𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Optical transitions in the titanium 〈0 0 0 1〉 band structure

✍ Scribed by P. Hądzel; T. Radoń

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
151 KB
Volume
54
Category
Article
ISSN
0042-207X

No coin nor oath required. For personal study only.

✦ Synopsis

Optical transitions in the bulk band structure of the titanium in the 10 0 0 12 direction have been observed using the photofield emission method. In the photocurrent-voltage characteristic the optical excitations appear as shoulders. From the voltages at which the shoulders occur, final and initial energies are estimated and compared with theory. Measurements were made for s-polarized light and therefore excitations in the bulk are predominant. The results obtained for photon energies h "1.96, 2.409, 2.497, 2.541 and 2.602 eV are compared with the calculated band structure. These experimental results show that the excitations occur only between two bands and the bands should be considerably shifted, and the minimum of the lower band should be about 0.5 eV below that calculated. Additionally, excitations from the titanium (0 0 0 1) face are observed. A single microcrystal of titanium was obtained by evaporation of titanium onto the tungsten tip emitter in ultra-high vacuum.

📜 SIMILAR VOLUMES

Calculating the Galois Group of Y′ 
Calculating the Galois Group of Y′ =   =   =  AY +   +   +  B,Y′ =   =   =  AY Completely Reducible
✍ Peter Berman 📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 291 KB

We consider a special case of the problem of computing the Galois group of a system of linear ordinary differential equations Y = M Y , M ∈ C(x) n×n . We assume that C is a computable, characteristic-zero, algebraically closed constant field with a factorization algorithm. There exists a decision pr

Stability of the Recursive Sequence xn&#
Stability of the Recursive Sequence xn + 1 = (α − βxn)/(γ + xn − 1)
✍ Mona T. Aboutaleb; M.A. El-Sayed; Alaa E. Hamza 📂 Article 📅 2001 🏛 Elsevier Science 🌐 English ⚖ 69 KB

In this paper we investigate the global asymptotic stability of the recursive , n s 0, 1, . . . , where ␣, ␤, ␥ G 0. We show that the unique positive equilibrium point of the equation is a global attractor with a basin that depends on the conditions posed on the coefficients.