QUANTUM FRUSTRATED AND CORRELATED ELECTRON SYSTEMS P THALMEIER MAX PLANCK INSTITUTE FOR CHEMICAL PHYSCIS OF SOLIDS, 01187 DRESDEN, GERMANY (RECEIVED 25 JANUARY 2008)

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THALMEIER P.

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Journal: Iranian Journal of Physics Research Year:2008 | Volume:8 | Issue:2 Page(s): 25-38

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Title

QUANTUM FRUSTRATED AND CORRELATED ELECTRON SYSTEMS P THALMEIER MAX PLANCK INSTITUTE FOR CHEMICAL PHYSCIS OF SOLIDS, 01187 DRESDEN, GERMANY (RECEIVED 25 JANUARY 2008)

Author(s)

THALMEIER P. | Issue Writer Certificate

Keywords

QUANTIZED SPIN MODELSQ3

BAND AND ITINERANT MODELSQ3

VALENCE FLUCTUATIONQ3

KONDO LATTICEQ3

HEAVY-FERMION PHENOMENAQ3

Abstract

Quantum phases and fluctuations in correlated electron systems with frustration and competing interactions are reviewed. In the localized moment case the S=1/2 J1 - J2 - model on a square lattice exhibits a rich phase diagram with magnetic as well as exotic hidden order phases due to the interplay of frustration and quantum fluctuations. Their signature in magnetocaloric quantities and the high field magnetization are surveyed. The possible quantum phase transitions are discussed and applied to layered vanadium oxides. In itinerant electron systems frustration is an emergent property caused by electron correlations. It leads to enhanced spin fluctuations in a very large region of momentum space and therefore may cause heavy fermion type low temperature anomalies as in the 3d spinel compound LiV2O4 . Competing on-site and inter-site electronic interactions in Kondo compounds are responsible for the quantum phase transition between nonmagnetic Kondo singlet phase and magnetic phase such as observed in many 4f compounds. They may be described by KONDO LATTICE and simplified Kondo necklace type models. Their quantum phase transitions are investigated by numerical exact diagonalization and analytical bond operator methods respectively.

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APA: Copy

THALMEIER, P.. (2008). QUANTUM FRUSTRATED AND CORRELATED ELECTRON SYSTEMS P THALMEIER MAX PLANCK INSTITUTE FOR CHEMICAL PHYSCIS OF SOLIDS, 01187 DRESDEN, GERMANY (RECEIVED 25 JANUARY 2008). IRANIAN JOURNAL OF PHYSICS RESEARCH, 8(2), 25-38. SID. https://sid.ir/paper/1910/en

Vancouver: Copy

THALMEIER P.. QUANTUM FRUSTRATED AND CORRELATED ELECTRON SYSTEMS P THALMEIER MAX PLANCK INSTITUTE FOR CHEMICAL PHYSCIS OF SOLIDS, 01187 DRESDEN, GERMANY (RECEIVED 25 JANUARY 2008). IRANIAN JOURNAL OF PHYSICS RESEARCH[Internet]. 2008;8(2):25-38. Available from: https://sid.ir/paper/1910/en

IEEE: Copy

P. THALMEIER, “QUANTUM FRUSTRATED AND CORRELATED ELECTRON SYSTEMS P THALMEIER MAX PLANCK INSTITUTE FOR CHEMICAL PHYSCIS OF SOLIDS, 01187 DRESDEN, GERMANY (RECEIVED 25 JANUARY 2008),” IRANIAN JOURNAL OF PHYSICS RESEARCH, vol. 8, no. 2, pp. 25–38, 2008, [Online]. Available: https://sid.ir/paper/1910/en

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