Abstract
The presence or absence of a quantum critical point and its location in the phase diagram of high-temperature superconductors have been subjects of intense scrutiny. Clear evidence for quantum criticality, particularly in the transport properties, has proved elusive because the important low-temperature region is masked by the onset of superconductivity. We present measurements of the low-temperature in-plane resistivity of several highly doped La 2-xSrxCuO4 single crystals in which the superconductivity had been stripped away by using high magnetic fields. In contrast to other quantum critical systems, the resistivity varies linearly with temperature over a wide doping range with a gradient that scales monotonically with the superconducting transition temperature. It is maximal at a critical doping level (pc) ∼ 0.19 at which superconductivity is most robust. Moreover, its value at pc corresponds to the onset of quasi-particle incoherence along specific momentum directions, implying that the interaction that first promotes high-temperature superconductivity may ultimately destroy the very quasi-particle states involved in the superconducting pairing.
| Original language | English |
|---|---|
| Pages (from-to) | 603-607 |
| Number of pages | 5 |
| Journal | Science |
| Volume | 323 |
| Issue number | 5914 |
| DOIs | |
| Publication status | Published - Jan 30 2009 |
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Anomalous criticality in the electrical resistivity of La 2-xSrxCuO4. / Cooper, R. A.; Wang, Y.; Vignolle, B.; Lipscombe, O. J.; Hayden, S. M.; Tanabe, Y.; Adachi, T.; Koike, Y.; Nohara, Minoru; Takagi, H.; Proust, Cyril; Hussey, N. E.
In: Science, Vol. 323, No. 5914, 30.01.2009, p. 603-607.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Anomalous criticality in the electrical resistivity of La 2-xSrxCuO4
AU - Cooper, R. A.
AU - Wang, Y.
AU - Vignolle, B.
AU - Lipscombe, O. J.
AU - Hayden, S. M.
AU - Tanabe, Y.
AU - Adachi, T.
AU - Koike, Y.
AU - Nohara, Minoru
AU - Takagi, H.
AU - Proust, Cyril
AU - Hussey, N. E.
PY - 2009/1/30
Y1 - 2009/1/30
N2 - The presence or absence of a quantum critical point and its location in the phase diagram of high-temperature superconductors have been subjects of intense scrutiny. Clear evidence for quantum criticality, particularly in the transport properties, has proved elusive because the important low-temperature region is masked by the onset of superconductivity. We present measurements of the low-temperature in-plane resistivity of several highly doped La 2-xSrxCuO4 single crystals in which the superconductivity had been stripped away by using high magnetic fields. In contrast to other quantum critical systems, the resistivity varies linearly with temperature over a wide doping range with a gradient that scales monotonically with the superconducting transition temperature. It is maximal at a critical doping level (pc) ∼ 0.19 at which superconductivity is most robust. Moreover, its value at pc corresponds to the onset of quasi-particle incoherence along specific momentum directions, implying that the interaction that first promotes high-temperature superconductivity may ultimately destroy the very quasi-particle states involved in the superconducting pairing.
AB - The presence or absence of a quantum critical point and its location in the phase diagram of high-temperature superconductors have been subjects of intense scrutiny. Clear evidence for quantum criticality, particularly in the transport properties, has proved elusive because the important low-temperature region is masked by the onset of superconductivity. We present measurements of the low-temperature in-plane resistivity of several highly doped La 2-xSrxCuO4 single crystals in which the superconductivity had been stripped away by using high magnetic fields. In contrast to other quantum critical systems, the resistivity varies linearly with temperature over a wide doping range with a gradient that scales monotonically with the superconducting transition temperature. It is maximal at a critical doping level (pc) ∼ 0.19 at which superconductivity is most robust. Moreover, its value at pc corresponds to the onset of quasi-particle incoherence along specific momentum directions, implying that the interaction that first promotes high-temperature superconductivity may ultimately destroy the very quasi-particle states involved in the superconducting pairing.
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UR - http://www.scopus.com/inward/citedby.url?scp=59249096368&partnerID=8YFLogxK
U2 - 10.1126/science.1165015
DO - 10.1126/science.1165015
M3 - Article
VL - 323
SP - 603
EP - 607
JO - Science
JF - Science
SN - 0036-8075
IS - 5914
ER -