1 2 N ov 2 00 2 Infrared properties of W - doped charge - density - wave material K 0 . 3 MoO 3
نویسنده
چکیده
The optical conductivity spectra of quasi-one dimensional compounds K0.3Mo1−xWxO3 (x=0, 0.03 and 0.15) have been studied over broad frequencies. While the dc resistivity measurements indicate no sign of CDW transition in heavily W-doped blue bronze, the optical conductivity spectra still show a single particle gap at around 0.2 eV for E parallel to the chain direction. Such impurity effect challenges our understanding about the occurrence of the optical gap with the CDW transition.
منابع مشابه
Tomonaga–Luttinger parameters for doped Mott insulators
– The Tomonaga–Luttinger parameter Kρ determines the critical behavior in quasi one-dimensional correlated electron systems, e.g., the exponent α for the density of states near the Fermi energy. We use the numerical density-matrix renormalization group method to calculate Kρ from the slope of the density-density correlation function in momentum space at zero wave vector. We check the accuracy o...
متن کاملua nt - p h / 00 11 09 6 v 1 2 3 N ov 2 00 0 su ( 2 ) and su ( 1 , 1 ) displaced number states and their nonclassical properties
We study su(2) and su(1,1) displaced number states. Those states are eigenstates of density-dependent interaction systems of quantized radiation field with classical current. Those states are intermediate states interpolating between number and displaced number states. Their photon number distribution, statistical and squeezing properties are studied in detail. It is show that these states exhi...
متن کاملCrystal structure and optical and magnetic properties of Pr(2)(MoO(4))(3).
Praseodymium molybdate Pr(2)(MoO(4))(3) was synthesized using the standard ceramic route. The crystal structure of the material has been successfully solved in superspace group I2/b(alphabeta0)00 with lattice constants a = 5.30284(4), b = 5.32699(3), c = 11.7935(1) A, gamma = 90.163(1) degrees , and the modulation vector q = 2/3a* + 0.88810(2)b*. The deviation of the q vector from a rational va...
متن کامل1 3 N ov 2 00 2 Charge and sodium ordering in β − Na 0 . 33 V 2 O 5 Raman and optical spectroscopy
Polarized Raman and optical spectra for the quasi-one dimensional metallic vanadate β−Na0.33V2O5 are reported for various temperatures. The spectra are discussed in the light of the sodium and charge ordering transitions occurring in this material, and demonstrate the presence of strong electron-phonon coupling.
متن کامل2 5 N ov 2 00 9 Preprint , arXiv : 0911 . 4433 ARITHMETIC THEORY OF HARMONIC NUMBERS
Harmonic numbers H k = P 0 3 be a prime. We show that p−1
متن کامل