What question did this study set out to answer?

To measure high-precision Hall coefficients of high-purity group-IB metals and dilute silver alloys across cryogenic temperatures and clarify low-temperature electron scattering mechanisms.

October 15, 1968Physical Review

Hall Coefficients of Cu, Ag, and Au in the Range 4.2-300°K

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Authors

JAJ. E. A. AldersonThe University of Western Australia TFT. FarrellUniversity of Liverpool CHC. M. HurdInstitute for Microstructural Sciences

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Implication

Experimental investigation reveals a low-temperature Hall coefficient maximum near 40 K in noble metals, indicating a significant phonon-drag contribution to electronic transport.

Key Points

To measure high-precision Hall coefficients of high-purity group-IB metals and dilute silver alloys across cryogenic temperatures and clarify low-temperature electron scattering mechanisms.
Measured the Hall coefficient (R) of high-purity polycrystalline copper, silver, and gold, single-crystal copper, and dilute silver alloys (AgAu, AgZn, AgCd) from 4.2 K to 300 K.
Applied a 15-kG magnetic field during measurements and conducted controls to rule out sample-size effects and trace-impurity influences.
Demonstrated that standard electronic relaxation times from electron scattering processes describe the temperature dependence of R down to approximately 50 K.
Identified an unexpected peak in the magnitude of R centered at approximately 40 K across all examined metals, attributing this low-temperature anomaly to a phonon-drag contribution.

Cite This Study

Alderson et al. (1968) studied this question.

synapsesocial.com/papers/6a9face1dfc81ffeb871db97 https://doi.org/10.1103/physrev.174.729

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Implication

Experimental investigation reveals a low-temperature Hall coefficient maximum near 40 K in noble metals, indicating a significant phonon-drag contribution to electronic transport.

Hall Coefficients of Cu, Ag, and Au in the Range 4.2-300°K

Discussion

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Implication

Key Points

Cite This Study

Hall Coefficients of Cu, Ag, and Au in the Range 4.2-300°K

Discussion

Member takes

Implication

Key Points

Cite This Study

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