Evidence for Critical Lattice Fluctuations in the High Tc Cuprates
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概要
- 論文の詳細を見る
Here we provide a direct experimental evidence for critical local lattice fluctuations in the high Tc superconductors. Cu K-edge extended X-ray absorption fine structure (EXAFS) has been used to measure the distribution of Cu–O bond lengths and the amplitude of local lattice distortions in different materials with increasing chemical pressure on the CuO2 layers. The stripe formation temperature Tco is determined by the upturn of the Debye Waller factor due to the onset of local lattice distortions. A decrease of the amplitude of lattice fluctuations at the superconducting transition reveals their role in the pairing mechanism. The dynamical lattice fluctuations in the normal phase for T>Tco show diverging lattice fluctuations at the critical chemical pressure εc.
- Physical Society of Japanの論文
- 2001-07-15
著者
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Oyanagi Hiroyuki
Electrotech. Lab. Tsukuba
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Saini Naurang
Unità INFM Dipartimento di Fisica, Università di Roma "La Sapienza",
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Oyanagi Hiroyuki
Electrotechnical Laboratory, 1-1-4 Umezono, Tsukuba 305-8568
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Bianconi Antonio
Unità INFM Dipartimento di Fisica, Università di Roma "La Sapienza",
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Bianconi Antonio
Unità INFM Dipartimento di Fisica, Università di Roma "La Sapienza",
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OYANAGI Hiroyuki
Electrotech. Lab. , Tsukuba
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