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ESI Special Topic of:
"Superfluids," Published June 2005

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Superfluids

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ESI Special Topics, June 2005
Citing URL - http://www.esi-topics.com/superfluids/interviews/
paper2.html


#2 Paper of the Top 20 Papers in Superfluids

Title: IMPORTANCE OF PHASE FLUCTUATIONS IN SUPERCONDUCTORS WITH SMALL SUPERFLUID DENSITY
Authors: EMERY VJ, KIVELSON SA
Source: NATURE 374 (6521): 434-437 MAR 30 1995
Document Type: Article Language: English
Cited References: 31  Times Cited: 661
Abstract: THE superconducting state of a metal is characterized by a complex order parameter with an amplitude and a phase. In the BCS-Eliashberg mean-field theory(1), which is a very good approximation for conventional metals, the phase of the order parameter is unimportant for determining the value of the transition temperature T-c and the change of many physical properties brought about by the transition. Here we argue that superconductors with low superconducting carrier density (such as the organic and high-T-c oxide superconductors) are characterized by a relatively small phase 'stiffness' and poor screening, both of which imply a significantly larger role for phase fluctuations. As a consequence, in these materials the transition to the superconducting state may not display typical mean-field behaviour, and phase fluctuations, both classical and quantum, may have a significant influence on low-temperature properties, For some quasi-two-dimensional materials, notably underdoped high-temperature superconductors, the onset of long-range phase order controls the gross value of T-c as well as its systematic variation from one material to another.
Keywords Plus: HEAVY-FERMION SUPERCONDUCTORS; LONDON PENETRATION DEPTH; MAGNETIC-FIELD; NORMAL STATE; TEMPERATURE; TL2BA2CUO6+DELTA; CUPRATE; UBE13; TC
Addresses: EMERY VJ (reprint author), BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA
UNIV CALIF LOS ANGELES, DEPT PHYS, LOS ANGELES, CA 90095 USA
Publisher: MACMILLAN MAGAZINES LTD, 4 LITTLE ESSEX STREET, LONDON, ENGLAND WC2R 3LF Subject Category: MULTIDISCIPLINARY SCIENCES
IDS Number: QP899 ISSN: 0028-0836

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ESI Special Topics, June 2005
Citing URL - http://www.esi-topics.com/superfluids/interviews/
paper2.html

ESI Special Topic of:
"Superfluids," Published June 2005

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