@article{ISI:000076130500001,
 abstract = {We introduce an extension of the dynamical mean-field approximation
(DMFA) that retains the causal properties and generality of the DMFA,
but allows for systematic inclusion of nonlocal corrections. Our
technique maps the problem to a self-consistently embedded cluster. The
DMFA (exact result) is recovered as the cluster size goes to 1
(infinity). As a demonstration, we study the Falicov-Kimball model using
a variety of cluster sizes. We show that the sum rules are preserved,
the spectra are positive definite, and the nonlocal correlations
suppress the charge-density wave transition temperature.
[S0163-1829(98)51436-1].},
 author = {Hettler, MH and Tahvildar-Zadeh, AN and Jarrell, M and Pruschke, T and
Krishnamurthy, HR},
 doi = {10.1103/PhysRevB.58.R7475},
 eissn = {1550-235X},
 issn = {1098-0121},
 journal = {PHYSICAL REVIEW B},
 month = {SEP 15},
 number = {12},
 orcid-numbers = {Zadeh, Niki/0000-0002-0025-0769
},
 pages = {R7475-R7479},
 researcherid-numbers = {Pruschke, Thomas/H-5046-2011
Zadeh, Niki/N-9914-2019
Zadeh, Niki/F-4532-2014
Pruschke, Thomas/H-5065-2011},
 times-cited = {353},
 title = {Nonlocal dynamical correlations of strongly interacting electron systems},
 unique-id = {ISI:000076130500001},
 volume = {58},
 year = {1998}
}