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23 papers · 1 filter
Quantum critical behavior of diluted quasi-one-dimensional Ising chains
Logan Sowadski, Thomas Vojta
CoNbO is a unique magnetic material. It features bulk three-dimensional magnetic order at low temperatures, but its quantum critical behavior in a magnetic field is well de…
Magnetic field-tuned magnetic order and metamagnetic criticality in non-stoichiometric CeAuBi
Halyna Hodovanets, Hyunsoo Kim, Tristin Metz +9
We present a detailed study of magnetization, resistivity, heat capacity, and X-ray and neutron powder diffraction measurements performed on single crystals of non-stoichiometric C…
Random-strain-induced correlations in materials with intertwined nematic and magnetic orders
W. Joe Meese, Thomas Vojta, Rafael M. Fernandes
Electronic nematicity is rarely observed as an isolated instability of a correlated electron system. Instead, in iron pnictides and in certain cuprates and heavy-fermion materials,…
Signatures of a Quantum Griffiths Phase close to an Electronic Nematic Quantum Phase Transition
Pascal Reiss, David Graf, Amir A. Haghighirad +2
In the vicinity of a quantum critical point, quenched disorder can lead to a quantum Griffiths phase, accompanied by an exotic power-law scaling with a continuously varying dynamic…
Quantum percolation phase transition and magneto-electric dipole glass in hexagonal ferrites
S. E. Rowley, T. Vojta, A. T. Jones +7
Hexagonal ferrites do not only have enormous commercial impact (£2 billion/year in sales) due to applications that include ultra-high density memories, credit card stripes, magneti…
Evidence for magnetic clusters in NiV close to the quantum critical concentration
R. Wang, S. Ubaid-Kassis, A. Schroeder +7
The d-metal alloy NiV undergoes a quantum phase transition from a ferromagnetic ground state to a paramagnetic ground state as the vanadium concentration is incre…