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An unusual metallic behavior in a Ag4SSe single crystal

Titelangaben

Matteppanavar, Shidaling ; Bui, Nguyen Hai An ; van Smaalen, Sander ; Thamizhavel, Arumugam ; Ramakrishnan, Srinivasan:
An unusual metallic behavior in a Ag4SSe single crystal.
In: DAE Solid State Physics Symposium 2017. - Melville Park, NY : AIP Publishing , 2018 . - S. 130001 . - (AIP Conference Proceedings ; 1942 )
ISBN 978-0-7354-1634-5
DOI: https://doi.org/10.1063/1.5029071

Angaben zu Projekten

Projektfinanzierung: Alexander von Humboldt-Stiftung

Abstract

We report the magnetic susceptibility, resistivity and heat capacity measurements on high quality single crystalline tetra silver sulphoselenide (Ag4SSe). The magnetic susceptibility and resistivity measurements show anomalies around 260 K. The large diamagnetic drop with hysteresis at the transition implies a first order transition. Such a diamagnetic drop cannot be ascribed to the formation of charge density wave (CDW) since the temperature dependence of the resistivity shows no upturn at this transition. Infact the resistivity is decreasing with decreasing temperature, indicating a metallic behavior. However, unlike normal metals, the resistivity is almost temperature independent in the temperature range from 4-180 K. Usually, when one observes a diamagnetic transition, it is assumed to be due to a drop in the density of states at the Fermi level which leads to the decrease in the Pauli paramagnetic susceptibility. Such a decrease in the density of states often results in an increase in resistivity unless mobility of the charge carriers changes significantly. Hence, we believe that in Ag4SSe, the structural transition causes an unusual Fermi surface reconstruction which in turn leads to a strange metallic behavior at low temperatures.

Weitere Angaben

Publikationsform: Aufsatz in einem Buch
Begutachteter Beitrag: Ja
Institutionen der Universität: Fakultäten
Fakultäten > Fakultät für Mathematik, Physik und Informatik
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Fachgruppe Materialwissenschaften
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Fachgruppe Materialwissenschaften > Lehrstuhl Kristallographie
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Fachgruppe Materialwissenschaften > Lehrstuhl Kristallographie > Lehrstuhl Kristallographie - Univ.-Prof. Dr. Sander van Smaalen
Profilfelder > Advanced Fields > Neue Materialien
Profilfelder
Profilfelder > Advanced Fields
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
Eingestellt am: 13 Apr 2018 08:15
Letzte Änderung: 31 Okt 2023 13:35
URI: https://eref.uni-bayreuth.de/id/eprint/43460