TY - JOUR
T1 - Strong-coupling theory of the universal linear temperature dependence of the nodal Fermi velocity in layered cuprates
AU - Chubukov, Andrey
AU - Eremin, Ilya
PY - 2008/8/29
Y1 - 2008/8/29
N2 - We explain the recently observed linear temperature dependence of the nodal Fermi velocity vF (T) in nearly optimally doped cuprates. We argue that it originates from electron-electron interaction and it is a fundamental property of an arbitrary two-dimensional (2D) Fermi liquid. We consider a spin-fermion model with input parameters extracted from the data, and we show that the T term is about 30% at 300 K, in agreement with the data. We show that the sub-leading term in vF (T) is a regular (and small) T2 correction. We also show that at a 2 kF quantum-critical point, temperature corrections to the dispersion are singular.
AB - We explain the recently observed linear temperature dependence of the nodal Fermi velocity vF (T) in nearly optimally doped cuprates. We argue that it originates from electron-electron interaction and it is a fundamental property of an arbitrary two-dimensional (2D) Fermi liquid. We consider a spin-fermion model with input parameters extracted from the data, and we show that the T term is about 30% at 300 K, in agreement with the data. We show that the sub-leading term in vF (T) is a regular (and small) T2 correction. We also show that at a 2 kF quantum-critical point, temperature corrections to the dispersion are singular.
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U2 - 10.1103/PhysRevB.78.060509
DO - 10.1103/PhysRevB.78.060509
M3 - Article
AN - SCOPUS:50949109052
SN - 1098-0121
VL - 78
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 6
M1 - 060509
ER -