Similarly, in the two-dimensional periodic Anderson model,
spin liquid behavior supplants magnetic order as the hopping t(pd)
between localized and conduction bands is increased.[3]
One can characterize this behavior either through the spin-spin
correlations directly, or, alternately, through calculation of the
charge and spin gaps. One finds that a charge gap is present at
all t(pd), but that a spin gap begins to develop
only past a critical value of t(pd). We have computed this critical
value as a function of the on site repulsion U on the f electron
sites, allowing us to map out the magnetic phase diagram of the
periodic Anderson model at half-filling.
Magnetic moment formation and Kondo screening is also important in
the Cerium Volume collapse transition.
Finally, magnetic fields can be used to tune across the metal-insulator
phase transition.
Relevant Publications:
Relevant Publications:
[51.]
R.T. Scalettar, J.W. Cannon, D.J. Scalapino,
and R.L. Sugar,
"Magnetic and Pairing Correlations in Coupled Hubbard Planes,"
Phys. Rev. B50, 13419 (1994).
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[53.]
M. Vekic, J.W. Cannon, D.J. Scalapino, R.T. Scalettar,
and R.L. Sugar,
"Competition Between Antiferromagnetic Order and Spin Liquid Behavior
in the Two-Dimensional Periodic Anderson Model at Half-Filling,"
Phys. Rev. Lett. 74, 2367 (1995).
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[55.]
R.T. Scalettar,
"Magnetism and Spin Liquid Behavior in a Two Layer Hubbard Model,"
J. of Low Temp. Phys. 99, 499 (1995).
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[58.]
D.J. Scalapino, R.L. Sugar, R. Noack, S.R. White,
R.T. Scalettar, M. Vekic, and J.W. Cannon,
"Insulating States of Correlated Electrons,"
J. of Low Temp. Phys. 99, 487 (1995).
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[66.]
M. Ulmke, R.T. Scalettar, A. Nazarenko, and E. Dagotto,
"One particle spectral weight of the three dimensional single band
Hubbard model."
Phys. Rev. B54, 16523 (1996).
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[71.]
J. Kuei and R.T. Scalettar,
"Ferromagnetism in an Orbitally Degenerate Hubbard Model",
Phys. Rev. B55, 14968 (1997).
|
|
[87.]
Carey Huscroft, A.K. McMahan, and R.T. Scalettar,
"Magnetic and Thermodynamic Properties of the Three-Dimensional
Periodic Anderson Hamiltonian",
Phys. Rev. Lett. 82, 2342 (1999).
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[91.]
K. Held, C. Huscroft, R.T. Scalettar, and A.K. McMahan,
"Similarities between the Hubbard and Periodic
Anderson Models at Finite Temperatures",
Phys. Rev. Lett. 85, 373 (2000).
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[112.]
K. Held, A.K. McMahan, and R.T. Scalettar,
"The Cerium Volume Collapse: Results from the merger of
dynamical mean-field theory and local density approximation,''
Phys. Rev. Lett. 87, 276404 (2001).
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[120.]
A. K. McMahan, K. Held, and R. T. Scalettar,
"Thermodynamic and spectral properties of compressed Ce
calculated by the merger of the local density approximation and
dynamical mean field theory,"
Phys. Rev. B67, 075108 (2003).
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[125.]
P.J.H. Denteneer and R.T. Scalettar,
"Interacting electrons in a two-dimensional disordered environment:
Effect of a Zeeman magnetic field,''
Phys. Rev. Lett. 90, 246401 (2003).
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[178.] K. Bouadim, G.G. Batrouni, F. H\'ebert,
and R.T. Scalettar,
"d-wave Superconductivity in a bilayer Hubbard Model,"
Phys. Rev. B77, 144527 (2008).
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[186.]
K. Bouadim, G.G. Batrouni, and R.T. Scalettar,
"Determinant Quantum Monte Carlo Study of the
Orbitally Selective Mott Transition,"
Phys. Rev. Lett. 102, 226402 (2009).
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