SUBMILLIMETER SURFACE IMPEDANCE AND RELAXATION - A CASE-STUDY OF QUASI-2-DIMENSIONAL YBA2CU3OX

被引:11
作者
HALBRITTER, J
机构
[1] Institut für Materialund Festkörperforschung I, Kernforschungszentrum Karlsruhe GmbH, Karlsruhe 1, 7500
来源
JOURNAL OF SUPERCONDUCTIVITY | 1992年 / 5卷 / 02期
关键词
SUPERCONDUCTORS; SURFACE IMPEDANCE; 2-DIMENSIONALITY;
D O I
10.1007/BF00618063
中图分类号
O59 [应用物理学];
学科分类号
摘要
Surface impedance measurements in the normal and superconducting state are an excellent method to study the conduction electron dynamics in metals. This holds especially in the relaxation range, i.e., for distances traveled in one r.f. period s = upsilon(F)omega (upsilon(F) is the Fermi velocity) being smaller or of the order of the penetration depth lambda and mean free path l. For materials with upsilon(F) less-than-or-equal-to 10(7) cm/sec the relaxation range is easily accessible for f > 0.1 THz. Then, in the normal state, relaxation defines the surface impedance with a penetration depth approaching the London penetration depth lambda(L), and R almost-equal-to mu0lambda(L)/2tau as surface resistance allowing a measure of lambda(L) and relaxation time tau(T, omega). In the superconducting state the photon interaction scales with xi(F)/lambda(L) = 1/gamma (xi(F) is the dimension of Cooper pairs for l --> infinity) and causes at low frequencies an absorption rate growing with gamma, which is decreasing with xi(F)/l. The rate increase proportional to gamma turns to a decrease above 0. 1 THz, being accompanied by a decrease of lambda with frequency which is stronger for large gamma and small xi(F)/l. These characteristic dependences allow a measurement of material parameters, anisotropy, and dynamics of electrons. To evaluate the consequences of the a, b, and c-direction anisotropy, the integral kernels for normal and superconducting surface impedances in its nonintegrated, angle-dependent form are presented, analyzed, and compared with impedance measurements above 0.1 THz of YBa2Cu3Ox.
引用
收藏
页码:171 / 180
页数:10
相关论文
共 42 条
[1]  
Abrikosov A. A., 1965, QUANTUM FIELD THEORE
[2]   MEASUREMENTS OF THE TEMPERATURE-DEPENDENCE OF THE MAGNETIC PENETRATION DEPTH IN YBA2CU3O7-DELTA SUPERCONDUCTING THIN-FILMS [J].
ANLAGE, SM ;
LANGLEY, BW ;
DEUTSCHER, G ;
HALBRITTER, J ;
BEASLEY, MR .
PHYSICAL REVIEW B, 1991, 44 (17) :9764-9767
[3]  
ANLAGE SM, 1990, MATER RES SOC SYMP P, V195, P333, DOI 10.1557/PROC-195-333
[4]   INFLUENCE OF THE INELASTIC ELECTRON-PHONON SCATTERING ON THE SUPERCONDUCTING SURFACE-RESISTANCE [J].
BLASCHKE, R ;
BLOCKSDORF, R .
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1982, 49 (02) :99-108
[5]   EVIDENCE FOR RAPID SUPPRESSION OF QUASI-PARTICLE SCATTERING BELOW T(C) IN YBA2CU3O7-DELTA [J].
BONN, DA ;
DOSANJH, P ;
LIANG, R ;
HARDY, WN .
PHYSICAL REVIEW LETTERS, 1992, 68 (15) :2390-2393
[6]  
Casimir H., 1967, PHILIPS TECHNISCHE R, V28, P204
[8]   ELECTROMAGNETIC RESPONSE OF LAYERED SUPERCONDUCTORS [J].
CHANG, JJ ;
SCALAPINO, DJ .
PHYSICAL REVIEW B, 1989, 40 (07) :4299-4305
[9]   SURFACE-RESISTANCE OF LASER-DEPOSITED YBA2CU3O7 FILMS [J].
DRABECK, L ;
HOLCZER, K ;
GRUNER, G ;
CHANG, JJ ;
SCALAPINO, DJ ;
INAM, A ;
WU, XD ;
NAZAR, L ;
VENKATESAN, T .
PHYSICAL REVIEW B, 1990, 42 (16) :10020-10029
[10]   METALLIC AND SUPERCONDUCTING SURFACES OF YBA2CU3O7 PROBED BY ELECTROSTATIC CHARGE MODULATION OF EPITAXIAL-FILMS [J].
FIORY, AT ;
HEBARD, AF ;
EICK, RH ;
MANKIEWICH, PM ;
HOWARD, RE ;
OMALLEY, ML .
PHYSICAL REVIEW LETTERS, 1990, 65 (27) :3441-3444