TY - JOUR
T1 - Velocity renormalization in a quasi–two-dimensional electron gas
AU - Weger, M.
AU - Burlachkov, L.
AU - Kaveh, M.
PY - 1992/7/15
Y1 - 1992/7/15
N2 - It is shown that for a quasi–two-dimensional electron gas embedded in a material with a large dielectric constant ε, the plasma frequency ωp(q) for small momenta q may be less than the quasi-particle excitation energy υ(kF) ∙ q. Under this condition, the screening of the Coulomb interaction is determined by the single-particle density of states. This gives rise to a significant increase of the velocity υ near the Fermi surface and, in turn, to an anomalous renormalization of the transport properties. The results are applied to explain the normal properties of the high-Tcsuperconductors.
AB - It is shown that for a quasi–two-dimensional electron gas embedded in a material with a large dielectric constant ε, the plasma frequency ωp(q) for small momenta q may be less than the quasi-particle excitation energy υ(kF) ∙ q. Under this condition, the screening of the Coulomb interaction is determined by the single-particle density of states. This gives rise to a significant increase of the velocity υ near the Fermi surface and, in turn, to an anomalous renormalization of the transport properties. The results are applied to explain the normal properties of the high-Tcsuperconductors.
UR - http://www.scopus.com/inward/record.url?scp=84860381661&partnerID=8YFLogxK
U2 - 10.1209/0295-5075/19/6/011
DO - 10.1209/0295-5075/19/6/011
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AN - SCOPUS:84860381661
SN - 0295-5075
VL - 19
SP - 505
EP - 511
JO - Lettere Al Nuovo Cimento
JF - Lettere Al Nuovo Cimento
IS - 6
ER -