The Scientist has asked a group of expert. to periodically comment upon recent articles that they have found noteworthy. Their selectIons, presented here in every issue, are neither endorsements of content nor the result of systematic searching. Rather they are personal choices of articles they believe the scientific community as a whole may also find i.nteresting. Reprints of any articles cited here may be ordered through The Genuine Article, 8501 Market St., Philadelphia, Pa. 19004.


IBM Research Division
Thomas J. Watson Research Center
Yorktown Heights, N.Y.

"The search for the mechanism that drives high-temperature superconductivity is moving on. A recent article discusses novel ideas about spin ordering leading to holes trapped in “bags” and hole pairing by sharing a bag.

J.R. Schrieffer, X.-G. Wen, S.-C. Zhang, “Spin-bag mechanism of high-temperature superconductivity,” Physical Review Letters, 60,944-7,1988.

"By probing the electrical and magnetic properties of grain boundaries...

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