2019
DOI: 10.1073/pnas.1818910116
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Divergence of the quadrupole-strain susceptibility of the electronic nematic system YbRu 2 Ge 2

Abstract: Ferroquadrupole order associated with local 4f atomic orbitals of rare-earth ions is a realization of electronic nematic order. However, there are relatively few examples of intermetallic materials which exhibit continuous ferroquadrupole phase transitions, motivating the search for additional materials that fall into this category. Furthermore, it is not clear a priori whether experimental approaches based on transport measurements which have been successfully used to probe the nematic susceptibility in mater… Show more

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Cited by 58 publications
(53 citation statements)
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“…Single crystals of YbRu 2 Ge 2 were grown by flux method; details of the growth can be found in Ref [14]. Two samples were used in this study: one was cleaved in ambient condition to expose its xy crystallographic plane, the other had a clean as-grown xz crystallographic plane.…”
Section: Methodsmentioning
confidence: 99%
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“…Single crystals of YbRu 2 Ge 2 were grown by flux method; details of the growth can be found in Ref [14]. Two samples were used in this study: one was cleaved in ambient condition to expose its xy crystallographic plane, the other had a clean as-grown xz crystallographic plane.…”
Section: Methodsmentioning
confidence: 99%
“…The true B 1g -symmetry FQ order develops at T Q = 10 K [14], about 10 K above the Weiss temperature T B1g W . Because YRu 2 Ge 2 , the non-magnetic analog of the same structure, has no orthorhombic transition [14,31], the quadrupolar fluctuations of YbRu 2 Ge 2 lattice themselves should have little tendency towards a structural instability.…”
Section: B Quadrupolar Fluctuationsmentioning
confidence: 96%
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“…This is because the standard picture of the screened dipolar local moments by conduction electrons may not be applicable to the multipolar cases. In fact, local moments in many heavy fermion systems carry multipolar moments because of strong spin-orbit coupling and crystal electric field effects [14][15][16][17][18][19][20][21][22][23][24]. The fate of such an unusual Kondo effect would also have ramifications in multipolar ordering induced by the same coupling, often dubbed "hidden order" due to the difficulty of detecting it with conventional experimental probes [25,26].…”
Section: Introductionmentioning
confidence: 99%