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ЖУРНАЛЫ // Письма в Журнал экспериментальной и теоретической физики // Архив

Письма в ЖЭТФ, 2003, том 77, выпуск 2, страницы 104–108 (Mi jetpl2718)

Эта публикация цитируется 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.

PACS: 71.10.Hf, 71.27.+a, 74.72.-h

Поступила в редакцию: 23.12.2002

Язык публикации: английский


 Англоязычная версия: Journal of Experimental and Theoretical Physics Letters, 2003, 77:2, 99–103

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