Makarova G. Features of magnetic phase transitions in strongly correlated and low-dimensional electron systems.

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0405U000596

Thesis Registration Form

0405U000596.pdf

Applicant for

Specialization

  • 01.04.11 - Магнетизм

08-02-2005

Specialized Academic Board

Д 64.175.02

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine

Essay

Object - magnetic phase transitions in strongly correlated electron systems with a non-Fermi-liquid behavior and quasi-one-dimensional spin systems; goal - the analysis of mechanisms and character of phase transitions in these systems; method - Bethe ansatz,molecular field, bosonization; results and novelty - thermodynamic characteristics of an antiferromagnetic (AF) Heisenberg spin 1/2 chain with nonmagnetic impurities are found. For those systems it is shown that a strong disorder in the distribution of impurities causes a magnetic ordering. The possibility of co-existence of the spin-Peierls and AF phases at nonzero temperatures in quasi-one-dimensional systems without impurities is proven; employment - investigation of fundamental physical properties, microelectronics.

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Files

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