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High-field magnetotransport in microstructures of the frustrated antiferromagnet Yb<sub>2</sub>Pt<sub>2</sub>Pb [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2017.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
3 pages : digital, PDF file
Additional Creators
Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Frustrated quantum magnets exhibit a rich variety of non-trivial quantum ground states due to their remnant entropy at zero temperature. Most studied materials are insulators, with magnetic coupling of localized spins mediated by exchange interactions. Yb2Pt2Pb (YPP) is a rare example of a metallic frustrated quantum magnet, where Yb3+ J=7/2 moments are arranged in dimers forming a Shastry-Sutherland lattice. In addition, the itinerant charge carriers of the metal provide gapless excitations able to mediate magnetic interactions (RKKY) as well as hybridize with the 4f-states, which has been proposed to lead to a novel charge-orbital separation. YPP orders antiferromagnetically (AFM) below TN = 2.1 K, and strong g-factor anisotropy confines the spins into the ab planes. Accordingly, fields aligned parallel to the planes suppress the AFM order already below 4 T, while fields of up to 65 T along the c direction do not lead to saturation in the magnetization and step-like features even at B ~ 25 T were observed [4]. Here we probe the electronic structure of YPP by quantum oscillation and conductivity measurements in high fields, which tune the energy balance of the 4f states and thus the degree of charge-orbital separation.
Report Numbers
E 1.99:la--ur-17-21890
la--ur-17-21890
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Note
Published through SciTech Connect.
03/06/2017.
"la--ur-17-21890"
T. Helm; P. J. W. Moll; Mun Keat Chan; Brad Ramshaw; Fedor Fedorovich Balakirev.
Funding Information
AC52-06NA25396
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