Two-dimensional Melting under Quenched Disorder

Deutschländer, Sven; Horn, Tobias; Löwen, Hartmut; Maret, Georg; Keim, Peter

Two-dimensional Melting under Quenched Disorder

Dateien

Deutschlaender_244978.pdfGröße: 957.88 KBDownloads: 309

Datum

2013

Autor:innen

Deutschländer, Sven

Horn, Tobias

Löwen, Hartmut

Maret, Georg

Keim, Peter

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review Letters. 2013, 111(9). ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.111.098301

Zusammenfassung

We study the influence of quenched disorder on the two-dimensional melting behavior of superparamagnetic colloidal particles, using both video microscopy and computer simulations of repulsive parallel dipoles. Quenched disorder is introduced by pinning a fraction of the particles to an underlying substrate. We confirm the occurrence of the Kosterlitz-Thouless-Halperin-Nelson-Young scenario and observe an intermediate hexatic phase. While the fluid-hexatic transition remains largely unaffected by disorder, the hexatic-solid transition shifts to lower temperatures with increasing disorder. This results in a significantly broadened stability range of the hexatic phase. In addition, we observe spatiotemporal critical(like) fluctuations, which are consistent with the continuous character of the phase transitions. Characteristics of first-order transitions are not observed.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

DEUTSCHLÄNDER, Sven, Tobias HORN, Hartmut LÖWEN, Georg MARET, Peter KEIM, 2013. Two-dimensional Melting under Quenched Disorder. In: Physical Review Letters. 2013, 111(9). ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.111.098301

BibTex

@article{Deutschlander2013Twodi-24497,
  year={2013},
  doi={10.1103/PhysRevLett.111.098301},
  title={Two-dimensional Melting under Quenched Disorder},
  number={9},
  volume={111},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Deutschländer, Sven and Horn, Tobias and Löwen, Hartmut and Maret, Georg and Keim, Peter}
}

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Universitätsbibliographie

Ja