Localized electronic and vibrational states in amorphous diamond

نویسندگان

چکیده

Amorphous diamond structures with more than 97% of sp3 bonding fraction are generated by quenching liquid carbon using tight-binding molecular-dynamics simulations. The electronic and vibrational properties the amorphous sample investigated.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Band-tail states and the localized-to-extended transition in amorphous diamond.

The electronic structure of a large ~4096 atom! and realistic model of amorphous diamond is studied. The density of states and the individual eigenstates in the valence-band tail and midgap region are computed with two ‘‘order-N’’ spectral electronic-structure methods: the maximum entropy method and the shifted Lanczos method. We observe approximately exponential band tails at both valenceand c...

متن کامل

Photoluminescence and Esr Studies of Localized States in Amorphous Phosphorus

Photoluminescence and electron spin resonance measurements have been performed in bulk a-red P. We observe a photoluminescence band at 1.40 eV which exhibits a sensitivity to the excitation energy employed. Specifically, the peak of this band progresses to lower energies for higher energy excitation. Electron spin resonance measurements indicate -lo1? spins/cm3 for "cold dark" and optically ind...

متن کامل

Optical Dlts Measurements of Localized States in Amorphous Chalcogenide Semiconductors

New combined optical/thermal method (optical DLTS) for the investigation of gap states is presented. The concentration and energy distribution of the gap states have been studied. The optical DLTS signal S(T) vs. temperature is calculated from the photoconductivity decay I(t,T). The effective levels and density of states for amorphous Se and As2Se3 films were obtained. Introduction.Recently, th...

متن کامل

Localized electronic states and photoemission superconducting condensate in Bi2Sr2Ca1Cu2O8+x

We present the first detailed angle-resolved photoemission evidence that there are two types of carriers that contribute to the photoemission superconducting condensate in Bi2Sr2Ca1Cu2O8+x. Our data indicate that both itinerant and somewhat localized normal state carriers can contribute to the formation of Cooper pairs. PACS numbers: 74.40.+k, 73.20.At, 79.60.-i, 74.72.Hs Typeset using REVTEX

متن کامل

The structure of electronic states in amorphous silicon.

We illustrate the structure and dynamics of electron states in amorphous Si. The nature of the states near the gap at zero temperature is discussed and especially the way the structure of the states changes for energies ranging from midgap into either band tail (Anderson transition). We then study the effect of lattice vibrations on the eigenstates, and find that electronic states near the opti...

متن کامل

ذخیره 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: Physical Chemistry Chemical Physics

سال: 2021

ISSN: ['1463-9076', '1463-9084']

DOI: https://doi.org/10.1039/d0cp06393b