PROTON SPIN-LATTICE RELAXATION AND PHASON DYNAMICS IN DICHLOROBIPHENYLSULFONE

被引：20

作者：

DESOUZA, RE ^{[1
]}

ENGELSBERG, M ^{[1
]}

PUSIOL, DJ ^{[1
]}

机构：

[1] NATL UNIV CORDOBA,FAC MATEMAT ASTRON & FIS,RA-5000 CORDOBA,ARGENTINA

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.66.1505

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Larmor-frequency dependence of the proton spin-lattice relaxation rate in 4-4' bichlorobiphenylsulphone is found to vary as 1/T1 proportional omega-1/2 over more than 2 orders of magnitude of frequency below the phase transition at T = 148 K. This result is believed to constitute the first example where the classical damped-harmonic-oscillator dynamic susceptibility, with no additional self-energy terms and a strongly damped, gapless, phason spectrum, is shown to dominate the dynamics of an incommensurate system at frequencies as low as 500 kHz.

引用

页码：1505 / 1508

页数：4

共 16 条

[1]

ABRAGAM A, 1961, PRINCIPLES NUCLEAR M, pCH8

[2] EXCITATIONS IN BIPHENYL INCOMMENSURATE PHASE-III [J].

BENKERT, C ;

HEINE, V .

PHYSICAL REVIEW LETTERS, 1987, 58 (21) :2232-2234

[3] THE EFFECTS OF PRESSURE ON THE PHASES IN BIPHENYL [J].

BENKERT, C .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1987, 20 (22) :3369-3379

[4] THEORY OF STRUCTURALLY INCOMMENSURATE SYSTEMS .3. FLUCTUATION SPECTRUM OF INCOMMENSURATE PHASES [J].

BRUCE, AD ;

COWLEY, RA .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1978, 11 (17) :3609-3630

[5]

Goldman M, 1970, SPIN TEMPERATURE NUC

[6] GAPLESS PHASONS AND TRANSVERSE SOUND-WAVE ASYMMETRIES IN K2SEO4 [J].

GOODING, RJ ;

WALKER, MB .

PHYSICAL REVIEW B, 1987, 36 (10) :5377-5382

[7] EXCITATIONS IN INCOMMENSURATE BIPHENYL - PROTON SPIN-LATTICE RELAXATION [J].

LIU, SB ;

CONRADI, MS .

PHYSICAL REVIEW LETTERS, 1985, 54 (12) :1287-1290

[8] THEORY OF THE SCATTERING FROM INCOMMENSURATELY MODULATED PHASES [J].

MAYER, AP ;

COWLEY, RA .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1986, 19 (31) :6131-6152

[9] NEUTRON OBSERVATION OF PHASE AND AMPLITUDE MODES IN AN N = 4 INCOMMENSURATE SYSTEM [J].

MOUSSA, F ;

LAUNOIS, P ;

LEMEE, MH ;

CAILLEAU, H .

PHYSICAL REVIEW B, 1987, 36 (16) :8951-8954

[10] RAMAN-SPECTROSCOPIC STUDY OF PHASE-CHANGES IN THE CRYSTAL OF 4,4'-DICHLOROBENZOPHENONE [J].

PERETTI, P ;

RANSON, P .

JOURNAL OF RAMAN SPECTROSCOPY, 1979, 8 (04) :209-212

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