Journal
APPLIED PHYSICS LETTERS
Volume 118, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/5.0027603
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Funding
- MEXT Quantum Leap Flagship Program [JPMXS0118067395]
- JSPS KAKENHI [17H01056, 18H03770, 20H00355]
- IAEA CRP [F11020]
- GIST
- Grants-in-Aid for Scientific Research [20H00355, 17H01056] Funding Source: KAKEN
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This study characterized the excited state and ground state of negatively charged silicon vacancy (V Si -) centers in 4H-SiC using ODMR, demonstrating the potential for thermometric quantum sensors. The observation of inverted contrast between ODMR signals and the confirmation of temperature dependence in V Si - centers pave the way for future development of atomic-size thermometers inside SiC power devices. Through fabricating microscale dots of V Si - centers in a 4H-SiC p-n diode and measuring the temperature change induced by an injected current, the operation of thermometric quantum sensors was successfully demonstrated.
We characterized the excited state (ES) and the ground state (GS) of negatively charged silicon vacancy ( V Si -) centers in hexagonal silicon carbide (4H-SiC) using optically detected magnetic resonance (ODMR) to realize thermometric quantum sensors. We report the observation of inverted contrast between ODMR signals of the ES and the GS and clarify the effect of energy sublevels of spin states in 4H-SiC. We confirm that ES ODMR signals of V Si - centers are dependent on the temperature with a thermal shift of 2MHz/K on zero-field splitting (ZFS). Thus, we fabricated microscale dots of V Si - centers in a 4H-SiC p-n diode using proton beam writing and demonstrated the operation of thermometric quantum sensors by measuring the temperature change induced by an injected current. Our demonstration paves the way for the development of atomic-size thermometers inside SiC power devices for future applications.
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