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

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Published on: August 2, 2019

Triplon current generation in solids.

Yao Chen¹, Masahiro Sato², Yifei Tang¹

¹Institute for Materials Research, Tohoku University, Sendai, Japan.

Nature Communications

|September 1, 2021

Summary

This summary is machine-generated.

Researchers detected a triplon current, a flow of spin angular momentum, for the first time. This discovery in quantum dimerized spin systems opens new avenues for understanding spin transport.

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Area of Science:

Condensed matter physics
Quantum magnetism

Background:

Quantum dimerized spin systems lack magnetic order and are crucial for studying quantum spin properties.
Triplons, elementary excitations with S=1, are known to influence thermal and magnetic behavior in these systems.
A direct detection of triplon current, a spin angular momentum flow, remained elusive.

Purpose of the Study:

To experimentally detect and characterize spin Seebeck effects induced by a triplon current.
To investigate the nature of spin transport mediated by triplons in quantum spin systems.

Main Methods:

Utilized the spin-Peierls system CuGeO₃.
Investigated heating-driven triplon transport.
Measured the induced spin current and its properties.

Main Results:

Successfully observed the triplon spin Seebeck effect for the first time.
The induced spin current exhibits a positive sign, contrasting with spin-wave phenomena in magnets.
The effect persists below the spin-Peierls transition temperature.

Conclusions:

Demonstrated that triplon transport can induce a measurable spin current.
The findings align with theoretical predictions for triplon spin Seebeck effects.
This work provides direct evidence for triplon current and its role in spin dynamics.