Control and local measurement of the spin chemical potential in a magnetic insulator
| Autor: | Tony X. Zhou, Amir Yacoby, Caroline A. Ross, Toeno van der Sar, Pramey Upadhyaya, Francesco Casola, Yaroslav Tserkovnyak, Huiliang Zhang, Chunhui Du, Ronald L. Walsworth, Mehmet C. Onbasli |
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| Přispěvatelé: | Onbaşlı, Mehmet Cengiz (ORCID 0000-0002-3554-7810 & YÖK ID 258783), Du, Chunhui, Van der Sar, Toeno, Zhou, Tony X., Upadhyaya, Pramey, Casola, Francesco, Zhang, Huiliang, Ross, Caroline A., Walsworth, Ronald L., Tserkovnyak, Yaroslav, Yacoby, Amir, College of Engineering, Department of Electrical and Electronics Engineering |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Magnetometer
FOS: Physical sciences Insulator (electricity) 02 engineering and technology 01 natural sciences law.invention law Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences 010306 general physics Nanoscopic scale Science and technology Physics Condensed Matter - Materials Science Mesoscopic physics Room temperature Transport Nanostructures Accumulation Spintronics Diamond Torque Multidisciplinary Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Spins Magnon Materials Science (cond-mat.mtrl-sci) 021001 nanoscience & nanotechnology Ferromagnetic resonance Condensed Matter::Strongly Correlated Electrons 0210 nano-technology |
| Zdroj: | Science |
| Popis: | The spin chemical potential characterizes the tendency of spins to diffuse. Probing the spin chemical potential 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 non-perturbative, nanoscale characterization of spin chemical potentials. We use this platform to investigate magnons in a magnetic insulator, surprisingly finding that the magnon chemical potential can be efficiently controlled by driving the system's ferromagnetic resonance. We introduce a symmetry-based two-fluid theory describing the underlying magnon processes, realize the first experimental determination of the local thermomagnonic torque, and illustrate the detection sensitivity using electrically controlled spin injection. Our results open the way for nanoscale control and imaging of spin transport in mesoscopic spin systems. 18 pages, 4 figures |
| Databáze: | OpenAIRE |
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