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Pseudogaps in an incoherent metal.

K Haule¹, A Rosch, J Kroha

¹J. Stefan Institute, P.O. Box 3000, 1001 Ljubljana, Slovenia.

Physical Review Letters

|December 18, 2002

Summary

Strong inelastic scattering in metals creates incoherent dynamics and resistance. Near the Mott transition, a pseudogap forms, reducing resistivity and increasing the Hall constant, mirroring cuprate properties.

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Area of Science:

Condensed Matter Physics
Materials Science

Background:

Investigating the impact of strong inelastic scattering on metallic properties is crucial.
Understanding electron dynamics in correlated electron systems is a key challenge.

Purpose of the Study:

To explore how strong inelastic scattering affects metal properties.
To analyze the two-dimensional t-J model under these conditions.

Main Methods:

Utilized extended dynamical mean-field theory (DMFT).
Employed a generalized noncrossing approximation.
Studied the two-dimensional t-J model.

Main Results:

Short-ranged antiferromagnetic fluctuations induce incoherent single-particle dynamics.
Observed significant increases in entropy and resistance.
A pseudogap emerges near the Mott transition at low hole doping.
Resistivity drops and Hall constant increases with lower temperature and doping.

Conclusions:

The findings reveal a connection between antiferromagnetic fluctuations and metal properties.
The observed phenomena, including the pseudogap, show striking resemblance to cuprate behavior.
This research provides insights into correlated electron systems and potential material applications.

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