Luk'yanchuk Igor A, Kopelevich Yakov
University of Picardie Jules Verne, Laboratory of Condensed Matter Physics, Amiens, 80039, France.
Phys Rev Lett. 2004 Oct 15;93(16):166402. doi: 10.1103/PhysRevLett.93.166402. Epub 2004 Oct 13.
The quantum de Haas-van Alphen (dHvA) and Shubnikov-de Haas oscillations measured in graphite were decomposed by pass-band filtering onto contributions from three different groups of carriers. Generalizing the theory of dHvA oscillations for 2D carriers with an arbitrary spectrum and by detecting the oscillation frequencies using a method of two-dimensional phase-frequency analysis which we developed, we identified these carriers as (i) minority holes having a 2D parabolic massive spectrum p(2)(perpendicular)/2m(perpendicular), (ii) massive majority electrons with a 3D spectrum and (iii) majority holes with a 2D Dirac-like spectrum +/-vp(perpendicular) which seems to be responsible for the unusual strongly-correlated electronic phenomena in graphite.
在石墨中测量的量子德哈斯 - 范阿尔芬（dHvA）和舒布尼科夫 - 德哈斯振荡通过带通滤波被分解为来自三组不同载流子的贡献。通过将具有任意能谱的二维载流子的dHvA振荡理论进行推广，并使用我们开发的二维相频分析方法检测振荡频率，我们确定这些载流子为：（i）具有二维抛物线型重能谱p(2)(垂直)/2m(垂直)的少数空穴，（ii）具有三维能谱的重多数电子，以及（iii）具有二维狄拉克型能谱±vp(垂直)的多数空穴，后者似乎是石墨中异常强关联电子现象的原因。
