INELASTIC SCATTEING CROSS SECTION OF NEUTRONS IN FERROELECTRICS

被引：1

作者：

JAISWAL, VK

SHARMA, PK

机构：

[1] Physics Department, University of Allahabad, Allahabad

来源：

PHYSICA | 1969年 / 44卷 / 01期

关键词：

D O I：

10.1016/0031-8914(69)90111-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An expression is obtained for the one-phonon differential scattering cross section of neutrons coherently scattered from a ferroelectric crystal using the method of double-time Green functions. This has been derived from a Hamiltonian proprounded by Nettleton which considers fourth order anharmonic terms in the lattice energy. It is shown that, due to the introduction of higher order anharmonic terms, the scattering function is no longer a two-delta function but has a Lorentzian shape. The width and the shift in the frequency are obtained. © 1969.

引用

页码：69 / &

共 22 条

[1]

[Anonymous], 1960, SOV PHYS USPEKHI, DOI [DOI 10.1070/PU1960V003N03ABEH003275, 10.1070/pu1960v003n03abeh003275]

[2] THERMODYNAMIC GREENS FUNCTION METHODS IN NEUTRON SCATTERING BY CRYSTALS [J].

BAYM, G .

PHYSICAL REVIEW, 1961, 121 (03) :741-&

[3] UN DEVELOPPEMENT DU POTENTIEL DE GIBBS DUN SYSTEME QUANTIQUE COMPOSE DUN GRAND NOMBRE DE PARTICULES [J].

BLOCH, C ;

DEDOMINICIS, C .

NUCLEAR PHYSICS, 1958, 7 (05) :459-479

[4]

Egelstaff P.A., 1965, THERMAL NEUTRON SCAT

[5]

GORKOV LP, 1958, SOV PHYS JETP-USSR, V7, P505

[6] VARIATION OF CURIE TEMPERATURE WITH ELECTRIC FIELD IN FERROELECTRIC CRYSTALS [J].

JAISWAL, VK ;

SHARMA, PK .

PHYSICA, 1968, 38 (03) :409-+

[7]

KASHCHEEV VN, 1961, SOV PHYS-SOL STATE, V3, P1107

[8] ANHARMONIC EFFECTS IN COHERENT SCATTERING OF NEUTRONS BY CRYSTALS - A FORMAL TREATMENT OF SHIFT AND WIDTH OF PEAKS IN SCATTERING SPECTRUM [J].

KOKKEDEE, JJ .

PHYSICA, 1962, 28 (04) :374-&

[9] GROUND-STATE ENERGY OF A MANY-FERMION SYSTEM .2. [J].

LUTTINGER, JM ;

WARD, JC .

PHYSICAL REVIEW, 1960, 118 (05) :1417-1427

[10]

Maradudin A. A., 1963, THEORY LATTICE DYNAM

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