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Berry phase and de Haas-van Alphen effect in LaRhIn5.

G P Mikitik¹, Yu V Sharlai

¹B. Verkin Institute for Low Temperature Physics & Engineering, Ukrainian Academy of Sciences, Kharkov 61103, Ukraine.

Physical Review Letters

|September 28, 2004

Summary

Researchers explain experimental data on LaRhIn5 magnetization, revealing a small electron group linked to a band-contact line. This provides the first observation of the Berry phase in metals using the de Haas-van Alphen effect.

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Area of Science:

Condensed matter physics
Quantum mechanics
Materials science

Background:

Experimental data on the magnetization of LaRhIn5 was recently published by Goodrich et al.
Understanding electron behavior in metals is crucial for developing new electronic devices.

Purpose of the Study:

To explain the experimental data on the magnetization of LaRhIn5.
To demonstrate the observation of the Berry phase of electrons in metals.

Main Methods:

Analysis of experimental data on LaRhIn5 magnetization.
Application of the de Haas-van Alphen effect.

Main Results:

The magnetization of a small electron group associated with a band-contact line was detected.
This represents the first observation of the Berry phase of electrons in metals.

Conclusions:

The experimental data from Goodrich et al. can be explained by the presence of a small electron group.
The de Haas-van Alphen effect provides a method for observing the Berry phase in metals.