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The spin chemical potential characterizes the tendency of spins to diffuse. Probing this quantity could provide insight into materials such as magnetic insulators and spin liquids and aid optimization of spintronic devices. Here we introduce single-spin magnetometry as a generic platform for nonperturbative, nanoscale characterization of spin chemical potentials. We experimentally realize this platform using diamond nitrogen-vacancy centers and use it to investigate magnons in a magnetic insulator, finding that the magnon chemical potential can be controlled by driving the system’s ferromagnetic resonance. We introduce a symmetry-based two-fluid theory describing the underlying magnon processes, measure the local thermomagnonic torque, and illustrate the detection sensitivity using electrically controlled spin injection. Our results pave the way for nanoscale control and imaging of spin transport in mesoscopic systems.

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Du, Chunhui -  van der Sar, Toeno -  Zhou, Tony X. -  Upadhyaya, Pramey -  Casola, Francesco -  Zhang, Huiliang -  Walsworth, Ronald L. -  Tserkovnyak, Yaroslav -  Yacoby, Amir -  Onbasli, Mehmet Cengiz -  Ross, Caroline A - 

Id.: 70140382

Versión: 1.0

Estado: Final

Tipo de recurso: Article  -  http://purl.org/eprint/type/JournalArticle  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.

Requerimientos técnicos:  Browser: Any - 

Relación: [IsBasedOn] arXiv
[References] http://dx.doi.org/10.1126/science.aak9611
[References] Science

Fecha de contribución: 20-oct-2017


* 0036-8075
* 1095-9203
* Du, Chunhui et al. “Control and Local Measurement of the Spin Chemical Potential in a Magnetic Insulator.” Science 357, 6347 (July 2017): 195–198. © The Authors, some rights reserved

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