摘要
Electron transport through short, phase-coherent metal-graphene-metal devices occurs via resonant transmission through particle-in-a-box-like states defined by the atomically-sharp metal leads. We study the spectrum of particle-in-a-box states for single- and bi-layer graphene, corresponding to massless and massive two-dimensional （2-D） fermions. The density of states D as a function of particle number n shows the expected relationships D（n） -n1/2 for massless 2-D fermions （electrons in single-layer graphene） and D（n） -constant for massive 2-D fermions （electrons in bi-layer graphene）. The single parameters of the massless and massive dispersion relations are found, namely Fermi velocity vF = 1.1 × 10^6 m/s and effective mass m＊ = 0.032 me, where me, is the electron mass, in excellent agreement with theoretical expectations.
通过短、阶段协调的 metal-graphene-metal 设备的电子运输通过 atomically 锋利的金属领先定义的 particle-in-a-box-like 状态经由反响的传播发生。我们学习 particle-in-a-box 状态的光谱为单个层并且双性人层 graphene，相应于无团、巨大二维(2-D ) 费米子。粒子数字 n 的功能为巨大的 2-D 费米子(在双性人层 graphene 的电子) 为无团的 2-D 费米子(在单个层的 graphene 的电子) 和 D (n) 常数显示出期望的关系 D (n) n 1/2 的状态 D 的密度。无团、巨大的分散关系的单个参数被发现，也就是费密速度 F = 1.1 浲瑡潩 ? 景挠癯污湥 ? 潢摮 ? 敢睴敥 ? 桴 ? 桰湥汹猠'T 瑳瑩敵瑮 ? 景琠敨瀠牯桰特湩。
