Naslov
Electronic Scattering on Frustrated Magnetic System: From Antiferromagnetism to the Kondo State in Co1/3NbS2 Under Pressure

Autori
Popčević, Petar ; Jaćimović, J. ; Bilušić, Ante ; Smontara, Ana ; Berger, H. ; Batistić, Ivo ; Piatek, J. ; Tsyrulin, Regnault, L.-P. ; N. ; Barišić, Neven ; Forró, L.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Electronic States and Physers Induced by Electric or Optical Impacts / - , 2012

Skup
Electronic States and Physers Induced by Electric or Optical Impacts

Mjesto i datum
Orsay, Francuska, 10.09.2012. - 14.09.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Electronic Scattering; Co1/3NbS2

Sažetak
Systems with triangular magnetic structure, where the magnetic moments are antiferromagnetically coupled, are interesting to study because of usually complex phase diagrams resulting from competing interactions. Co1/3NbS2 is a layered compound where Co ions are intercalated between NbS2 host layers forming a triangular lattice with antiferromagnetic ordering at 26 K. This is seen as a kink in the in plane electrical resistivity, while the electrical resistivity along the c-axes changes from positive to negative temeprature coefficient below the transition temperature. Hydrostatic pressure suppresses the magnetic ordering temperature to zero at 2 GPa.[1] A disappearance of magnetic ordering with pressure was recently confirmed with the elastic neutron scattering experiment [2]. The ordering mechanism is not yet fully understood, although those scenarios that include super-exchange and the RKKY interactions are natural candidates. At pressures above 3 GPa a minimum in the resistivity appears at 2 K followed by a logarithmic rise of the resistivity at lower temperature.[2] This indicates that the Kondo screening of Co magnetic moments leads to the formation of the Kondo spin liquid. Our experimental measurements are complemented with the density functional theory calculations. The preliminary results suggest that the pressure driven competition between ferro- and antiferromagnetic ordering results in the disappearence of magnetic order. 1. N. Barišić, et al., Phys. Rev. B 84 (2011) 075157. 2. J. Jaćimović, et al., to be published.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
The poster was presented by Petar Popčević. This work was supported in part by the UKF project (65/10) “New electronic states driven by frustration in layered materials”.

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