skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Combined local-density and dynamical mean field theory calculations for the compressed lanthanides Ce, Pr, and Nd

Journal Article · · Physical Review B

This paper reports calculations for compressed Ce (4f{sup 1}), Pr (4f{sup 2}), and Nd (4f{sup 3}) using a combination of the local-density approximation (LDA) and dynamical mean field theory (DMFT), or LDA+DMFT. The 4f moment, spectra, and the total energy among other properties are examined as functions of volume and atomic number for an assumed face-centered cubic (fcc) structure. These materials are seen to be strongly localized at ambient pressure and for compressions up through the experimentally observed fcc phases ({gamma} phase for Ce), in the sense of having fully formed Hund's rules moments and little 4f spectral weight at the Fermi level. Subsequent compression for all three lanthanides brings about significant deviation of the moments from their Hund's rules values, a growing Kondo resonance at the fermi level, an associated softening in the total energy, and quenching of the spin orbit since the Kondo resonance is of mixed spin-orbit character while the lower Hubbard band is predominantly j = 5/2. while the most dramatic changes for Ce occur within the two-phase region of the {gamma}-{alpha} volume collapse transition, as found in earlier work, those for Pr and Nd occur within the volume range of the experimentally observed distorted fcc (dfcc) phase, which is therefore seen here as transitional and not part of the localized trivalent lanthanide sequence. The experimentally observed collapse to the {alpha}-U structure in Pr occurs only on further compression, and no such collapse is found in Nd. These lanthanides start closer to the localized limit for increasing atomic number, and so the theoretical signatures noted above are also offset to smaller volume as well, which is possibly related to the measured systematics of the size of the volume collapse being 15%, 9%, and none for Ce, Pr, and Nd, respectively.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
877905
Report Number(s):
UCRL-JRNL-211043; TRN: US0601669
Journal Information:
Physical Review B, Vol. 72, Issue 11
Country of Publication:
United States
Language:
English

References (68)

High pressure phase transformations in neodymium studied in a diamond anvil cell using diamond-coated rhenium gaskets journal August 1999
New results on Trotter-like approximations journal May 1986
The crystal structure and the equation of state of cerium metal in the pressure range 0–46 Gpa journal December 1985
Elasticity and constitution of the Earth's interior journal June 1952
Interpolative approach for solving the Anderson impurity model journal March 2005
Anomalous normal-state properties of high- T c superconductors: intrinsic properties of strongly correlated electron systems? journal January 1995
Ab initio calculations of quasiparticle band structure in correlated systems: LDA++ approach journal March 1998
High Temperature-High Pressure Structural Studies of Cerium journal January 2002
Deviations from Fermi-Liquid Behavior above T c in 2D Short Coherence Length Superconductors journal July 1995
Physical properties of the rare earth metals journal June 1990
Reexamination of the crystal structure of a high‐pressure phase in praseodymium metal journal December 1982
Atomic volumes of rare-earth metals under pressures to 40 GPa and above journal March 1992
Many-Body Approximation Scheme beyond GW journal May 2004
Orbital polarization in narrow-band systems: Application to volume collapses in light lanthanides journal April 1990
Static high pressure studies on Nd and Sc journal May 1986
Electronic structure of cerium in the self-interaction corrected local spin density approximation journal February 1994
Static high-pressure structural studies on Dy to 119 GPa journal May 2004
Self-interaction corrected, local spin density description of the γ→α transition in Ce journal February 1994
Nature of the 5 f electrons in the actinide series journal April 1975
High-pressure studies of americium metal: Insights into its position in the actinide series journal April 2001
Theoretical investigation of the high-pressure phases of Ce journal January 1998
α-γ transition in Ce. II. A detailed analysis of the Kondo volume-collapse model journal September 1992
First-principles calculations of the electronic structure and spectra of strongly correlated systems: dynamical mean-field theory journal September 1997
Magnetic and Thermodynamic Properties of the Three-Dimensional Periodic Anderson Hamiltonian journal March 1999
Structural Phase Transitions in Yttrium under Pressure journal October 1981
Delocalization and phase transitions in Pr: Theory journal February 2002
The s d transition in compressed lanthanum journal May 1981
The α γ Transition in Ce: A Theoretical View from Optical Spectroscopy journal January 2005
Correlated electrons in δ-plutonium within a dynamical mean-field picture journal April 2001
Phase transformations and equation of state of praseodymium metal to 103 GPa journal August 2000
Theoretical and Experimental Studies on Gadolinium at Ultra High Pressure. journal January 1998
Thermodynamic and spectral properties of compressed Ce calculated using a combined local-density approximation and dynamical mean-field theory journal February 2003
Theory of the crystal structures of cerium and the light actinides journal November 1998
Pressure-induced phase transitions in 5f and 4f metals and compounds journal March 1993
Calculated Phase Diagram for the γ α Transition in Ce journal March 1995
Doping-dependent study of the periodic Anderson model in three dimensions journal November 2003
Monte Carlo Method for Magnetic Impurities in Metals journal June 1986
α-uranium phase in compressed neodymium metal journal February 2000
Orbital polarization in metallic f -electron systems journal May 1995
Structural systematics of 4f and 5f elements under pressure journal June 1995
Determination of triple points in the phase diagram of praseodymium journal July 1995
Phase diagram and equation of state of praseodymium at high pressures and temperatures journal April 2003
Spectral density functionals for electronic structure calculations journal June 2004
Spectral and Magnetic Properties of α - and γ -Ce from Dynamical Mean-Field Theory and Local Density Approximation journal December 2001
Correlation between d -Band Occupancy and Crystal Structure in the Rare Earths journal March 1977
X-ray absorption study of the ‘Pr III’–‘Pr IV’ transition in elemental praseodymium journal February 1995
Two Critical Points on the γ α Phase Boundary of Cerium Alloys journal April 1983
Ultrapressure equation of state of cerium metal to 208 GPa journal February 1999
Cerium Volume Collapse: Results from the Merger of Dynamical Mean-Field Theory and Local Density Approximation journal December 2001
Linear methods in band theory journal October 1975
Pressure Induces Major Changes in the Nature of Americium's 5 f Electrons journal October 2000
Low-Energy Excitations in α - and γ -Ce Observed by Photoemission journal September 1985
First-Principles Approach to the Electronic Structure of Strongly Correlated Systems: Combining the G W Approximation and Dynamical Mean-Field Theory journal February 2003
Dynamical mean-field theory of strongly correlated fermion systems and the limit of infinite dimensions journal January 1996
Volume collapse in the Kondo lattice journal July 1982
High pressure diamond-anvil studies on neodymium to 40.0 GPa journal February 1986
f -State Occupancy at the γ α Phase Transition of Ce-Th and Ce-Sc Alloys journal August 2004
Cohesive properties of the lanthanides: Effect of generalized gradient corrections and crystal structure journal August 1998
Ground and metastable states in γ-Ce from correlated band theory journal March 2001
Numerical algorithm for the double-orbital Hubbard model: Hund-coupled pairing symmetry in the doped case journal November 2004
Crystal grain growth at the α -uranium phase transformation in praseodymium journal January 2005
Evidence for 4 f ‐shell delocalization in praseodymium under pressure journal July 1981
The α-γ transition in cerium is a Mott transition journal September 1974
Kondo Volume Collapse and the γ α Transition in Cerium journal October 1982
Electronic-structure calculations of praseodymium metal by means of modified density-functional theory journal September 1997
Similarities between the Hubbard and Periodic Anderson Models at Finite Temperatures journal July 2000
Crystal structure of the distorted FCC high-pressure phase of praseodymium journal August 1993
Electronic structure of cerium in the self-interaction-corrected local-spin-density approximation journal February 1996

Similar Records

The screening of 4f moments and delocalization in the compressed light rare earths
Journal Article · Wed Aug 19 00:00:00 EDT 2009 · Physical Review. B, Condensed Matter and Materials Physics · OSTI ID:877905

Orbital polarization in narrow band systems
Conference · Sun Jan 01 00:00:00 EST 1989 · OSTI ID:877905

Orbital polarization in narrow-band systems: Application to volume collapses in light lanthanides
Journal Article · Sun Apr 01 00:00:00 EST 1990 · Physical Review, B: Condensed Matter; (USA) · OSTI ID:877905