Correlation length and dimensional crossover in a quasi-one-dimensional surface system

被引：2

作者：

Duerrbeck, Stefan ^{[1
]}

Hollerer, Michael ^{[2
]}

Thurner, Christoph W. ^{[1
]}

Redinger, Josef ^{[3
]}

Sterrer, Martin ^{[2
]}

Bertel, Erminald ^{[1
]}

机构：

[1] Univ Innsbruck, Inst Phys Chem, A-6020 Innsbruck, Austria

[2] Karl Franzens Univ Graz, Inst Phys, A-8010 Graz, Austria

[3] Vienna Univ Technol, Dept Appl Phys, A-1040 Vienna, Austria

来源：

PHYSICAL REVIEW B | 2018年 / 98卷 / 03期

关键词：

GINZBURG-LANDAU THEORY; AUGMENTED-WAVE METHOD; DENSITY; MODELS;

D O I：

10.1103/PhysRevB.98.035436

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The strongly anisotropic adsorbate system Br/Pt(110) exhibits an anomalous order-order phase transition due to competition between interadsorbate repulsion and charge densitywave (CDW) correlations. The phase transition is preceded by fluctuations between a normal c(2 x 2) adsorbate phase on a flat surface and a (2 x 1) phase involving a periodic lattice distortion of the substrate. Here we study the fluctuations, determine the correlation length in real and reciprocal space, and report its evolution with temperature. This allows us to identify a critical temperature. However, since around the critical temperature the adsorbate mobility freezes out, the transition remains incomplete, resulting in a 2D nematic glass at low temperature. In the temperature range, where the fluctuations occur, the system is demonstrated to be close to a 1D -> 2D crossover. This unusual phase transition driven by competing interactions exhibits several parallels to phenomena observed in unconventional superconductors.

引用

页数：6

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