Dynamics of disordered heavy-fermion systems

被引：13

作者：

Chattopadhyay, A

Jarrell, M

机构：

[1] Department of Physics, University of Cincinnati, Cincinnati

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 06期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.56.R2920

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Dynamics of the disordered heavy-fermion model of Miranda et al. are calculated using an expression for the spectral function of the Anderson model that is consistent with quantum Monte Carlo results. We compute Sigma(omega) for three distributions of Kondo scales including the distribution of Bernal et al. for UCu(5-)xPd(x). The corresponding low-temperature optical conductivity shows a low-frequency pseudogap, a negative optical mass enhancement, and a linear in frequency transport scattering rate, consistent with results in Y(1-x)UxPd(3) and UCu5-xPdx. The formalism is strictly valid for a dilute system of Kondo scatterers like Y1-xUxPd3, but the leading frequency behavior at low T (much lower than bulk T-k) hold for lattice systems as well.

引用

收藏

页码：R2920 / R2923

页数：4

相关论文

共 27 条

[1] Magnetoresistance in the two-channel Anderson lattice [J].

Anders, FB ;

Jarrell, M ;

Cox, DL .

PHYSICAL REVIEW LETTERS, 1997, 78 (10) :2000-2003

[2] COPPER NMR AND THERMODYNAMICS OF UCU5-XPDX - EVIDENCE FOR KONDO DISORDER [J].

BERNAL, OO ;

MACLAUGHLIN, DE ;

LUKEFAHR, HG ;

ANDRAKA, B .

PHYSICAL REVIEW LETTERS, 1995, 75 (10) :2023-2026

[3] UNIVERSAL BEHAVIOR IN HEAVY FERMIONS [J].

CONTINENTINO, MA .

PHYSICAL REVIEW B, 1993, 47 (17) :11587-11590

[4] SELECTION-RULES FOR 2-CHANNEL KONDO MODELS OF U-4+ AND CE-3+ IONS IN METALS [J].

COX, DL .

PHYSICA B-CONDENSED MATTER, 1993, 186-88 :312-316

[5] QUADRUPOLAR KONDO EFFECT IN URANIUM HEAVY-ELECTRON MATERIALS [J].

COX, DL .

PHYSICAL REVIEW LETTERS, 1987, 59 (11) :1240-1243

[6] Optical evidence of non-Fermi-liquid behavior in U1-xThxPd2Al3 [J].

Degiorgi, L ;

Wachter, P ;

Maple, MB ;

deAndrade, MC ;

Herrmann, J .

PHYSICAL REVIEW B, 1996, 54 (09) :6065-6068

[7] The electrodynamic response of UCU3.5Pd1.5 [J].

Degiorgi, L ;

Ott, HR .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1996, 8 (48) :9901-9907

[8] FREQUENCY AND TEMPERATURE-DEPENDENCE OF THE TRANSPORT RELAXATION RATE OF THE KONDO ALLOY U0.2Y0.8PD3 - EVIDENCE FOR NON-FERMI-LIQUID BEHAVIOR [J].

DEGIORGI, L ;

OTT, HR ;

HULLIGER, F .

PHYSICAL REVIEW B, 1995, 52 (01) :42-45

[9] KONDO EFFECT IN DISORDERED-SYSTEMS [J].

DOBROSAVLJEVIC, V ;

KIRKPATRICK, TR ;

KOTLIAR, G .

PHYSICAL REVIEW LETTERS, 1992, 69 (07) :1113-1116

[10] MANY-ELECTRON SINGULARITY IN X-RAY PHOTOEMISSION AND X-RAY LINE SPECTRA FROM METALS [J].

DONIACH, S ;

SUNJIC, M .

JOURNAL OF PHYSICS PART C SOLID STATE PHYSICS, 1970, 3 (02) :285-&