SUPERCONDUCTING ENERGY-GAP FROM INFRARED RESPONSE MEASUREMENTS IN ANTIGRANULOCYTES TL2BA2CACU2O8 FILMS

被引:14
作者
LENGFELLNER, H
SCHNEIDER, G
BETZ, J
HOGAN, M
PRETTL, W
RENK, KF
机构
[1] Institut für Angewandte Physik, Universität Regensburg, Regensburg
来源
EUROPHYSICS LETTERS | 1991年 / 15卷 / 03期
关键词
D O I
10.1209/0295-5075/15/3/019
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The resistance response of polycrystalline Tl2Ba2CaCu2O8 films to short laser pulses has been investigated for a wide range of far-infrared frequencies. For temperatures T << T(c) a drastic change in response time is observed at a critical frequency nu(c) congruent-to 4 THz. The time constant increases from about 1 ns at nu < nu(c) to 1 mu-s at nu > nu(c). The critical frequency is attributed to a superconducting energy gap with 2-DELTA(0)/k(B) T(c) congruent-to 2.
引用
收藏
页码:343 / 347
页数:5
相关论文
共 21 条
[1]   SUPERCONDUCTING TL-CA-BA-CU-O THIN-FILMS PREPARED BY DIFFUSION OF TL INTO AN EXCIMER LASER ABLATED CA2BA2CU3OX FILM [J].
BETZ, J ;
LENGFELLNER, H ;
DUSCHL, E ;
MEIDENBAUER, K ;
RENK, KF .
PHYSICA C, 1989, 162 :133-134
[2]   FAST BOLOMETRIC RESPONSE BY HIGH-TC DETECTORS MEASURED WITH SUBNANOSECOND SYNCHROTRON RADIATION [J].
CARR, GL ;
QUIJADA, M ;
TANNER, DB ;
HIRSCHMUGL, CJ ;
WILLIAMS, GP ;
ETEMAD, S ;
DUTTA, B ;
DEROSA, F ;
INAM, A ;
VENKATESAN, T ;
XI, X .
APPLIED PHYSICS LETTERS, 1990, 57 (25) :2725-2727
[3]   ORIGIN OF SUPERCONDUCTIVE GLASSY STATE AND EXTRINSIC CRITICAL CURRENTS IN HIGH-TC OXIDES [J].
DEUTSCHER, G ;
MULLER, KA .
PHYSICAL REVIEW LETTERS, 1987, 59 (15) :1745-1747
[4]   INTERACTION OF PICOSECOND OPTICAL PULSES WITH HIGH-TC SUPERCONDUCTING FILMS [J].
DONALDSON, WR ;
KADIN, AM ;
BALLENTINE, PH ;
SOBOLEWSKI, R .
APPLIED PHYSICS LETTERS, 1989, 54 (24) :2470-2472
[5]   OPTICAL-RESPONSE OF EPITAXIAL-FILMS OF YBA2CU3O7-DELTA [J].
FORRESTER, MG ;
GOTTLIEB, M ;
GAVALER, JR ;
BRAGINSKI, AI .
APPLIED PHYSICS LETTERS, 1988, 53 (14) :1332-1334
[6]   INFRARED REFLECTION OF EPITAXIAL TL2BA2CACU2O8 THIN-FILMS IN THE NORMAL AND SUPERCONDUCTING STATES [J].
FOSTER, CM ;
VOSS, KF ;
HAGLER, TW ;
MIHAILOVIC, D ;
HEEGER, AJ ;
EDDY, MM ;
OLSON, WL ;
SMITH, EJ .
SOLID STATE COMMUNICATIONS, 1990, 76 (05) :651-654
[7]   OBSERVATION OF FAST NONBOLOMETRIC OPTICAL-RESPONSE OF NONGRANULAR HIGH-TC Y1BA2CU3O7-X SUPERCONDUCTING THIN-FILMS [J].
FRENKEL, A ;
SAIFI, MA ;
VENKATESAN, T ;
LIN, CL ;
WU, XD ;
INAM, A .
APPLIED PHYSICS LETTERS, 1989, 54 (16) :1594-1596
[8]   ELECTRON-TUNNELING INTO THIN-FILMS OF Y1BA2CU3O7 [J].
GEERK, J ;
XI, XX ;
LINKER, G .
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1988, 73 (03) :329-336
[9]   THERMAL-DIFFUSIVITY OF SUPERCONDUCTING YBA2CU3O7-X [J].
GOMES, L ;
VIEIRA, MMF ;
BALDOCHI, SL ;
LIMA, NB ;
NOVAK, MA ;
VIEIRA, ND ;
MORATO, SP ;
BRAGA, AJP ;
CESAR, CL ;
PENNA, AFS ;
MENDES, J .
JOURNAL OF APPLIED PHYSICS, 1988, 63 (10) :5044-5047
[10]   NONTHERMAL OPTICAL-RESPONSE OF Y-BA-CU-O THIN-FILMS [J].
KWOK, HS ;
ZHENG, JP ;
YING, QY ;
RAO, R .
APPLIED PHYSICS LETTERS, 1989, 54 (24) :2473-2475