Weak Ferromagnetism Accompanying Loop current order in Underdoped Cuprates

Details Weak Ferromagnetism Accompanying Loop current order in Underdoped Cuprates Weak Ferromagnetism Accompanying Loop current order in Underdoped Cuprates

2008-02-22

arxiv.org/abs/0802.3258v2

Physical Review B 78, 094421 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages

Scientific paper

10.1103/PhysRevB.78.094421

We discuss the necessary symmetry conditions and the different ways in which they can be physically realized for the occurrence of ferromagnetism accompanying the loop current orbital magnetic order observed by polarized neutron-diffraction experiments or indeed any other conceivable principal order in the under-doped phase of cuprates. We contrast the Kerr effect experiments in single crystals observing ferromagnetism with the direct magnetization measurements in large powder samples, which do not observe it. We also suggest experiments to resolve the differences among the experiments, all of which we believe to be correct.

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