Disappearance of antiferromagnetic spin excitations in overdoped La $_{2-x}$ Sr $_{x}$ CuO $_{4}$

Wakimoto, Shuichi ; Yamada, Kazuyoshi*; Tranquada, J. M.*; Frost, C. D.*; Birgeneau, R. J.*; Zhang, H.*

Magnetic excitations for energies up to meV are studied for over-doped La $_{2-x}$ Sr $_{x}$ CuO $_{4}$ with and , using time-of-flight neutron spectroscopy. Comparison of spectra integrated over the width of an antiferromagnetic Brillouin zone demonstrates that the magnetic scattering at intermediate energies, meV, progressively decreases with over-doping. This strongly suggests that the magnetism is not related to Fermi surface nesting, but rather is associated with a decreasing volume fraction of (probably fluctuating) antiferromagnetic bubbles.

Language	:	English
Journal	:	Physical Review Letters
Volume	:	98
Number	:	24
Pages	:	p.247003_1 - 247003_4
Publication Year/Month	:	2007/06
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Paper URL	:	https://doi.org/10.1103/PhysRevLett.98.247003
DOI for research data	:
Keywords	:	no keyword
Research Facility	:	JRR-3M(研究炉3)
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Registration No. : AA20070213
JAEA Abstracts No. : 35001377
Paper Submission No. : 2968

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Disappearance of antiferromagnetic spin excitations in overdoped LaSrCuO

Disappearance of antiferromagnetic spin excitations in overdoped La $_{2-x}$ Sr $_{x}$ CuO $_{4}$