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arXiv 1905.07985cond-mat.mtrl-sci
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hydrostatic pressure作用下六方氮化硼色心4 eV自发发射

Spontaneous emission of color centers at 4eV in hexagonal boron nitride under hydrostatic pressure

Kamil Koronski, Agata Kaminska, Nikolai D. Zhigadlo, Christine Elias, Guillaume Cassabois, Bernard Gil

摘要:

本文研究了液氦温度下流体静压范围达5GPa时色心在3.3-4 eV范围内的发光特性。光发射能量随压力的降低不如带隙敏感。这种与带隙偏移不同的行为是深陷阱的典型特征。有趣的是,流体静压揭示了在压力下不同变化的能级的存在(与该能量区域中的其余能级相比,发射波长的增加较小,甚至减少)。这一发现丰富了hBN中在UV中操作的色心的物理。

英文摘要:

The light emission properties of color centers emitting in 3.3-4 eV region are investigated for hydrostatic pressures ranging up to 5GPa at liquid helium temperature. The light emission energy decreases with pressure less sensitively than the bandgap. This behavior at variance from the shift of the bandgap is typical of deep traps. Interestingly, hydrostatic pressure reveals the existence of levels that vary differently under pressure (smaller increase of the emission wavelength compared to the rest of the levels in this energy region or even decrease of it) with pressure. This discovery enriches the physics of the color centers operating in the UV in hBN.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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