CAJ | 학술논문

测量了MgB-2的热电势和电阻率与温度的依赖关系.在100K—300K区间，热电势呈近似线性温度依赖关系，其斜率为正，表明载流子为空穴型且与能带贡献的图像相一致.与此对应，在此温区电阻率呈T2依赖关系.在100K以下，热电势和电阻率各自转变了其高温区的温度依赖关系.热电势在超导转变温度Te(零电阻36.6K)到100K间有一宽峰，具有声子曳引峰的特征，表明电子-声子相互作用很强.估算了一些重要的参数，如带米能EF、能带宽度等.
측량료MgB-2적열전세화전조솔여온도적의뢰관계.재100K—300K구간，열전세정근사선성온도의뢰관계，기사솔위정，표명재류자위공혈형차여능대공헌적도상상일치.여차대응，재차온구전조솔정T2의뢰관계.재100K이하，열전세화전조솔각자전변료기고온구적온도의뢰관계.열전세재초도전변온도Te(령전조36.6K)도100K간유일관봉，구유성자예인봉적특정，표명전자-성자상호작용흔강.고산료일사중요적삼수，여대미능EF、능대관도등.
The temperature-dependent thermopower and resistivity of MgB-2 were measured.In the range of 100—300K, the thermopower presents positive nearly linear temperature dependence,indicating that the charge carrier is hole and it is consistent with the energy band pattern.In contrast,the resistivity follows T+2 relationship in the same temperature range.Below 100K,thermopower and resistivity change their temperature dependence.The thermopower presents a hump between the superconducting transition temperature T-c (zero resistance,36.6K) and 100K.It has the characteristic of the phonon drag,indicating the strong electron-phonon interaction.Some important parameters are estimated according to experimental results,such as Fermi energy E-F and energy band width.