Quantum phases of the Shastry-Sutherland Kondo lattice: implications for the global phase diagram of heavy-fermion metals.

  title={Quantum phases of the Shastry-Sutherland Kondo lattice: implications for the global phase diagram of heavy-fermion metals.},
  author={Jedediah H. Pixley and R Yu and Qimiao Si},
  journal={Physical review letters},
  volume={113 17},
Considerable recent theoretical and experimental effort has been devoted to the study of quantum criticality and novel phases of antiferromagnetic heavy-fermion metals. In particular, quantum phase transitions have been discovered in heavy-fermion compounds with geometrical frustration. These developments have motivated us to study the competition between the Ruderman-Kittel-Kasuya-Yosida and Kondo interactions on the Shastry-Sutherland lattice. We determine the zero-temperature phase diagram… 
Quantum-critical phase from frustrated magnetism in a strongly correlated metal
Strange-metal phenomena often develop at the border of antiferromagnetic order in strongly correlated metals1. Previous work established that they can originate from the fluctuations anchored by the
Global phase diagram and momentum distribution of single-particle excitations in Kondo insulators
Kondo insulators are emerging as a simplified setting to study both magnetic and insulator-to-metal quantum phase transitions. Here, we study the half-filled Anderson lattice model defined on a
Phase diagram of the Kondo-Heisenberg model on honeycomb lattice with geometrical frustration
We calculated the phase diagram of the Kondo-Heisenberg model on a two-dimensional honeycomb lattice with both nearest-neighbor and next-nearest-neighbor antiferromagnetic spin exchanges, to
Phase diagram and dynamics of the SU(N) symmetric Kondo lattice model
In heavy-fermion systems, the competition between the local Kondo physics and intersite magnetic fluctuations results in unconventional quantum critical phenomena which are frequently addressed
Mechanism of a strange metal state near a heavy-fermion quantum critical point
Recent experiments on quantum criticality in the Ge-substituted heavy-electron material YbRh2Si2 under magnetic field have revealed a possible non-Fermi liquid (NFL) strange metal (SM) state over a
Novel Magnetic Orders and Ice Phases in Frustrated Kondo-Lattice Models
We review recent theoretical progress in our understanding of electron-driven novel magnetic phases on frustrated lattices. Our specific focus is on Kondo-lattice or double-exchange models assuming
Heavy-Fermion Valence-Bond Liquids in Ultracold Atoms: Cooperation of the Kondo Effect and Geometric Frustration.
A geometrically frustrated periodic Anderson model is considered and how orbital fluctuations lead to a Kondo-screened phase in the limit of extreme strong frustration when only local singlet states participate in the low-energy physics is demonstrated.
First-order transition between the plaquette valence bond solid and antiferromagnetic phases of the Shastry-Sutherland model
We study the ground state phase diagram of the Shastry-Sutherland model by using the variational optimization of the infinite tensor network states, and find a weakly first-order transition between
Quantum Monte Carlo Simulation of Frustrated Kondo Lattice Models.
It is shown that one can formulate a negative-sign-free auxiliary field quantum Monte Carlo algorithm that allows Kondo coupling of fermions with the spins and a partial Kondo screened state where spins are selectively screened so as to alleviate frustration.
Skyrmion defects and competing singlet orders in a half-filled antiferromagnetic Kondo-Heisenberg model on the honeycomb lattice
Due to the interaction between topological defects of an order parameter and underlying fermions, the defects can possess induced fermion numbers, leading to several exotic phenomena of fundamental


Frustration and the Kondo Effect in Heavy Fermion Materials
The observation of a separation between the antiferromagnetic phase boundary and the small-large Fermi surface transition in recent experiments has led to the proposal that frustration is an
Global magnetic phase diagram and local quantum criticality in heavy fermion metals
We address the global magnetic phase diagram of Kondo lattice systems. Through the distinct Fermi surface properties of the various phases at zero temperature, we argue that the phase diagram
Quantum criticality and global phase diagram of magnetic heavy fermions
Quantum criticality describes the collective fluctuations of matter undergoing a second-order phase transition at zero temperature. It is being discussed in a number of strongly correlated electron
Destruction of the Kondo effect in the cubic heavy-fermion compound Ce3Pd20Si6.
A cubic heavy-fermion material is identified as exhibiting a field-induced quantum phase transition, and it is shown how the material can be used to explore one extreme of the dimensionality axis, leading to a materials-based global phase diagram.
Approaching quantum criticality in a partially geometrically frustrated heavy-fermion metal
Quantum phase transitions have captured the interest of a large community in condensed-matter and atom physics research. The common feature of these very different material classes lies in the fact
Heavy Fermions and Quantum Phase Transitions
Recent years have seen the identification of continuous quantum phase transitions, or quantum critical points, in a host of antiferromagnetic heavy-fermion compounds and quantum criticality has provided fresh insights into the electronic, magnetic, and superconducting properties of the heavy-FERmion metals.
Locally critical quantum phase transitions in strongly correlated metals
The theoretical finding of a locally critical quantum phase transition in a model of heavy fermions is reported, and local criticality is proposed to be a phenomenon of general relevance to strongly correlated metals.
Frustration in the Kondo lattice model: Local versus extended singlet phases
We present a theoretical study of the frustrated Kondo lattice model on a Shastry-Sutherland-type lattice. Using a mean-field decoupling on both the Kondo and intersite exchange interactions, we
Quantum critical Kondo destruction in the Bose-Fermi Kondo model with a local transverse field
Recent studies of the global phase diagram of quantum-critical heavy-fermion metals prompt consideration of the interplay between the Kondo interactions and quantum fluctuations of the local moments
Onset of antiferromagnetism in heavy-fermion metals
Evidence is found for an atomically local contribution to the magnetic correlations which develops at the critical gold concentration, corresponding to a magnetic ordering temperature of zero, which implies that a Fermi-liquid-destroying spin-localizing transition, unanticipated from the spin density wave description, coincides with the antiferromagnetic quantum critical point.