fermi liquids vs non-fermi liquids
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Fermi liquids vs non-Fermi liquids. Canonical behavior of the specific heat. W. H. Lien and N. E. Phillips, Phys. Rev. 118, 958 (1960). Less canonical behavior of C(T)—notice a pronounced . Such a term, however, is still within the Fermi-liquid theory. - PowerPoint PPT PresentationTRANSCRIPT
Fermi liquids vs non-Fermi liquids
W. H. Lien and N. E. Phillips, Phys. Rev. 118, 958 (1960)
Canonical behavior of the specific heat
Less canonical behavior of C(T)—notice a pronounced 3 lnT TSuch a term, however, is still within the Fermi-liquid theory.
G. Stewart, Rev. Mod. Phys. 56, 755 (1984)
FL metals
ρ ∝T : phonons above the Debye temperature
Classical bosons: N ph ~Tω
ρ =AT 2
FL{ + CT 5
phononsbelow TD
{
ρ =const: defects
Unconventional (“bad”, “strange”, “strongly correlated”, “non-FL”) metals
Sr2RuO4
C. Proust et al. PRL 89, 147003 (2002)
Anomalous linear-in-T scaling of the resistivity in high-Tc cuprated
The most prominent “collo lungo” symptom: linear scaling of the resistivity
1τ=α
kBTh
; α ≈1
Bruin et al. Science 339, 804 (2013)
One possible sources of the symptom: Quantum Critical Point
control parameterQuantum Critical point
FMPM
T
Simplest case: Pomeranchuk (q=0) critical point between a “paramagnet” anda uniformly ordered phase
Nicklas et al. ‘99