Coherent acoustic phonon dynamics facilitating acoustic deformation potential characterization of Mg3Sb2

Ding，Pengbo1; Zhu，Yifan2; Han，Zhijia3; Li，Long1,4; Zhang，Liang1,5; Cai，Yuhang1; Singh，David J.6; Zhang，Lenan7; Zhang，Wenqing3; Shin，Sunmi5; Yang，Jiong8,9; Liu，Weishu3; Guo，Liang1

2023-08-01

10.1103/PhysRevB.108.064310

Physical Review B   Impact Factor & Quartile

2469-9950

2469-9969

Acoustic deformation potential (ADP) quantifies carrier-acoustic phonon coupling and is essential for dissecting transport physics in thermoelectrics. Herein, we report the use of ultrafast spectroscopy of coherent acoustic phonons (CAPs) to characterize the ADP of thermoelectric materials, using Mg3Sb2 as an example. The photon energy-dependent amplitudes of the CAP-induced oscillatory reflectance were used to determine the ADP coupling constant, agreeing well with that from first-principles calculations. This method relies on the transient Coulombic interaction between carriers and acoustic phonons, free of influence from other scattering channels. It is shown that the method is particularly feasible for the study of thermoelectric materials, because their common features of strong phonon anharmonicity and small band gaps make the measurement insensitive to the uncertainty of carrier diffusion coefficients, ensuring its accuracy.

SCI

English

NI Journal Papers

First ; Corresponding

National Science Foundation of China["52176075","52172216"] ; Characteristic Innovation Project of the Department of Education of Guangdong Province[2022KTSCX109] ; Introduced Innovative R&D Team of Guangdong[2017ZT07C062] ; National Key R&D Program of China[2018YFB0703602] ; Key Research Project of Zhejiang Laboratory[2021PE0AC02] ; Singapore Ministry of Education Academic Research Fund Tier 1[A-0009121-00-00]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001063044400001

AMER PHYSICAL SOC

PHYSICS

2-s2.0-85169292813

Scopus

1.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,China
2.State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai,China
3.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,China
4.School of Microelectronics,Shenzhen Institute of Information Technology,Shenzhen,China
5.Department of Mechanical Engineering,National University of Singapore,Singapore,Singapore
6.Department of Physics and Astronomy,University of Missouri,Columbia,65211,United States
7.Department of Mechanical Engineering,Massachusetts Institute of Technology,Cambridge,02139,United States
8.Materials Genome Institute,Shanghai University,Shanghai,China
9.Zhejiang Laboratory,Hangzhou,Zhejiang,China

Ding，Pengbo,Zhu，Yifan,Han，Zhijia,et al. Coherent acoustic phonon dynamics facilitating acoustic deformation potential characterization of Mg3Sb2[J]. Physical Review B,2023,108(6).

Ding，Pengbo.,Zhu，Yifan.,Han，Zhijia.,Li，Long.,Zhang，Liang.,...&Guo，Liang.(2023).Coherent acoustic phonon dynamics facilitating acoustic deformation potential characterization of Mg3Sb2.Physical Review B,108(6).

Ding，Pengbo,et al."Coherent acoustic phonon dynamics facilitating acoustic deformation potential characterization of Mg3Sb2".Physical Review B 108.6(2023).