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Pregled bibliografske jedinice broj: 127932

Variable-range hopping conductivity in the copper-oxygen chains of La3Sr3Ca8Cu24O41


Vuletić, Tomislav; Korin-Hamzić, Bojana; Tomić, Silvia; Gorshunov, Boris; Haas, P.; Dressel, Martin; Akimitsu, J.; Sasaki T.; Nagata T.
Variable-range hopping conductivity in the copper-oxygen chains of La3Sr3Ca8Cu24O41 // Physical Review B, 67 (2003), 184521 (1-4) (međunarodna recenzija, članak, znanstveni)


Naslov
Variable-range hopping conductivity in the copper-oxygen chains of La3Sr3Ca8Cu24O41

Autori
Vuletić, Tomislav ; Korin-Hamzić, Bojana ; Tomić, Silvia ; Gorshunov, Boris ; Haas, P. ; Dressel, Martin ; Akimitsu, J. ; Sasaki T. ; Nagata T.

Izvornik
Physical Review B (0163-1829) 67 (2003); 184521 (1-4)

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

Ključne riječi
Spin ladders; variable-range hopping; dielectrci response; optical response

Sažetak
We show that the spin chain/ladder compound La 3 Sr 3 Ca 8 Cu 24 O 41 is an insulator with hopping transport along the chains. In the temperature range 35– 280 K, dc conductivity sigma dc (T) follows Mott’ s law of variable-range hopping conduction ; the frequency dependence has the form sigma( n, T)= sigma dc (T) +A(T) n^s , where s=1. The conduction mechanism changes from variable-range hopping to nearest-neighbor hopping around T c =300 K. The chain array thus behaves as a one-dimensional disordered system. Disorder is due to random structural distortions of chains induced by irregular coordination of the La/Sr/Ca ions.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
0035015

Ustanove
Institut za fiziku, Zagreb

Časopis indeksira:


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