在限制于GaAs/A1GaAs异质结中的二维电子气上形成的量子点接触,电导出现以G0=2e2/h为单位的量子台阶,可以在单粒子模型下得到很好的解释,早期,由Glazman和Khaetskii预言,当提高源漏偏压时,电导整数平台G=N×2e2/h逐渐过渡到半整数平台G=(N-1/2×2e2/h,其中N=1,2,3…当G≥2e2/h时,这个理论的预言与实验吻合,但在G<2e2/h时,所有相关实验表明平
In the experimental synthesis of graphene using the chemical vapor deposion methods, it is inevitable to get the polycrystalline graphene composed of many grains and grain boundaries(GBs).
I will present using computational method to predict images taken by a helium ion microscope(HIM)and applied this to the images of graphene which is an important material for developing nano-scaled de
The electronic states in normal graphene monolayer(GML)and graphene bilayer(GBL)exhibit the Berry phases of π and 2π respectively. Here, We demonstrate both GML and GBL exhibit topologically nontrivia
采用Feynman-Vernon泛函积分的方法，我们推导出一个半经典的郎之万方程来描述分子结在电流作用下的动力学。分子中的原子就像布朗运动的粒子一样，感受到来自电子和声子热库的摩擦力和噪声。运用这一方法，我们研究分子结中在电流作用下的焦耳热，得到与非平衡格林函数相符的结果；我们得出了电流诱导力的非保守性，与先前的研究相符。同时，我们也预言了几个新的现象：(1)电流流过分子的时候，分子会感受到一个类
We investigate the full counting statistics of a single quantum dot strongly coupled to a local phonon and weakly tunnel-connected to two metallic electrodes. By employing the generalized non-equilibr
IOP publishes 14 world-leading journals on condensed matter physics among its 70 prestigious physics related titles.IOP has very high quality requirement for papers being considered for publication.Pa
We present two recent developments in ab initio auxiliary-field quantum Monte Carlo(AFQMC)[1] calculations of solid systems: down-folded Hamiltonians [2] and the treatment of excited states [3]. In th
The time-dependent Lanczos method is employed to investigate the ultrafast non-equilibrium response of a one-dimensional strongly correlated system,i.e.,the half-filled extended Hubbard model,when it