Temperature-Dependent Energy-Level Shifts of Spin Defects in Hexagonal Boron Nitride

被引：72

作者：

Liu, Wei ^{[1
,2
]}

Li, Zhi-Peng ^{[1
,2
]}

Yang, Yuan-Ze ^{[1
,2
]}

Yu, Shang ^{[1
,2
]}

Meng, Yu ^{[1
,2
]}

Wang, Zhao-An ^{[1
,2
]}

Li, Ze-Cheng ^{[1
,2
]}

Guo, Nai-Jie ^{[1
,2
]}

Yan, Fei-Fei ^{[1
,2
]}

Li, Qiang ^{[1
,2
]}

Wang, Jun-Feng ^{[1
,2
]}

Xu, Jin-Shi ^{[1
,2
]}

Wang, Yi-Tao ^{[1
,2
]}

Tang, Jian-Shun ^{[1
,2
]}

Li, Chuan-Feng ^{[1
,2
]}

Guo, Guang-Can ^{[1
,2
]}

机构：

[1] Univ Sci & Technol China, CAS Key Lab Quantum Informat, Hefei 230052, Peoples R China

[2] Univ Sci & Technol China, CAS Ctr Excellence Quantum Informat & Quantum Phy, Hefei 230052, Peoples R China

来源：

ACS PHOTONICS | 2021年 / 8卷 / 07期

基金：

中国国家自然科学基金;

关键词：

van der Waals materials; point defect; electron spin resonance; Varshni empirical equation; thermal expansion; temperature sensor; THERMAL-CONDUCTIVITY; PARAMETERS; INSULATOR; EMISSION; DIAMOND; CENTERS;

D O I：

10.1021/acsphotonics.1c00320

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Two-dimensional hexagonal boron nitride (hBN) has attracted much attention as a platform for realizing integrated nanophotonics, and a collective effort has been focused on spin defect centers. Here, the temperature dependence of the optically detected magnetic resonance (ODMR) spectrum of negatively charged boron vacancy (V-B(-)) ensembles in the range of 5-600 K is investigated. The microwave transition energy is found to decrease monotonically with increasing temperature and can be described by the Varshni empirical equation very well. Considering the proportional relation between energy-level shifts and the reciprocal lattice volume (V-1), thermal expansion might be the dominant cause for energy-level shifts. We also demonstrate that the V-B(-) defects are stable at up to 600 K. Moreover, we find that there are evident differences among different hBN nanopowders, which might originate from the local strain and distance of defects from the flake edges. Our results may provide insight into the spin properties of V-B(-) and for the realization of miniaturized, integrated thermal sensors.

引用

页码：1889 / 1895

页数：7

共 65 条

[1] Color Centers in Hexagonal Boron Nitride Monolayers: A Group Theory and Ab Initio Analysis [J].