Pressure and alloying effects on the metal to insulator transition in NiS2-xSex studied by infrared spectroscopy

Perucchi A, Marini C, Valentini M, Postorino P, Sopracase R, Dore P, Hansmann P, Jepsen O, Sangiovanni G, Toschi A, Held K, Topwal D, Sarma DD, Lupi S (2009)

Publication Type: Journal article

Publication year: 2009

Journal

Physical Review B American Physical Society

Book Volume: 80

Article Number: ARTN 073101

Journal Issue: 7

DOI: 10.1103/PhysRevB.80.073101

Abstract

The metal to insulator transition in the charge-transfer NiS2-xSex compound has been investigated through infrared reflectivity. Measurements performed by applying pressure to pure NiS2 (lattice contraction) and by Se alloying (lattice expansion) reveal that in both cases an anomalous metallic state is obtained. We find that optical results are not compatible with the linear Se-alloying vs pressure-scaling relation previously established through transport, thus pointing out the substantially different microscopic origin of the two transitions.

Authors with CRIS profile

Philipp Hansmann

Involved external institutions

Elettra Sincrotrone Trieste S.C.p.A. IT Italy (IT) Università degli studi "La Sapienza" IT Italy (IT) Max-Planck-Institut für Festkörperforschung DE Germany (DE) Technische Universität Wien / Vienna University of Technology AT Austria (AT) The Abdus Salam International Centre for Theoretical Physics ICTP IT Italy (IT) Indian Association for the Cultivation Of Science IN India (IN)

How to cite

APA:

Perucchi, A., Marini, C., Valentini, M., Postorino, P., Sopracase, R., Dore, P.,... Lupi, S. (2009). Pressure and alloying effects on the metal to insulator transition in NiS2-xSex studied by infrared spectroscopy. Physical Review B, 80(7). https://dx.doi.org/10.1103/PhysRevB.80.073101

MLA:

Perucchi, A., et al. "Pressure and alloying effects on the metal to insulator transition in NiS2-xSex studied by infrared spectroscopy." Physical Review B 80.7 (2009).

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