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Link to original content: https://pubmed.ncbi.nlm.nih.gov/35862526
High ambipolar mobility in cubic boron arsenide - PubMed Skip to main page content
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. 2022 Jul 22;377(6604):437-440.
doi: 10.1126/science.abn4290. Epub 2022 Jul 21.

High ambipolar mobility in cubic boron arsenide

Jungwoo Shin #  1 , Geethal Amila Gamage #  2 , Zhiwei Ding #  1 , Ke Chen  1 , Fei Tian  2 , Xin Qian  1 , Jiawei Zhou  1 , Hwijong Lee  3 , Jianshi Zhou  3 , Li Shi  3 , Thanh Nguyen  4 , Fei Han  4 , Mingda Li  4 , David Broido  5 , Aaron Schmidt  1 , Zhifeng Ren  2 , Gang Chen  1
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High ambipolar mobility in cubic boron arsenide

Jungwoo Shin et al. Science. .

Abstract

Semiconductors with high thermal conductivity and electron-hole mobility are of great importance for electronic and photonic devices as well as for fundamental studies. Among the ultrahigh-thermal conductivity materials, cubic boron arsenide (c-BAs) is predicted to exhibit simultaneously high electron and hole mobilities of >1000 centimeters squared per volt per second. Using the optical transient grating technique, we experimentally measured thermal conductivity of 1200 watts per meter per kelvin and ambipolar mobility of 1600 centimeters squared per volt per second at the same locations on c-BAs samples at room temperature despite spatial variations. Ab initio calculations show that lowering ionized and neutral impurity concentrations is key to achieving high mobility and high thermal conductivity, respectively. The high ambipolar mobilities combined with the ultrahigh thermal conductivity make c-BAs a promising candidate for next-generation electronics.

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