Low temperature anomaly of LO phonons in La1.85Sr0.15CuO4 and YBa2Cu3O7

被引：7

作者：

Egami, T ^{[1
]}

McQueeney, RJ ^{[1
]}

Petrov, Y ^{[1
]}

Yethiraj, M ^{[1
]}

Shirane, G ^{[1
]}

Endoh, Y ^{[1
]}

机构：

[1] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

来源：

HIGH TEMPERATURE SUPERCONDUCTIVITY | 1999年 / 483卷

关键词：

D O I：

10.1063/1.59621

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Inelastic neutron scattering measurements of La1.85Sr0.15CuO4 and YBa2Cu3O7 show that the dispersion of the high energy LO phonon mode along the (1,0,0) direction is strongly temperature dependent, and at low temperatures develops an anomalous feature indicative of dynamic cell-doubling. The anomaly does not change through superconducting transition and gradually disappears between 50 and 250 K in LSCO. Possible implications are discussed.

引用

页码：231 / 236

页数：6

共 28 条

[11]

MOOK HA, COMMUNICATION

[12] Unusual dispersion and line shape of the superconducting state spectra of Bi2Sr2CaCu2O8+delta [J].

Norman, MR ;

Ding, H ;

Campuzano, JC ;

Takeuchi, T ;

Randeria, M ;

Yokoya, T ;

Takahashi, T ;

Mochiku, T ;

Kadowaki, K .

PHYSICAL REVIEW LETTERS, 1997, 79 (18) :3506-3509

[13] d-wave superconductivity near charge instabilities [J].

Perali, A ;

Castellani, C ;

DiCastro, C ;

Grilli, M .

PHYSICAL REVIEW B, 1996, 54 (22) :16216-16225

[14] Exact-diagonalization study of electron-lattice coupling in the effective two-band t-J model [J].

Petrov, Y ;

Egami, T .

PHYSICAL REVIEW B, 1998, 58 (14) :9485-9491

[15] LATTICE-DYNAMICS OF LA2NIO4 [J].

PINTSCHOVIUS, L ;

BASSAT, JM ;

ODIER, P ;

GERVAIS, F ;

CHEVRIER, G ;

REICHARDT, W ;

GOMPF, F .

PHYSICAL REVIEW B, 1989, 40 (04) :2229-2238

[16]

Pintschovius L., 1994, PHYS PROPERTIES HIGH, P295

[17] CHARGED SOLITONS IN THE HARTREE-FOCK APPROXIMATION TO THE LARGE-U HUBBARD-MODEL [J].

POILBLANC, D ;

RICE, TM .

PHYSICAL REVIEW B, 1989, 39 (13) :9749-9752

[18] PHONONS IN YBA2CU3O7-DELTA [J].

REICHARDT, W ;

PYKA, N ;

PINTSCHOVIUS, L ;

HENNION, B ;

COLLIN, G .

PHYSICA C, 1989, 162 :464-465

[19]

REICHARDT W, UNPUB

[20] Implications of charge ordering for single-particle properties of high-T-c superconductors [J].

Salkola, MI ;

Emery, VJ ;

Kivelson, SA .

PHYSICAL REVIEW LETTERS, 1996, 77 (01) :155-158

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