Bulletin of the American Physical Society
APS March Meeting 2021
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session R39: Exotic Magnetic Orders and Excitations
8:00 AM–11:00 AM,
Thursday, March 18, 2021
Sponsoring Units: GMAG DMP
Chair: Oleg Starykh, University of Utah
Abstract: R39.00010 : A zoo of presaturation phases in novel quantum ferro-antiferromagnets.
10:12 AM–10:48 AM
Simon L. Bettler
Vivek Kumar Bhartiya
Daniel Flavian Blasco
Strong frustration of FM and AFM interactions is uncommon in materials. Among the most interesting candidates are the layered vanady phosphates ABVO(PO4)2 (proximate J1-J2 square lattices) and linear-chain molybdates (Rb, Cs)2Cu2Mo3O12 (J1-J2 spin chains). Both families are known for quite some time, but their investigation were hampered by a lack of single crystals. In recent breakthoughs, large crystals of BaCdVO(PO4)2 , Pb2VO(PO4)2 , SrZnVO(PO4)2 were synthesized. The spin Hamiltonians was determined in neutron spectroscopy experiments  and the behavior in applied fields was studied in detail [3-5]. Indeed, novel presaturation phases were found in each of these materials, but seem to vary considerably between species.
Smaller single crystals of the molybdates are now also available [6,7]. The Cs system shows an entire cascade of field-induced transitions with a very distinctive presaturation phase . The Rb material has a presaturation phase as well. It is more subtle and is only revealed in highly sensitive dielectric experiments.
It is a good moment in time for theorists to step in and help classify the animals in the zoo of new quantum presaturation phases in these compounds.
 H. T. Ueda and T. Momoi, Phys. Rev. B 87, 144417 (2013).
 Bettler et al., Phys. Rev. B 99, 184437(2019).
 Povarov et al., Phys. Rev. B 99 024413 (2019).
 Bhartiya et al., Phys. Rev. Research 1, 033078 (2019).
 Landolt et al., Phys. Rev. B 102, 094414 (2020).
 Hayashida et al., Phys. Rev. B 100, 134427 (2019).
 Flavian et al., Phys. Rev. B 101, 224408 (2020).
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