EVIDENCE OF UPPER-CRITICAL-FIELD ENHANCEMENT IN K3C60 POWDERS

被引：48

作者：

BOEBINGER, GS ^{[1
]}

PALSTRA, TTM ^{[1
]}

PASSNER, A ^{[1
]}

ROSSEINSKY, MJ ^{[1
]}

MURPHY, DW ^{[1
]}

MAZIN, II ^{[1
]}

机构：

[1] MAX PLANCK INST FESTKORPERFORSCH, W-7000 STUTTGART 80, GERMANY

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.46.5876

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

ac susceptibility measurements of superconducting K3C60 powders in magnetic fields to 30 T yield a roughly linear H(c2)(T) curve extending up to the highest experimental fields. Samples prepared by two different methods give -dH(c2)/dT = 2.14+/-0.08 T/K, with T(c) = 18.7 K. The observed H(c2) at low temperatures exceeds the H(c2)(T) curve from the standard theory by Werthamer-Helfand-Hohenberg. We discuss the role of flux motion and evidence for enhancement of H(c2) by intrinsic mechanisms such as strong coupling, Fermi surface anisotropy, and/or granularity of the samples.

引用

页码：5876 / 5879

页数：4

共 30 条

[1] [Anonymous], UNPUB
[2] PROPERTIES OF BOSON-EXCHANGE SUPERCONDUCTORS
CARBOTTE, JP
[J]. REVIEWS OF MODERN PHYSICS, 1990, 62 (04) : 1027 - 1157
[3] ELECTRONIC CORRELATION-EFFECTS AND SUPERCONDUCTIVITY IN DOPED FULLERENES
CHAKRAVARTY, S
GELFAND, MP
KIVELSON, S
[J]. SCIENCE, 1991, 254 (5034) : 970 - 974
[4] BEHAVIOR OF DIRTY SUPERCONDUCTORS IN HIGH MAGNETIC FIELDS
DEGENNES, PG
[J]. PHYSIK DER KONDENSITERTEN MATERIE, 1964, 3 (02): : 79 - +
[5] DOLGOV OV, IN PRESS SOLID STATE
[6] RAMAN STUDIES OF ALKALI-METAL DOPED AXC60 FILMS (A = NA, K, RB, AND CS, X = 0, 3, AND 6)
DUCLOS, SJ
HADDON, RC
GLARUM, S
HEBARD, AF
LYONS, KB
[J]. SCIENCE, 1991, 254 (5038) : 1625 - 1627
[7] THEORETICAL FERMI-SURFACE PROPERTIES AND SUPERCONDUCTING PARAMETERS FOR K3C60
ERWIN, SC
PICKETT, WE
[J]. SCIENCE, 1991, 254 (5033) : 842 - 845
[8] ORIENTATIONAL DISORDER AND ELECTRONIC STATES IN C-60 AND A3C60, WHERE A IS AN ALKALI-METAL
GELFAND, MP
LU, JP
[J]. PHYSICAL REVIEW LETTERS, 1992, 68 (07) : 1050 - 1053
[9] MICROWAVE STUDY OF SUPERCONDUCTIVITY IN ALKALI-METAL-DOPED C-60 FILMS
GLARUM, SH
DUCLOS, SJ
HADDON, RC
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (06) : 1996 - 2001
[10] GUNNARSSON O, UNPUB

← 1 2 3 →