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Large Fermi Surface of Heavy Electrons at the Border of Mott Insulating State in NiS2

Title: Large Fermi Surface of Heavy Electrons at the Border of Mott Insulating State in NiS2.
Name(s): Friedemann, S., author
Chang, H., author
Gamza, M. B., author
Reiss, P., author
Chen, X., author
Alireza, P., author
Coniglio, W. A., author
Graf, D., author
Tozer, S., author
Grosche, F. M., author
Type of Resource: text
Genre: Text
Date Issued: 2016-05-12
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: One early triumph of quantum physics is the explanation why some materials are metallic whereas others are insulating. While a treatment based on single electron states is correct for most materials this approach can fail spectacularly, when the electrostatic repulsion between electrons causes strong correlations. Not only can these favor new and subtle forms of matter, such as magnetism or superconductivity, they can even cause the electrons in a half-filled energy band to lock into position, producing a correlated, or Mott insulator. The transition into the Mott insulating state raises important fundamental questions. Foremost among these is the fate of the electronic Fermi surface and the associated charge carrier mass, as the Mott transition is approached. We report the first direct observation of the Fermi surface on the metallic side of a Mott insulating transition by high pressure quantum oscillatory measurements in NiS2. Our results point at a large Fermi surface consistent with Luttinger's theorem and a strongly enhanced quasiparticle effective mass. These two findings are in line with central tenets of the Brinkman-Rice picture of the correlated metal near the Mott insulating state and rule out alternative scenarios in which the carrier concentration vanishes continuously at the metal-insulator transition.
Identifier: FSU_libsubv1_wos_000375656900001 (IID), 10.1038/srep25335 (DOI)
Keywords: approximation, crystals, infinite dimensions, magnetic-properties, metal transition, nis2-xsex, pressure, pyrite-structure, Superconductor, system
Publication Note: The publisher’s version of record is available at
Persistent Link to This Record:
Owner Institution: FSU
Is Part Of: Scientific Reports.
Issue: vol. 6

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Friedemann, S., Chang, H., Gamza, M. B., Reiss, P., Chen, X., Alireza, P., … Grosche, F. M. (2016). Large Fermi Surface of Heavy Electrons at the Border of Mott Insulating State in NiS2. Scientific Reports. Retrieved from