW) systems as typical examples. Our point of view is based on the concept of domain formation, which is expected to have the structure of a hetero-phase sandwiched between two domain walls. Common to all the cases here, we assume that the initial states are stable or metastable with an appreciable energy barrier so that a thermal phase transition cannot occur. Contrary to such stationarity in the ground states, there are various possibilities in photo-excited states, depending on system conditions. In this article, we focus on one of the most basic conditions, namely, the dimensionality or the geometry of the system and survey the expected features. Based on such a basic consideration, we review the work on MX-chains, which are typical quasi-one-dimensional materials. Since their two ground states in the half-filling case are identical except for a phase difference, the...

Journal

Citations (1)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top