High pressure Raman study of Y-124

被引：2

作者：

Lampakis, D

Tatsi, A

Liarokapis, E

Karpinski, J

机构：

[1] Natl Tech Univ Athens, Dept Phys, Athens 15780, Greece

[2] ETH, Festkorperphys Lab, CH-8093 Zurich, Switzerland

来源：

HIGH PRESSURE RESEARCH | 2003年 / 23卷 / 1-2期

关键词：

Raman; phonons; high pressure; superconductors; YBa2Cu4O8;

D O I：

10.1080/0895795031000147849

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this work, a micro-Raman study under high hydrostatic pressure (up to similar to5.5 GPa) has been carried on YBa2Cu4O8 and Y(Ba, Sr)(2)Cu4O8 single crystals at room temperature. In both samples, seven strong modes, of A(g) symmetry, and one weak, of B-3g symmetry, have been observed and examined in connection with previously published results concerning YBa2Cu4O8. With the Sr substitution for Ba, the ambient pressure measurements show an upward shift in energy for all modes, except those that involve vibrations of the plane and apex oxygen atoms. With increasing hydrostatic pressure all phonons shift to higher energies. Anomalous nonlinear pressure behaviour has been observed for three phonons, which is correlated with the pressure dependence of T-c of these compounds.

引用

页码：123 / 128

页数：6

共 11 条

[1] STRONG PRESSURE-DEPENDENCE OF TC OF THE NEW 80-K PHASE YBA2CU4O8+X [J].

BUCHER, B ;

KARPINSKI, J ;

KALDIS, E ;

WACHTER, P .

PHYSICA C, 1989, 157 (03) :478-482

[2] OPTICAL PHONONS IN YBA2CU4O8 AND Y2BA4CU7O15-DELTA [J].

HEYEN, ET ;

LIU, R ;

THOMSEN, C ;

KREMER, R ;

CARDONA, M ;

KARPINSKI, J ;

KALDIS, E ;

RUSIECKI, S .

PHYSICAL REVIEW B, 1990, 41 (16) :11058-11067

[3] ANOMALOUS BEHAVIOR OF THE 147 CM(-1) CU(2) RAMAN MODE IN YBA2CU4O8 UNDER HIGH-PRESSURE - SIGNATURE OF CHANGE IN THE ELECTRONIC-STATE OF THE CUO2 PLANE [J].

KAKIHANA, M ;

ARASHI, H ;

YASHIMA, M ;

YOSHIMURA, M ;

BORJESSON, L ;

KALL, M .

PHYSICA C, 1994, 230 (1-2) :199-206

[4] BULK SYNTHESIS OF THE 81-K SUPERCONDUCTOR YBA2CU4O8 AT HIGH OXYGEN-PRESSURE [J].

KARPINSKI, J ;

KALDIS, E ;

JILEK, E ;

RUSIECKI, S ;

BUCHER, B .

NATURE, 1988, 336 (6200) :660-662

[5] Influence of Sr substitution on the structure, charge distribution, and critical temperature of Y(Ba1-xSrx)2Cu4O8 single crystals -: art. no. 094518 [J].

Karpinski, J ;

Kazakov, SM ;

Angst, M ;

Mironov, A ;

Mali, M ;

Roos, J .

PHYSICAL REVIEW B, 2001, 64 (09)

[6] RAMAN-SPECTRA AND NORMAL MODE ASSIGNMENTS OF SUPERCONDUCTING YBA2CU4O8 SINGLE-CRYSTALS [J].

KRANTZ, MC ;

ROSEN, HJ ;

MACFARLANE, RM ;

ASMAR, NG ;

MORRIS, DE .

PHYSICA C, 1989, 162 :1089-1090

[7] Raman studies of the high pressure effects in high Tc superconductors [J].

Liarokapis, E ;

Lampakis, D ;

Nishizaki, T ;

Panagopoulos, C .

HIGH PRESSURE RESEARCH, 2000, 18 (1-6) :109-116

[8] PRESSURE-DEPENDENCE OF TC AND HC2 OF YBA2CU4O8 [J].

SCHOLTZ, JJ ;

VANEENIGE, EN ;

WIJNGAARDEN, RJ ;

GRIESSEN, R .

PHYSICAL REVIEW B, 1992, 45 (06) :3077-3092

[9] SUPERCONDUCTIVITY AT 108-K IN YBA2CU4O8 AT PRESSURES UP TO 12 GPA [J].

VANEENIGE, EN ;

GRIESSEN, R ;

WIJNGAARDEN, RJ ;

KARPINSKI, J ;

KALDIS, E ;

RUSIECKI, S ;

JILEK, E .

PHYSICA C, 1990, 168 (5-6) :482-488

[10] PHONON RAMAN-SCATTERING OF POLYCRYSTALLINE YBA2CU4O8 UNDER HYDROSTATIC-PRESSURE [J].

WATANABE, N ;

KOSUGE, M ;

KOSHIZUKA, N ;

ADACHI, S ;

YAMAUCHI, H .

PHYSICAL REVIEW B, 1994, 49 (13) :9226-9229

← 1 2 →