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Static and dynamic properties of low- temperature order in the one-dimensional semiconductor (NbSe4)3I


Dominko, Damir; Vdović, Silvije; Skenderović, Hrvoje; Starešinić, Damir; Biljaković, Katica; Ristić, Davor; Ivanda, Mile; Lorenzo, Jose Emilio; Demsar, Jure
Static and dynamic properties of low- temperature order in the one-dimensional semiconductor (NbSe4)3I // Physical review. B., 94 (2016), 10; 104113, 7 doi:10.1103/PhysRevB.94.104113 (međunarodna recenzija, članak, znanstveni)


Naslov
Static and dynamic properties of low- temperature order in the one-dimensional semiconductor (NbSe4)3I

Autori
Dominko, Damir ; Vdović, Silvije ; Skenderović, Hrvoje ; Starešinić, Damir ; Biljaković, Katica ; Ristić, Davor ; Ivanda, Mile ; Lorenzo, Jose Emilio ; Demsar, Jure

Izvornik
Physical review. B. (2469-9950) 94 (2016), 10; 104113, 7

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Pseudo Jahn-Teller ; pump-probe spectroscopy ; Raman spectroscopy ; XRD ; structural phase transition ; phonons

Sažetak
We investigated static and dynamic lattice properties in a quasi one-dimensional charge- ordered semiconductor (NbSe4)3I by using Raman, femtosecond pump-probe spectroscopy and x-ray diffraction. In addition to a well-documented pseudo-Jahn-Teller ferrodistortive structural transition at TC=274 K, where the displacements of Nb ions lead to ferroelectric (FE) in-chain polarization with opposite direction in adjacent chains, all methods suggest an additional lowering of symmetry at T*=160 K. Although antiferroelectric (AFE) phase is partially formed at TC, our results consistently point to an enhancement of the inter-chain order at T*, thus leading to AFE order-disorder transition, as supported by the earlier dielectric and structural studies.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
035-0352827-2842 - Kompleksni modulirani sistemi: nova osnovna stanja, defekti i magnetski efekti (Katica Biljaković, )
098-0982904-2898 - Fizika i primjena nanostruktura i volumne tvari (Mile Ivanda, )

Ustanove
Institut za fiziku, Zagreb,
Institut "Ruđer Bošković", Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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