Parallel transport and band theory in crystals
نویسندگان
چکیده
منابع مشابه
Theory of small-polaron band conduction in ultrapure organic crystals
We present a novel theory of charge-carrier mobilities in organic molecular crystals of high purity. Our approach is based on Holstein’s original concept of small-polaron bands but generalized with respect to the inclusion of nonlocal electron-phonon coupling. We derive an explicit expression for the mobilities as a function of temperature and, using ab-initio methods to obtain the material par...
متن کاملParallel Transport Frame in 4 -dimensional Euclidean Space
In this work, we give parallel transport frame of a curve and we introduce the relations between the frame and Frenet frame of the curve in 4-dimensional Euclidean space. The relation which is well known in Euclidean 3-space is generalized for the rst time in 4-dimensional Euclidean space. Then we obtain the condition for spherical curves using the parallel transport frame of them. The conditi...
متن کاملThermal Transport in Crystals as a Kinetic Theory of Relaxons
Thermal conductivity in dielectric crystals is the result of the relaxation of lattice vibrations described by the phonon Boltzmann transport equation. Remarkably, an exact microscopic definition of the heat carriers and their relaxation times is still missing: Phonons, typically regarded as the relevant excitations for thermal transport, cannot be identified as the heat carriers when most scat...
متن کاملSpin transport in 2 D crystals and in elemental semiconductors with multivalley band structure
In the first part of the talk, I will present our recent findings for the spin transport in 2D membranes including monolayer transition-metal dichalogonides and graphene [1]. I will focus on spin flips induced by flexural phonons (Fig. 1), and show that the spin relaxation is ultrafast for electrons in freestanding membranes while being mitigated in supported membranes. This behavior is univers...
متن کاملExtended Hückel theory for band structure , chemistry , and transport .
In this second paper, we develop transferable semiempirical extended Hückel theoretical EHT parameters for the electronic structure of another technologically important material, namely, silicon. The EHT parameters are optimized to experimental target values of the band dispersion of bulk silicon. We quantitatively benchmark our parameters to bulk electronic properties such as band edge energie...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: EPL (Europhysics Letters)
سال: 2014
ISSN: 0295-5075,1286-4854
DOI: 10.1209/0295-5075/106/60002