Gauge theory of the normal state of high-Tc superconductors
Patrick A. Lee, Naoto Nagaosa
DOI 10.1103/PhysRevB.46.5621 · Physical Review B
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Abstract
Starting with the one-band t-J model and using the slave-boson method to enforce the constraint of no double occupations, we examine fluctuations about the uniform resonating-valence-bond mean-field solution. We restrict our attention to a temperature region where the bosons are not Bose condensed. The important low-energy fluctuations are described by gauge fields that are related to fluctuations in the spin chirality. The fermions and bosons are strongly coupled to the gauge field, leading to a transport time of order ħ/kBT, in agreement with experiment. The model also exhibits a Fermi surface with area 1-x, where x is the dopant concentration, consistent with the Luttinger Theorem, but the low-lying excitations have a decay width much larger than its energy, in violation of Landau’s criterion for a Fermi-liquid state. Other experimental implications of this model and the possibility of a direct measurement of the chirality fluctuations are discussed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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