scholarly journals Topology of the Fermi surface beyond the quantum critical point

2008 ◽  
Vol 78 (7) ◽  
Author(s):  
V. A. Khodel ◽  
J. W. Clark ◽  
M. V. Zverev
Keyword(s):  
Fermi Surface ◽  
Critical Point ◽  
Quantum Critical Point ◽  
Quantum Critical

scholarly journals Fermi surface ofCr1−xVxacross the quantum critical point

2010 ◽  
Vol 82 (7) ◽  
Author(s):  
J. F. DiTusa ◽  
R. G. Goodrich ◽  
N. Harrison ◽  
E. S. Choi
Keyword(s):  
Fermi Surface ◽  
Critical Point ◽  
Quantum Critical Point ◽  
Quantum Critical

scholarly journals Fermi surface and gap parameter in high-Tc superconductors: the Stripe Quantum Critical Point scenario

1999 ◽  
Vol 317-318 ◽  
pp. 230-237 ◽  
Author(s):  
S. Caprara ◽  
C. Di Castro ◽  
M. Grilli ◽  
A. Perali ◽  
M. Sulpizi
Keyword(s):  
Fermi Surface ◽  
Critical Point ◽  
Quantum Critical Point ◽  
High Tc Superconductors ◽  
High Tc ◽  
Quantum Critical ◽  
Gap Parameter

TOPOLOGICAL PHASE TRANSITIONS IN STRONGLY CORRELATED FERMI SYSTEMS

2009 ◽  
Vol 23 (20n21) ◽  
pp. 4059-4073 ◽  
Author(s):  
J. W. CLARK ◽  
V. A. KHODEL ◽  
M. V. ZVEREV
Keyword(s):  
Phase Transitions ◽  
Fermi Surface ◽  
Critical Point ◽  
Chemical Potential ◽  
Quantum Critical Point ◽  
Strongly Correlated ◽  
Topological Phase ◽  
Fermi Systems ◽  
Quantum Critical ◽  
Topological Phase Transitions

Opportunities for topological phase transitions in strongly correlated Fermi systems near a quantum critical point are explored as an alternative to collective scenarios for experimentally observed departures from standard Fermi-liquid behavior. Attention is focused on a quantum critical point at which the effective mass is divergent due to vanishing of the quasiparticle group velocity at the Fermi surface. Working within the original Landau quasiparticle theory, it is demonstrated that the quasiparticle picture can remain meaningful beyond the quantum critical point through rearrangements of the unstable normal Fermi surface and quasiparticle spectrum. Two possibilities emerge at zero temperature, depending on whether the quasiparticle interaction is regular or singular at zero momentum transfer. In the regular case, one type of topological phase transformation leads to a state with a multiconnected Fermi surface. In the singular case, another type of topological phase transition leads to an exceptional state containing a fermion condensate – the Fermi surface swells into a volume in momentum space, within which partial occupation prevails and quasiparticle energies are pinned to the chemical potential. As the temperature increases from zero to a characteristic value Tm, a crossover can occur from the state with multiple Fermi surfaces to that containing a fermion condensate.

scholarly journals Robust Fermi-Surface Morphology of CeRhIn5 across the Putative Field-Induced Quantum Critical Point

2021 ◽  
Vol 126 (1) ◽  
Author(s):  
S. Mishra ◽  
J. Hornung ◽  
M. Raba ◽  
J. Klotz ◽  
T. Förster ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Fermi Surface ◽  
Critical Point ◽  
Quantum Critical Point ◽  
Quantum Critical

scholarly journals Fermi-surface collapse and dynamical scaling near a quantum-critical point

2010 ◽  
Vol 107 (33) ◽  
pp. 14547-14551 ◽  
Author(s):  
S. Friedemann ◽  
N. Oeschler ◽  
S. Wirth ◽  
C. Krellner ◽  
C. Geibel ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Critical Point ◽  
Quantum Critical Point ◽  
Dynamical Scaling ◽  
Quantum Critical ◽  
Surface Collapse
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