Abstract/Details

Superfluid and superconducting transitions in low-dimensional systems


2007 2007

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Abstract (summary)

Superfluid and superconducting phase transitions of interacting bosons are observed in diverse physical systems such as helium, superconducting materials, ultra-cold atomic gases, etc. For all these systems one-, two-, and three-dimensional (1D, 2D, and 3D) realizations are experimentally accessible. However, the current experimental focus is shifting to the low dimensional systems (e.g., films and wires) due to facilitated measurement techniques and a constant demand of technological applications. From a theoretical standpoint large fluctuations in 1D and 2D systems make them a challenging problem, especially when disorder is present. Here we study peculiarities associated with disorder in low-dimensional cases. Specifically, we are interested in the class of the systems where superfluid or superconducting transitions can be mapped to the finite temperature 2D superfluid-normal Kosterlitz-Thouless (KT) transition: (a) 2D bosonic system with a strong diagonal disorder, (b) 1D system of lattice bosons with off-diagonal disorder in the limit of large integer filling factor at zero temperature, and (c) 3D layered superconductors with no tunnelling between layers in zero external magnetic field.

Indexing (details)


Subject
Condensation
Classification
0611: Condensation
Identifier / keyword
Pure sciences, Bosons, Kosterlitz-Thouless transition, Superconductivity, Superfluidity
Title
Superfluid and superconducting transitions in low-dimensional systems
Author
Balabanyan, Karen G.
Number of pages
136
Publication year
2007
Degree date
2007
School code
0118
Source
DAI-B 68/12, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780549383895
Advisor
Prokofiev, Nikolay V.
University/institution
University of Massachusetts Amherst
Department
Physics
University location
United States -- Massachusetts
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3293933
ProQuest document ID
304847673
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/304847673
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