Publisher's Note: Field induced magnetic order inLa2−xSrxCuO4(x

Anomalies in low-temperature thermal conductivity of underdoped La2−xSrxCuO4single crystals

“…On the other hand, we have also measured κ ab (T ) under magnetic field up to 14 T as shown in figure 2. Although the thermal conductivity is suppressed by application of the magnetic field, which is consistent with previous results of Kudo et al [17], it is found that the drop in κ ab (T ) still exists and its magnitude does not change much, only its position shifts to a slightly higher temperature under the magnetic field up to 14 T. As we know, the electron contribution κ e to the thermal conductivity is suppressed greatly by magnetic field as high as 14 T [17,23]. Therefore this is further evidence for the phonon origin of the thermal conductivity drop.…”

“…The contact resistance is lower than 0.5 . As formerly reported by Nakamura et al [16] and Kudo et al [17], κ ab decreases gradually with lowering temperature, and it exhibits a slight enhancement below the superconducting transition temperature T c defined as the onset temperature of Meissner diamagnetism, which we have reported in our previous paper [15]. T c is a common feature of the high-T c cuprates [16].…”

“…An interesting feature we found is that each underdoped sample exhibits a steplike drop in the κ(T ) curve at the temperature below ∼10 K, and this drop occurs at lower temperature with the lower Sr concentration, as shown in figure 1. In fact we have noted similar behaviour of κ(T ) in underdoped LSCO in the literature [7,17]. Probably, this anomaly was so weak that no author focused on this problem.…”

Distinct Fe-induced magnetic states in the underdoped and overdoped regimes of La2−xSrxCu<

“…In fact, the dynamical stripe correlations are statically stabilized by the application of magnetic field parallel to the c-axis. [47][48][49][50] On the other hand, the magnetic order induced by the Fe substitution in the overdoped regime involves following characteristics different from those in the underdoped regime: (i) the absence of muon-spin precession as shown in Fig. 1, (ii) the sharp magnetic transition as shown in Fig.…”

Strong thermal fluctuations in cuprate superconductors in magnetic fields aboveTc

“…Assuming that Nernst effect is primarily due to thermal fluctuations, the whole pseudogap region would be associated with preformed Cooper pairs and become a precursor of the superconducting state. The finding motivated additional experiments on Nernst effect in various HTSC [4], as well as renewed study of thermal fluctuations in the temperature region between T c and T * by other probes: electric [5] and thermal conductivity [6] and diamagnetism [7]. The main goal was to try to quantify the superconducting fluctuation effects, so they can be either directly linked or separated from the pseudogap physics.…”