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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

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Published on: August 2, 2019

Electronic duality in strongly correlated matter.

T Park¹, M J Graf, L Boulaevskii

¹Condensed Matter and Thermal Physics, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. tuson@lanl.gov

Proceedings of the National Academy of Sciences of the United States of America

|May 9, 2008

Summary

In cerium (Ce) compounds, a single electron can exhibit both localized magnetism and itinerant superconductivity. This electronic duality allows for the coexistence of antiferromagnetism and superconductivity in CeRhIn(5).

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Area of Science:

Condensed matter physics
Quantum materials science
Materials chemistry

Background:

Superconductivity arises from electron pairing and itinerant electrons.
Magnetic order typically involves localized electrons.
The coexistence of magnetism and superconductivity in the same electrons is a complex phenomenon.

Purpose of the Study:

To investigate the coexistence of magnetism and superconductivity in cerium (Ce) compounds.
To explore the role of the 4f electron in CeRhIn(5) in mediating both phenomena.
To understand the competition and interplay between magnetic order and superconductivity.

Main Methods:

Experimental investigation of CeRhIn(5) under varying pressure and magnetic field.
Analysis of the electronic properties related to electron localization and itinerancy.
Characterization of the magnetic and superconducting states.

Main Results:

The single 4f electron in CeRhIn(5) exhibits dual behavior, supporting both localized magnetism and itinerant superconductivity.
Microscopic coexistence of antiferromagnetic order and superconductivity was observed.
The competition between these states is tunable with pressure and magnetic field.

Conclusions:

The electronic duality of the 4f electron in CeRhIn(5) provides a novel mechanism for the coexistence of magnetism and superconductivity.
This finding challenges conventional models of coexisting magnetic and superconducting states.
Offers new insights into complex quantum states in correlated electron systems.