Colossal thermopower, spin states and delocalization effects in single layered La2−xSrxCoO4
作者： Abdul Ahad , D.K. Shukla , F. Rahman , S. Majid , Tarachand
DOI: 10.1016/J.ACTAMAT.2017.06.030
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摘要: Abstract Hole-doped La2CoO4 compounds have been widely studied due to their multifaceted behavior such as charge ordering, spin ordering and blockade. Hole doping in causes appearance of the Co3+ along with Co2+, which makes it an interesting model system for study spin-state transitions. In hole-doped samples, spin-states ions at large reported low or intermediate state. We report here a on Sr La2CoO4. The has found stabilize crystal structure. By combining structural, electronic structure electrical transport results, is observed that high-spin state present all La2−xSrxCoO4 (x = 0.5, 0.8, 0.9 1.0) samples. be concomitant delocalization e g electrons. addition, these materials, colossal thermopower first time cryogenic temperatures.
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