The search for circular dichroism in high Tc superconductors (abstract)

K. B. Lyons; J. Kwo; J. F. Dillon; G. P. Espinosa; M. Mcglashan Powell; A. P. Ramirez; L. F. Schneemeyer

doi:10.1063/1.348075

The search for circular dichroism in high T_c superconductors (abstract)

K. B. Lyons, J. Kwo, J. F. Dillon, G. P. Espinosa, M. Mcglashan Powell, A. P. Ramirez, L. F. Schneemeyer

Chemistry and Biochemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Stimulated by recent predictions of broken time reversal symmetry in cuprate superconductors, we have carried out a study of the polar Kerr ellipticity (the ellipticity of normally reflected light with the incident beam linearly polarized) for various cuprate materials, both superconducting and nonsuperconducting. The technique used employs a rotating half wave retardation plate in order to discriminate against linear polarization effects. The results reveal a signature of a nonzero polar Kerr ellipticity which appears on cooling near 200 K in a variety of superconducting materials, and which is not observed in the corresponding insulating compounds. In this talk, in addition to summarizing these results, we plan to discuss the measurement technique itself in some detail. Measurements on both thin films and bulk samples will be discussed, together with a variety of tests on unrelated materials, which serve to eliminate various possible experimental artifacts.

Original language	English
Pages (from-to)	5205
Number of pages	1
Journal	Journal of Applied Physics
Volume	69
Issue number	8
DOIs	https://doi.org/10.1063/1.348075
State	Published - 15 Apr 1991

Access to Document

10.1063/1.348075

Cite this

@article{04ed60ef68ad44bf86c2245e9304e27a,

title = "The search for circular dichroism in high Tc superconductors (abstract)",

abstract = "Stimulated by recent predictions of broken time reversal symmetry in cuprate superconductors, we have carried out a study of the polar Kerr ellipticity (the ellipticity of normally reflected light with the incident beam linearly polarized) for various cuprate materials, both superconducting and nonsuperconducting. The technique used employs a rotating half wave retardation plate in order to discriminate against linear polarization effects. The results reveal a signature of a nonzero polar Kerr ellipticity which appears on cooling near 200 K in a variety of superconducting materials, and which is not observed in the corresponding insulating compounds. In this talk, in addition to summarizing these results, we plan to discuss the measurement technique itself in some detail. Measurements on both thin films and bulk samples will be discussed, together with a variety of tests on unrelated materials, which serve to eliminate various possible experimental artifacts.",

author = "Lyons, {K. B.} and J. Kwo and Dillon, {J. F.} and Espinosa, {G. P.} and {Mcglashan Powell}, M. and Ramirez, {A. P.} and Schneemeyer, {L. F.}",

year = "1991",

month = apr,

day = "15",

doi = "10.1063/1.348075",

language = "English",

volume = "69",

pages = "5205",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "8",

}

TY - JOUR

T1 - The search for circular dichroism in high Tc superconductors (abstract)

AU - Lyons, K. B.

AU - Kwo, J.

AU - Dillon, J. F.

AU - Espinosa, G. P.

AU - Mcglashan Powell, M.

AU - Ramirez, A. P.

AU - Schneemeyer, L. F.

PY - 1991/4/15

Y1 - 1991/4/15

N2 - Stimulated by recent predictions of broken time reversal symmetry in cuprate superconductors, we have carried out a study of the polar Kerr ellipticity (the ellipticity of normally reflected light with the incident beam linearly polarized) for various cuprate materials, both superconducting and nonsuperconducting. The technique used employs a rotating half wave retardation plate in order to discriminate against linear polarization effects. The results reveal a signature of a nonzero polar Kerr ellipticity which appears on cooling near 200 K in a variety of superconducting materials, and which is not observed in the corresponding insulating compounds. In this talk, in addition to summarizing these results, we plan to discuss the measurement technique itself in some detail. Measurements on both thin films and bulk samples will be discussed, together with a variety of tests on unrelated materials, which serve to eliminate various possible experimental artifacts.

AB - Stimulated by recent predictions of broken time reversal symmetry in cuprate superconductors, we have carried out a study of the polar Kerr ellipticity (the ellipticity of normally reflected light with the incident beam linearly polarized) for various cuprate materials, both superconducting and nonsuperconducting. The technique used employs a rotating half wave retardation plate in order to discriminate against linear polarization effects. The results reveal a signature of a nonzero polar Kerr ellipticity which appears on cooling near 200 K in a variety of superconducting materials, and which is not observed in the corresponding insulating compounds. In this talk, in addition to summarizing these results, we plan to discuss the measurement technique itself in some detail. Measurements on both thin films and bulk samples will be discussed, together with a variety of tests on unrelated materials, which serve to eliminate various possible experimental artifacts.

UR - http://www.scopus.com/inward/record.url?scp=84953667554&partnerID=8YFLogxK

U2 - 10.1063/1.348075

DO - 10.1063/1.348075

M3 - Article

AN - SCOPUS:84953667554

SN - 0021-8979

VL - 69

SP - 5205

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 8

ER -

The search for circular dichroism in high T_c superconductors (abstract)

Abstract

Access to Document

Other files and links

Fingerprint

Cite this