Small fermi surface pockets in underdoped high temperature superconductors:: Observation of Shubnikov-de Haas oscillations in YBa2Cu4O8

被引：224

作者：

Bangura, A. F. ^{[1
]}

Fletcher, J. D. ^{[1
]}

Carrington, A. ^{[1
]}

Levallois, J. ^{[2
]}

Nardone, M. ^{[2
]}

Vignolle, B. ^{[2
]}

Heard, P. J. ^{[1
]}

Doiron-Leyraud, N. ^{[3
]}

LeBoeuf, D. ^{[3
]}

Taillefer, L. ^{[3
]}

Adachi, S. ^{[4
]}

Proust, C. ^{[2
]}

Hussey, N. E. ^{[1
]}

机构：

[1] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

[2] UMR CNRS UPS INSA, Lab Natl Champs Magnet Pulses, F-5147 Toulouse, France

[3] Univ Sherbrooke, Dept Phys & RQMP, Sherbrooke, PQ J1K 2R1, Canada

[4] Int Superconduct Technol Ctr, Superconduct Res Lab, Tokyo 135, Japan

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 04期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.100.047004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the observation of Shubnikov-de Haas oscillations in the underdoped cuprate superconductor YBa2Cu4O8 (Y124). For fields aligned along the c axis, the frequency of the oscillations is 660 +/- 30 T, which corresponds to similar to 2.4% of the total area of the first Brillouin zone. The effective mass of the quasiparticles on this orbit is measured to be 2.7 +/- 0.3 times the free electron mass. Both the frequency and mass are comparable to those recently observed for ortho-II YBa2Cu3O6.5 (Y123-II). We show that although small Fermi surface pockets may be expected from band-structure calculations in Y123-II, no such pockets are predicted for Y124. Our results therefore imply that these small pockets are a generic feature of the copper oxide plane in underdoped cuprates.

引用

页数：4

共 31 条

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