C-axis oriented Ga-doped ZnO(GZO) films with various thicknesses were deposited on glass substrate by radio frequency(RF) magnetron sputtering. The dependence of crystal structure,electrical,and optical properties of ...C-axis oriented Ga-doped ZnO(GZO) films with various thicknesses were deposited on glass substrate by radio frequency(RF) magnetron sputtering. The dependence of crystal structure,electrical,and optical properties of the GZO films on crystalline size were systematically studied. The results showed that the texture coefficient of (002) peak (TC(002)) decreases with increasing crystalline size. The Hall mobility m was reciprocal to electron effective mass and the fitted relaxation time s was 0.11±0.01 ms. With the increase of average crystalline size,the resistivity increased slightly,which is caused by the competition of (002) and(101) plane,introducing in some defects and leading to carrier density reduction. The optical band gap was in the range from 3.454 to 3.319 eV with increasing crystalline size from 26.96 to 30.88 nm,showing a negative relationship. The dependence of optical band gap (Eopg) on the crystalline size(R) can be qualitatively explained by a quantum confinement effect. The relationship between Eopg and R of GZO films suggests that tuning up optical properties for desired applications can be achieved by controlling the crystalline size.展开更多
The effect of finite coupling corrections to the Langevin diffusion coefficients on a moving heavy quarkin the Super Yang-Mills plasma was investigated.These corrections are related to curvature squared corrections in...The effect of finite coupling corrections to the Langevin diffusion coefficients on a moving heavy quarkin the Super Yang-Mills plasma was investigated.These corrections are related to curvature squared corrections inthe corresponding gravity sector.We compared the results of both longitudinal and perpendicular Langevin diffusion coefficients with those for N=4 Super Yang-Mills plasma.It was observed that the curvature-squared corrections influence the Langevin diffusion coefficients,and the corrections for both Langevin diffusion coefficientsdemonstrate the dependence on the velocity of the moving heavy quark and the specifics of the higher derivative correction.In addition,we conducted calculations for the Langevin diffusion coefficients of a moving heavy quarkwithin the Gauss-Bonnet background.展开更多
基金supported by the National Natural Science Foundation of China (No.51071038)Sichuan Province Science Foundation for Youths (No.2010JQ0002)State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,China (No.20131309)
文摘C-axis oriented Ga-doped ZnO(GZO) films with various thicknesses were deposited on glass substrate by radio frequency(RF) magnetron sputtering. The dependence of crystal structure,electrical,and optical properties of the GZO films on crystalline size were systematically studied. The results showed that the texture coefficient of (002) peak (TC(002)) decreases with increasing crystalline size. The Hall mobility m was reciprocal to electron effective mass and the fitted relaxation time s was 0.11±0.01 ms. With the increase of average crystalline size,the resistivity increased slightly,which is caused by the competition of (002) and(101) plane,introducing in some defects and leading to carrier density reduction. The optical band gap was in the range from 3.454 to 3.319 eV with increasing crystalline size from 26.96 to 30.88 nm,showing a negative relationship. The dependence of optical band gap (Eopg) on the crystalline size(R) can be qualitatively explained by a quantum confinement effect. The relationship between Eopg and R of GZO films suggests that tuning up optical properties for desired applications can be achieved by controlling the crystalline size.
基金supported by the Major Project of Basic and Applied Basic Research of Guangdong Province,China(2020B0301030008)the Natural Science Foundation of China with Project(11935007)the China Scholarship Council(202306770010)。
文摘The effect of finite coupling corrections to the Langevin diffusion coefficients on a moving heavy quarkin the Super Yang-Mills plasma was investigated.These corrections are related to curvature squared corrections inthe corresponding gravity sector.We compared the results of both longitudinal and perpendicular Langevin diffusion coefficients with those for N=4 Super Yang-Mills plasma.It was observed that the curvature-squared corrections influence the Langevin diffusion coefficients,and the corrections for both Langevin diffusion coefficientsdemonstrate the dependence on the velocity of the moving heavy quark and the specifics of the higher derivative correction.In addition,we conducted calculations for the Langevin diffusion coefficients of a moving heavy quarkwithin the Gauss-Bonnet background.
