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  Observation of a Thermal Expansion Anomaly at 36 K in La2CuO4: Evidence for a Structural Phase Transition

Lang, M., Steglich, F., Schefzyk, R., Lechner, T., Spille, H., Rietschel, H., et al. (1987). Observation of a Thermal Expansion Anomaly at 36 K in La2CuO4: Evidence for a Structural Phase Transition. EPL, 4(10), 1145-1149. doi:10.1209/0295-5075/4/10/011.

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 Creators:
Lang, M.1, Author
Steglich, F.2, Author           
Schefzyk, R.1, Author
Lechner, T.1, Author
Spille, H.1, Author
Rietschel, H.1, Author
Goldacker, W.1, Author
Renker, B.1, Author
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1external, ou_persistent22              
2External Organizations, ou_persistent22              

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 Abstract: We report results for the thermal expansion, α(T), of La2CuO4 and La1.85Sr0.15CuO4. Both compounds exhibit surprisingly similar anomalies in α(T) near 36 K. While for the Sr-doped compound this anomaly is shown to indicate bulk superconductivity, for La2CuO4 it has to be attributed to a structural phase transition. Our results suggest that the onset of superconductivity, both in minor parts of the volume in La2CuO4 and in the bulk of La1.85Sr0.15CuO4, is accompanied and possibly even triggered by this structural transition.

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 Dates: 1987-11-15
 Publication Status: Issued
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Title: EPL
  Other : Europhysics Letters
Source Genre: Journal
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Pages: - Volume / Issue: 4 (10) Sequence Number: - Start / End Page: 1145 - 1149 Identifier: Other: 0295-5075
CoNE: https://pure.mpg.de/cone/journals/resource/0295-5075