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Письма в Журнал экспериментальной и теоретической физики, 2003, том 77, выпуск 2, страницы 104–108
(Mi jetpl2718)
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Эта публикация цитируется в 29 научных статьях (всего в 29 статьях)
КОНДЕНСИРОВАННЫЕ СРЕДЫ
Behavior of Fermi systems approaching the fermion condensation quantum phase transition from the disordered phase
V. R. Shaginyanab a B. P. Konstantinov Petersburg Nuclear Physics Institute, Russian Academy of Sciences
b CTSPS, Clark Atlanta University
Аннотация:
The behavior of Fermi systems which approach the fermion condensation quantum phase transition (FCQPT) from the disordered phase is considered. We show that the quasiparticle effective mass $M^*$ diverges as $M^*\propto 1/|x-x_{FC}|$ where $x$ is the system density and $x_{FC}$ is the critical point at which FCQPT occurs. Such a behavior is of general form and takes place in both three dimensional (3D) systems and two dimensional (2D) ones. Since the effective mass $M^*$ is finite, the system exhibits the Landau Fermi liquid behavior. At $|x-x_{FC}|/x_{FC}\ll 1$, the behavior can be viewed as a highly correlated one, because the effective mass is large and strongly depends on the density. In case of electronic systems the Wiedemann-Franz law is held and Kadowaki-Woods ratio is preserved. Beyond the region $|x-x_{FC}|/x_{FC}\ll 1$, the effective mass is approximately constant and the system becomes conventional Landau Fermi liquid.
Поступила в редакцию: 23.12.2002
Образец цитирования:
V. R. Shaginyan, “Behavior of Fermi systems approaching the fermion condensation quantum phase transition from the disordered phase”, Письма в ЖЭТФ, 77:2 (2003), 104–108; JETP Letters, 77:2 (2003), 99–103
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/jetpl2718 https://www.mathnet.ru/rus/jetpl/v77/i2/p104
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