مشخصات پژوهش

عنوان	Quantum transport through 3D Dirac materials
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Three dimensioanl Dirac Materials, Bismuth, Landauer-Buttiker formalism
چکیده	Bismuth and its alloys provide a paradigm to realize three dimensional materials whose low-energy effective theory is given by Dirac equation in 3 + 1 dimensions. We study the quantum transport properties of three dimensional Dirac materials within the framework of Landauer–Büttiker formalism. Charge carriers in normal metal satisfying the Schrödinger equation, can be split into four-component with appropriate matching conditions at the boundary with the three dimensional Dirac material (3DDM). We calculate the conductance and the Fano factor of an interface separating 3DDM from a normal metal, as well as the conductance through a slab of 3DDM. Under certain circumstances the 3DDM appears transparent to electrons hitting the 3DDM. We find that electrons hitting the metal-3DDM interface from metallic side can enter 3DDM in a reversed spin state as soon as their angle of incidence deviates from the direction perpendicular to interface. However the presence of a second interface completely cancels this effect.
پژوهشگران	مرتضی صالحی (نفر اول)، سید اکبر جعفری (نفر دوم)