Quantum phase transition in a two-dimensional Kondo-Heisenberg model: a Schwinger-boson large-N approach

Abstract

Strange metal behavior arises in heavy fermion metals close to antiferromagnetic transitions. An increasing amount of experiments indicates a link of such behavior to a Kondo breakdown quantum critical point. To shed light on this intriguing problem, we study the 2D Kondo-Heisenberg model using a dynamical large-N multichannel Schwinger boson approach. We identify and characterize the quantum phase transition from an antiferromagnetically ordered ground state to a Kondo-dominated paramagnetic state, and attribute a jump in certain phase shift to Kondo breakdown. In addition, we calculate transport and thermodynamic quantities and discuss them in the context of the experimental observations in quantum critical heavy fermion systems.

arXiv comment5 pages, 4 figures. Title, abstract, author list, introduction, Fig. 3 revised. Typos corrected

References in corpus (53)

• Comments on the Sachdev-Ye-Kitaev model
• Fermi-liquid instabilities at magnetic quantum phase transitions
• Quantum Criticality in Heavy Fermion Metals
• Locally critical quantum phase transitions in strongly correlated metals
• Heavy-fermion superconductivity in CeCoIn5 at 2.3K
• The break up of heavy electrons at a quantum critical point
• Onset of antiferromagnetism in heavy fermion metals
• Heavy Fermions and Quantum Phase Transitions
• Hall-effect evolution across a heavy-fermion quantum critical point
• Fractionalized Fermi liquids
• Scattering and Pairing in Cuprate Superconductors
• Universal quantum critical dynamics of two-dimensional antiferromagnets
• Quantum Fluctuations of a Nearly Critical Heisenberg Spin Glass
• Two-dimensional fluctuations at the quantum-critical point of CeCu_{6-x}Au_x
• A mechanism for the non-Fermi-liquid behavior in CeCu_{6-x}Au_x
• Fermi-surface collapse and dynamical scaling near a quantum critical point
• Heavy-electron quantum criticality and single-particle spectroscopy
• Direct observation of how the heavy fermion state develops in CeCoIn5
• Heavy-fermion and spin-liquid behavior in a Kondo lattice with magnetic frustration
• Evidence for a Non-Fermi-Liquid Phase in Ge-Substituted YbRh2Si2
• Singular charge fluctuations at a magnetic quantum critical point
• Transition from overscreening to underscreening in the multichannel Kondo model: exact solution at large N
• The absence of finite-temperature phase transitions in low-dimensional many-body models: a survey and new results
• Quasiparticles beyond the Fermi liquid and heavy fermion criticality
• Locally critical point in an anisotropic Kondo lattice
• Continuous quantum phase transition in a Kondo lattice model
• Quantum critical properties of the Bose-Fermi Kondo Model in a large-N limit
• Sum Rules and Ward Identities in the Kondo Lattice
• Fractionalization and Fermi surface volume in heavy fermion compounds: the case of YbRh${}_2$ Si${}_2$
• Extended Dynamical Mean Field Theory Study of the Periodic Anderson Model
• Model for Ferromagnetic Quantum Critical Point in a 1D Kondo Lattice
• Evolution of the Kondo lattice and non-Fermi liquid excitations in a heavy-fermion metal
• Emergent Charge Fluctuations at the Kondo Breakdown of Heavy Fermions
• Schwinger Boson approach to the fully screened Kondo model
• Kondo destruction and valence fluctuations in an Anderson model
• Zero-Temperature Magnetic Transition in an Easy-Axis Kondo Lattice Model
• Signature of quantum criticality in photoemission spectroscopy at elevated temperature
• Magnetic quantum phase transition in an anisotropic Kondo lattice
• Understanding the Heavy Fermion Phenomenology from Microscopic Model
• Critical Kondo destruction in a pseudogap Anderson model: scaling and relaxational dynamics
• Phase diagram, energy scales and nonlocal correlations in the Anderson lattice model
• Toward a New Microscopic Framework for Kondo Lattice Materials
• Nonlinear Sigma Model Analysis of the AFM Phase Transition of the Kondo Lattice
• Supersymmetric approach to heavy fermion systems
• Quantum phase transitions of antiferromagnets and the cuprate superconductors
• Echo of the Quantum Phase Transition of CeCu${}_{6-x}$Au${}_x$ in XPS: Breakdown of Kondo Screening
• Pathology of Schwinger boson mean field theory for Heisenberg spin models
• Quantum replica approach to the under-screened Kondo model
• Conserving many body approach to the fully screened, infinite U Anderson model
• Fermi liquid identities for the Infinite U Anderson Model
• Topological defects of Néel order and Kondo singlet formation for Kondo-Heisenberg model on a honeycomb lattice
• Strange metal state near a heavy-fermion quantum critical point
• Strange superconductivity near an antiferromagnetic heavy fermion quantum critical point

Cited by in corpus (19)

• Nonlocal Kondo effect and quantum critical phase in heavy fermion metals
• Emergent Spinon Dispersion and Symmetry Breaking in Two-Channel Kondo Lattices
• A unified theory of ferromagnetic quantum phase transitions in heavy fermion metals
• Emergent moments in a Hund's impurity
• ${\mathbb{Z}}_2$ metallic spin liquid on a frustrated Kondo lattice
• Pair-density-wave and $s\pm \mathrm{i}d$ superconductivity in a strongly coupled, lightly doped Kondo insulator
• Highly asymmetric superconducting dome and strange metallicity in La${}_3$Ni${}_2$O${}_7$
• Spin current Kondo effect in frustrated Kondo systems
• Schwinger boson approach for the dynamical mean-field theory of the Kondo lattice
• Interplay of charge and spin fluctuations in a Hund's coupled impurity
• An emerging global picture of heavy fermion physics
• Nonlocal Kondo effect and two-fluid picture revealed in an exactly solvable model
• Dynamic charge Kondo effect and a slave fermion approach to the Mott transition
• Kondo breakdown transitions and phase-separation tendencies in valence-fluctuating heavy-fermion materials
• Quantum Fisher information in a strange metal
• Dynamic-RKKY induced time-reversal symmetry breaking and chiral spin liquids
• Towards Entanglement Entropy of Random Large-N Theories
• Quasi-two-dimensional spin helix and magnon-induced singularity in twisted bilayer graphene
• Emergent Chiral Metal near a Kondo Breakdown Quantum Phase Transition