title: Magnetic field and temperature sensing with atomic-scale spin defects in silicon carbide.
abstract: Quantum systems can provide outstanding performance in various sensing applications, ranging from bioscience to nanotechnology. Atomic-scale defects in silicon carbide are very attractive in this respect because of the technological advantages of this material and favorable optical and radio frequency spectral ranges to control these defects. We identified several, separately addressable spin-3/2 centers in the same silicon carbide crystal, which are immune to nonaxial strain fluctuations. Some of them are characterized by nearly temperature independent axial crystal fields, making these centers very attractive for vector magnetometry. Contrarily, the zero-field splitting of another center exhibits a giant thermal shift of -1.1 MHz/K at room temperature, which can be used for thermometry applications. We also discuss a synchronized composite clock exploiting spin centers with different thermal response.
authors.affiliation: Experimental Physics VI, Julius-Maximilian University of Würzburg, 97074 Würzburg, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Kraus
authors.affiliation: Ioffe Physical-Technical Institute, 194021 St. Petersburg, Russia.
authors.forename: V A
authors.initials: VA
authors.lastname: Soltamov
authors.affiliation: Experimental Physics VI, Julius-Maximilian University of Würzburg, 97074 Würzburg, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Fuchs
authors.affiliation: Experimental Physics VI, Julius-Maximilian University of Würzburg, 97074 Würzburg, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Simin
authors.affiliation: Experimental Physics VI, Julius-Maximilian University of Würzburg, 97074 Würzburg, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Sperlich
authors.affiliation: Ioffe Physical-Technical Institute, 194021 St. Petersburg, Russia.
authors.forename: P G
authors.initials: PG
authors.lastname: Baranov
authors.affiliation: Experimental Physics VI, Julius-Maximilian University of Würzburg, 97074 Würzburg, Germany.
authors.forename: G V
authors.initials: GV
authors.lastname: Astakhov
authors.affiliation: 1] Experimental Physics VI, Julius-Maximilian University of Würzburg, 97074 Würzburg, Germany [2] Bavarian Center for Applied Energy Research (ZAE Bayern), 97074 Würzburg, Germany.
authors.forename: V
authors.initials: V
authors.lastname: Dyakonov
mesh_terms: D015374:Biosensing Techniques; D017554:Carbon Compounds, Inorganic / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D060526:Magnetic Fields; D060306:Magnetometry; D036103:Nanotechnology; D011789:Quantum Theory; D017655:Silicon Compounds / Q000737:chemistry*; D013696:Temperature
chemical_list: D017554:Carbon Compounds, Inorganic; D017655:Silicon Compounds; C022088:silicon carbide