Fermion Condensate as a New State of Matter

被引:2
作者
Amusia, M. Ya. [1 ,2 ]
Shaginyan, V. R. [3 ]
机构
[1] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel
[2] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia
[3] Petersburg Nucl Phys Inst, Gatchina 188300, Russia
关键词
Quasiparticle; instability conditions; heavy fermion metals; spin liquid; quasicrystals; SPIN-LIQUID; PHASE; SUSCEPTIBILITY; HEAT;
D O I
10.1002/ctpp.201310045
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
We demonstrate that in very many natural systems consisting of huge numbers of identical fermions at zero temperature a phase transition can happen that leads to a quite specific state called fermion condensate. As a signal of such fermion condensation quantum phase transition serves unlimited increase of the effective mass of quasi-particles that determine the excitation spectrum of multi-fermion system under consideration. We discuss the conditions, under which this transition happens, and illustrate the physical properties of a system that is located near this phase transition. The effective mass diverge when the inter-particle interaction is repulsive and medium strong as compared to particle's kinetic energy. So, low temperature and intermediate density plasma is a good candidate for such a phenomenon. Therefore, this paper can serve as a source of stimulating ideas when exploring a possible non-Fermi liquid behavior of plasma. A common and essential feature of such systems is a possibility to introduce quasiparticles that are different, however, from those suggested by L.D. Landau almost sixty years ago, by crucial dependence of temperature, external magnetic field, pressure and so on. These systems exhibit scaling behavior of their effective mass and other characteristics that are determined by this effective mass. It is demonstrated that a huge amount of experimental data on different strongly correlated compounds suggest that they, starting from some temperature and down, are governed by the fermion condensation quantum phase transition. ((c) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
引用
收藏
页码:721 / 730
页数:10
相关论文
共 36 条
[1]  
AMUSIA MY, 1971, PHYS LETT A, VA 35, P115
[2]   Strongly correlated two dimensional fluid 3He [J].
Casey, A ;
Patel, H ;
Nyeki, J ;
Cowan, BP ;
Saunders, J .
JOURNAL OF LOW TEMPERATURE PHYSICS, 1998, 113 (3-4) :293-298
[3]   Spiky density of states in large complex Al-Mn phases [J].
de Laissardiere, Guy Trambly .
ZEITSCHRIFT FUR KRISTALLOGRAPHIE, 2009, 224 (1-2) :123-126
[4]   Magnetic ground state of an experimental S=1/2 kagome antiferromagnet [J].
de Vries, M. A. ;
Kamenev, K. V. ;
Kockelmann, W. A. ;
Sanchez-Benitez, J. ;
Harrison, A. .
PHYSICAL REVIEW LETTERS, 2008, 100 (15)
[5]  
Deguchi K, 2012, NAT MATER, V11, P1013, DOI [10.1038/NMAT3432, 10.1038/nmat3432]
[6]  
Fujiwara T., 1999, PHYS PROPERTIES QUAS
[7]   High-field phase diagram of the heavy-fermion metal YbRh2Si2 [J].
Gegenwart, P. ;
Tokiwa, Y. ;
Westerkamp, T. ;
Weickert, F. ;
Custers, J. ;
Ferstl, J. ;
Krellner, C. ;
Geibel, C. ;
Kerschl, P. ;
Mueller, K-H ;
Steglich, F. .
NEW JOURNAL OF PHYSICS, 2006, 8
[8]   Isolated flat bands and spin-1 conical bands in two-dimensional lattices [J].
Green, Dmitry ;
Santos, Luiz ;
Chamon, Claudio .
PHYSICAL REVIEW B, 2010, 82 (07)
[9]   Fractionalized excitations in the spin-liquid state of a kagome-lattice antiferromagnet [J].
Han, Tian-Heng ;
Helton, Joel S. ;
Chu, Shaoyan ;
Nocera, Daniel G. ;
Rodriguez-Rivera, Jose A. ;
Broholm, Collin ;
Lee, Young S. .
NATURE, 2012, 492 (7429) :406-410
[10]   Flat bands in topological media [J].
Heikkila, T. T. ;
Kopnin, N. B. ;
Volovik, G. E. .
JETP LETTERS, 2011, 94 (03) :233-239