Search for orbital moments in underdoped cuprate metals

S.-H. Lee; C. F. Majkrzak; S. K. Sinha; C. Stassis; H. Kawano; G. H. Lander; P. J. Brown; H. F. Fong; S-W. Cheong; H. Matsushita; K. Yamada; Y. Endoh

doi:10.1103/PhysRevB.60.10405

Search for orbital moments in underdoped cuprate metals

S.-H. Lee, C. F. Majkrzak, S. K. Sinha, C. Stassis, H. Kawano, G. H. Lander, P. J. Brown, H. F. Fong, S-W. Cheong, H. Matsushita, K. Yamada, Y. Endoh

DOI 10.1103/PhysRevB.60.10405 · Physical Review B

T1

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Abstract

Polarized neutron-diffraction experiments have been performed in search of the orbital magnetic moments recently predicted in a theory for the cuprate metals. Both La2−xSrxCuO4 [LSCO(x)] and YBa2Cu3O6+x [YBCO(x)] compounds were investigated. No definitive evidence for the existence of such a three-dimensionally ordered moment was found in any of these samples within experimental uncertainty, which was as low as 0.01μB. We have also investigated the possibility that a magnetic rod exists parallel to the c axis in the case of two- or quasi-two-dimensional ordering in the (a,b) plane and have set an upper limit for the total moment to be 0.1μB in LSCO (x=0.1).

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O6+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown