Spin-density waves and the superconductivity dome in heavy electron systems with nested Fermi surfaces

P. Schlottmann

doi:10.1103/PhysRevB.89.014511

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Spin-density waves and the superconductivity dome in heavy electron systems with nested Fermi surfaces

P. Schlottmann

DOI 10.1103/PhysRevB.89.014511 · Physical Review B

T1

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Abstract

The nesting of the Fermi surfaces of an electron and a hole pocket separated by a nesting vector Q and the interaction between electrons give rise to itinerant antiferromagnetism. The order can gradually be suppressed by mismatching the nesting and a quantum critical point is obtained as the Néel temperature tends to zero. If the vector Q is commensurate with the lattice (umklapp with Q=G/2), pairs of electrons can be transferred between the pockets. This process may lead to superconductivity and a superconducting dome above the quantum critical point. We investigate the conditions under which such a dome arises. The specific heat is studied as a function of temperature and nesting mismatch, and the crossover from Fermi liquid to non-Fermi liquid is obtained.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CeRh2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
CePd2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
CeIn3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown