6533b862fe1ef96bd12c6b5d
RESEARCH PRODUCT
Magnetic quantum criticality in quasi-one-dimensional Heisenberg antiferromagnet Cu (C4H4N2)( NO 3)2
Vladimir A. StephanovichE. V. KirichenkoKonstantin G. PopovS. A. ArtamonovVasily R. ShaginyanVasily R. Shaginyansubject
Condensed Matter::Quantum GasesPhysicsQuantum phase transitionCondensed matter physicsMagnonGeneral Physics and Astronomy02 engineering and technologyFermion021001 nanoscience & nanotechnology01 natural sciencesMagnetizationEffective mass (solid-state physics)Quantum mechanicsQuantum critical point0103 physical sciencesCondensed Matter::Strongly Correlated ElectronsStrongly correlated material010306 general physics0210 nano-technologyBosondescription
We analyze exciting recent measurements [Phys. Rev. Lett. 114 (2015) 037202] of the magnetization, differential susceptibility and specific heat on one dimensional Heisenberg antiferromagnet Cu(C4H4N2)(NO3)2 (CuPzN) subjected to strong magnetic fields. Using the mapping between magnons (bosons) in CuPzN and fermions, we demonstrate that magnetic field tunes the insulator towards quantum critical point related to so-called fermion condensation quantum phase transition (FCQPT) at which the resulting fermion effective mass diverges kinematically. We show that the FCQPT concept permits to reveal the scaling behavior of thermodynamic characteristics, describe the experimental results quantitatively, and derive for the first time the (temperature—magnetic field) phase diagram, that contains Landau-Fermi-liquid, crossover and non-Fermi liquid parts, thus resembling that of heavy-fermion compounds.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-03-31 | Annalen der Physik |