Metallic ground state of CuO chains in high-temperature superconductors

Benno Bucher; Peter Wachter

doi:10.1103/PhysRevB.51.3309

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Metallic ground state of CuO chains in high-temperature superconductors

Benno Bucher, Peter Wachter

DOI 10.1103/PhysRevB.51.3309 · Physical Review B

T1

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Abstract

We report on the metallic ground state of the CuO chains in YBa2Cu4O8. The resistivities along the a and b directions have been determined for temperatures up to 900 K. Assuming a model of two shunted conduction channels along the b direction, representing the chain and plane resistivity, the resistivity of the chain ρchain has been calculated. Below 300 K, ρchain∝T2 and approaches a T4/3 temperature dependence above 500 K. At least above Tc, two different kinds of free carriers exist simultaneously: highly correlated charge carriers inside the CuO2 plane and itinerant electrons along the CuO chain.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure unresolved	unknown