Appearance of Universal Metallic Dispersion in a Doped Mott Insulator (2008)
Sahrakorpi, S., Markiewicz, R. S., Lin, Hsin, Lindroos, M., Zhou, X. J., Yoshida, T., ...
We have investigated the dispersion renormalization $Z_{disp}$ in La$_{2-x}$Sr$_x$CuO$_4$ (LSCO) over the wide doping range of $x=0.03-0.30$, for binding energies extending to several hundred meV's....
Liu, Haiyun, Liu, Guodong, Zhang, Wentao, Zhao, Lin, Meng, Jianqiao, Jia, Xiaowen, ...
High-resolution laser-based angle-resolved photoemission measurements have been carried out on the electron-doped (Nd$_{1.85}$Ce$_{0.15}$)CuO$_4$ high temperature superconductor. We have revealed a...
Jelbert, G. R., Sasagawa, T., Fletcher, J. D., Park, T., Thompson, J. D., Panagopoulos, C.
We report on the charge kinetics of La_2CuO_4 lightly doped with Li and Sr. Impedance spectroscopy measurements down to 25mK and from 20Hz to 500kHz reveal evidence for low energy charge dynamics,...
Ikeda, M., Yoshida, T., Fujimori, A., Kubota, M., Ono, K., Das, Hena, ...
We have performed angle-resolved photoemission spectroscopy (ARPES) measurements and first-principles electronic structure calculations on the electron-doped high-Tc superconductors Ln1.85Ce0.15CuO4...
Raicevic, I., Jaroszynski, J., Popovic, Dragana, Panagopoulos, C., Sasagawa, T.
A c-axis magnetotransport and resistance noise study in La_{1.97}Sr_{0.03}CuO_{4} reveals clear signatures of glassiness, such as hysteresis, memory, and slow, correlated dynamics, but only at...
Abrupt Onset of Second Energy Gap at Superconducting Transition of Underdoped Bi2212 (2008)
Lee, W. S., Vishik, I. M., Tanaka, K., Lu, D. H., Sasagawa, T., Nagaosa, N., ...
The superconducting gap - an energy scale tied to the superconducting phenomena-opens on the Fermi surface at the superconducting transition temperature (TC) in conventional BCS superconductors....
Zhang, Wentao, Liu, Guodong, Meng, Jianqiao, Zhao, Lin, Liu, Haiyun, Dong, Xiaoli, ...
Super-high resolution laser-based angle-resolved photoemission (ARPES) measurements have been carried out on the high energy electron dynamics in Bi2Sr2CaCu2O8 (Bi2212) high temperature...
Zhang, Wentao, Liu, Guodong, Zhao, Lin, Liu, Haiyun, Meng, Jianqiao, Dong, Xiaoli, ...
Laser-based angle-resolved photoemission measurements with super-high resolution have been carried out on an optimally-doped Bi$_2$Sr$_2$CaCu$_2$O$_8$ high temperature superconductor. New high energy...
Unusual oxygen isotope effects in cuprates -- importance of doping (2007)
Sasagawa, T., Takagi, H., Lanzara, A.
A recent angle resolved photoelectron spectroscopy (ARPES) study by Douglas et al. \cite {dessau-comment} on oxygen isotope exchanged Bi_2Sr_2CaCu_2O$_{8+\delta}$ superconductors reported an absence...
Electron Correlation Driven Heavy-Fermion Formation in LiV2O4 (2007)
Jönsson, P. E., Takenaka, K., Niitaka, S., Sasagawa, T., Sugai, S., Takagi, H.
Optical reflectivity measurements were performed on a single crystal of the d-electron heavy-fermion (HF) metal LiV2O4. The results evidence the highly incoherent character of the charge dynamics for...
Li, Y. W., Qian, D., Wray, L., Hsieh, D., Kaga, Y., Sasagawa, T., ...
Momentum resolved inelastic resonant x-ray scattering is used to map the evolution of charge excitations over a large range of energies, momenta and doping levels in the electron doped Mott insulator...
Lake, B., Ronnow, H. M., Christensen, N. B., Aeppli, G., Lefmann, K., McMorrow, D. F., ...
One view of the high-transition-temperature (high-T-c) copper oxide superconductors is that they are conventional superconductors where the pairing occurs between weakly interacting quasi-particles...
Field-induced antiferromagnetism in the high-temperature superconductor La2-xSrxCuO4 (2007)
Lake, B., Mason, T. E., Aeppli, G., Lefmann, K., Christensen, N. B., McMorrow, D. F., ...
Vortex magnetism in the high-temperatures superconductor La2-xSrxCuO4 (2007)
Lake, B., Mason, T. E., Aeppli, G., Lefmann, K., Christensen, N. B., McMorrow, D. F., ...
Effects of magnetic field on the cuprate high-T-c superconductor La2-xSrxCuO4 (2007)
Lake, B., Aeppli, G., Christensen, N. B., Lefmann, K., McMorrow, D. F., Clausen, K. N., ...
This article discusses neutron scattering measurements on the cuprate, high transition temperature superconductor La2-xSrxCuO4 (LSCO) in an applied magnetic field. LSCO is a type-II superconductor...
Three-dimensionality of field-induced magnetism in a high-temperature superconductor (2007)
Lake, B., Lefmann, K., Christensen, N. B., Aeppli, G., McMorrow, D. F., Ronnow, H. M., ...
Many physical properties of high-temperature superconductors are two-dimensional phenomena derived from their square-planar CuO2 building blocks. This is especially true of the magnetism from the...
Zhou, S. Y., Watson, M. C., Sasagawa, T., Takagi, H., Lanzara, A.
We discuss the nature of electron-lattice interaction in optimally doped Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ samples, using isotope effect (IE) in angle resolved photoemission spectroscopy (ARPES)...
Ikeda, M., Yoshida, T., Fujimori, A., Kubota, M., Ono, K., Unozawa, K., ...
We have performed an angle-resolved photoemission study of the electron-doped high-Tc superconductors (HTSCs) Sm_{1.85}Ce_{0.15}CuO_{4} (SCCO) and Eu_{1.85}Ce_{0.15}CuO_{4} (ECCO). Around the nodal...
The hierarchy of multiple many-body interaction scales in high-temperature superconductors (2006)
Meevasana, W., Zhou, X. J., Sahrakorpi, S., Lee, W. S., Yang, W. L., Tanaka, K., ...
To date, angle-resolved photoemission spectroscopy has been successful in identifying energy scales of the many-body interactions in correlated materials, focused on binding energies of up to a few...
Graf, J., McElroy, K., Zhou, S.Y., Jozwiak, C., Rotenberg, E., ...
A universal high energy anomaly in the single particle spectral function is reported in three different families of high temperature superconductors by using angle-resolved photoemission...
Graf, J., McElroy, K., Zhou, S. Y., Jozwiak, C., Rotenberg, E., ...
A universal high energy anomaly in the single particle spectral function is reported in three different families of high temperature superconductors by using angle-resolved photoemission...
Three-dimensionality of field-induced magnetism in a high-temperature superconductor (2006)
Lake, B., Lefmann, K., Christensen, N. B., Aeppli, G., McMorrow, D. F., Ronnow, H. M., ...
Many physical properties of high-temperature (high-Tc) superconductors are two-dimensional phenomena derived from their square planar CuO2 building blocks. This is especially true of the magnetism...
McElroy, K., Zhou, S. Y., Graf, J., Uchida, S., Eisaki, H., ...
The joint density of states (JDOS) of Bi2Sr2CaCu2O8+x is calculated by evaluating the autocorrelation of the single particle spectral function A(k,omega) measured from angle resolved photoemission...
Polaronic behavior of undoped high-Tc cuprates (2005)
Rösch, O., Gunnarsson, O., Zhou, X. J., Yoshida, T., Sasagawa, T., Fujimori, A., ...
We present angle-resolved photoemission spectroscopy (ARPES) data on undoped La2CuO4, indicating polaronic coupling between bosons and charge carriers. Using a shell model, we calculate the...
Three dimensionality of field-induced magnetism in a high-temperature superconductor (2005)
Lake, B, Lefmann, K, Christensen, NB, Aeppli, G, McMorrow, DF, Voderwisch, P, ...
Waku, K., Katsufuji, T., Kohsaka, Y., Sasagawa, T., Takagi, H., Kishida, H., ...
We report the reflectivity and the resistivity measurement of Ca_{2-x}Na_{x}CuO_{2}Cl_{2} (CNCOC), which has a single-CuO2-plane lattice with no orthorhombic distortion. The doping dependence of the...
An unusual isotope effect in a high-transition-temperature superconductor (2004)
Sasagawa, T., Zhou, S. Y., Graf, J., Takagi, H., ...
In conventional superconductors, the electron pairing that allows superconductivity is caused by exchange of virtual phonons, which are quanta of lattice vibration. For high-transition-temperature...
Hasan, M. Z., Li, Y., Qian, D., Eisaki, H., Uchida, S., ...
Electron behavior in doped Mott systems continues to be a major unsolved problem in quantum many-electron physics. A central issue in understanding the universal Mott behavior in a variety of complex...
Multiple Bosonic Mode Coupling in Electron Self-Energy of (La_2-xSr_x)CuO_4 (2004)
Zhou, X. J., Shi, Junren, Yoshida, T., Cuk, T., Yang, W. L., Brouet, V., ...
High resolution angle-resolved photoemission spectroscopy data along the (0,0)-($\pi$,$\pi$) nodal direction with significantly improved statistics reveal fine structure in the electron self-energy...
An unusual isotope effect in a high-transition-temperature superconductor (2004)
Sasagawa, T., Zhou, S.Y., Graf, J., Takagi, H., ...
In conventional superconductors, the electron pairing that allows superconductivity is caused by exchange of virtual phonons, which are quanta of lattice vibration. For high-transition-temperature...
Zhou, X. J., Yoshida, T., Yang, W. L., Brouet, V., Zhou, F., ...
High resolution angle-resolved photoemission measurements on underdoped (La$_{2-x}$Sr$_x$)CuO$_4$ system show that, at energies below 70 meV, the quasiparticle peak is well defined around the...
Effects of magnetic field on the cuprate high-T-c superconductor La2-xSrxCuO4 (2004)
Lake, B, Aeppli, G, Christensen, N B, Lefmann, K, McMorrow, D F, Clausen, K N, ...
Takeshita, N., Sasagawa, T., Sugioka, T., Tokura, Y., Takagi, H.
The effect of uniaxial pressure on superconductivity was examined for a high-Tc cuprate La1.64Eu0.2Sr0.16CuO4, which is located at the boundary between the superconducting and stripe phases. We found...
Ronning, F., Sasagawa, T., Kohsaka, Y., Shen, K. M., Damascelli, A., Kim, C., ...
We present angle resolved photoemission (ARPES) data on Na-doped Ca$_2$CuO$_2$Cl$_2$. We demonstrate that the chemical potential shifts upon doping the system across the insulator to metal...
Universal nodal Fermi velocity (2003)
Zhou, X. J., Yoshida, T., Lanzara, A., Bogdanov, P. V., Kellar, S. A., Shen, K. M., ...
Kohsaka, Y., Sasagawa, T., Ronning, F., Yoshida, T., Kim, C., Hanaguri, T., ...
Electronic evolution from an antiferromagnet to a high-Tc superconductor is revealed by angle-resolved photoemission experiments on tetragonal Ca(1.9)Na(0.1)CuO(2)Cl(2) single crystals, which were...
Sasagawa, T., Mang, P. K., Vajk, O. P., Kapitulnik, A., Greven, M.
Although La(2)Cu(1-x)Li(x)O(4) [Li-LCO] differs from La(2-x)Sr(x)CuO(4) [Sr-LCO] in many ways (e.g., the absence of metallic transport, high-Tc superconductivity, and incommensurate antiferromagnetic...
Nodal metallic behavior of lightly-doped La$_{2-x}$Sr$_x$CuO$_4$ (2002)
Yoshida, T., Zhou, X. J., Sasagawa, T., Yang, W. L., Bogdanov, P. V., Lanzara, A., ...
Lightly-doped La$_{2-x}$Sr$_x$CuO$_4$ in the so-called "insulating" spin-glass/diagonal-stripe phase has been studied by angle-resolved photoemission spectroscopy. A quasi-particle (QP) peak crossing...
Lake, B, Ronnow, HM, Christensen, NB, Aeppli, G, Lefmann, K, McMorrow, DF, ...
One view of the cuprate high-transition temperature (high-Tc) superconductors is that they are conventional superconductors where the pairing occurs between weakly interacting quasiparticles, which...
Lake, B., Rønnow, H.M., Christensen, N.B., Aeppli, G., Lefmann, K., McMorrow, D.F., ...
One view of the high-transition-temperature (high-Tc) copper oxide superconductors is that they are conventional superconductors where the pairing occurs between weakly interacting quasiparticles...
Antiferromagnetic vortex state in a high-temperature superconductor (2001)
Lake, B., Ronnow, H. M., Christensen, N. B., Aeppli, G., Lefmann, K., McMorrow, D. F., ...
There is strong evidence that magnetic interactions play a crucial role in the mechanism driving high-temperature superconductivity in cuprate superconductors. To investigate this further we have...
Hofer, J., Conder, K., Sasagawa, T., Zhao, Guo-meng, Willemin, M., Keller, H., ...
We report measurements of the oxygen isotope effect (OIE) on the in-plane penetration depth \lambda_{ab}(0) in underdoped La_{2-x}Sr_{x}CuO_{4} single crystals. A highly sensitive magnetic torque...
Hofer, J., Schneider, T., Singer, J. M., Willemin, M., Keller, H., Sasagawa, T., ...
Angular-dependent magnetic torque measurements performed near the critical temperature on single crystals of HgBa_{2}CuO_{4+y}, La_{2-x}Sr{x}CuO_{4}, and YBa_{2}Cu_{3}O_{6.93} are scaled, following...
The Pseudogap in La(2-x)Sr(x)CuO(4): A Raman Viewpoint (1999)
Naeini, J. G., Irwin, J. C., Sasagawa, T., Togawa, Y., Kishio, K.
We report the results of Raman scattering experiments on single crystals of La(2-x)Sr(x)CuO(4) [La214] as a function of temperature and doping. In underdoped compounds low-energy B1g spectral weight...
Doping Dependent Density of States and Pseudogap Behavior in La2-xSrxCuO4 (1998)
Ino, A., Mizokawa, T., Kobayashi, K., Fujimori, A., Sasagawa, T., Kimura, T., ...
We have made a high-resolution photoemission study of La2-xSrxCuO4 in a wide hole concentration (x) range from a heavily overdoped metal to an undoped insulator. As x decreases, the spectral density...
Nakajima, T, Kinoshita, S, Sasagawa, T, Sasaki, K, Naruto, M, Kishimoto, T, ...
NF-IL6, a member of the basic leucine zipper (bZIP) family transcription factors, is involved in expression of inducible genes involved in immune and inflammatory responses. We observed that...
Sasagawa, T, Inoue, M, Lehtinen, M, Zhang, W, Gschmeissner, S E, Hajibagheri, M A, ...
Serum samples from 36 cervical carcinoma patients, 33 patients with high-grade squamous intraepithelial lesions, and 31 cytologically normal women were tested by enzyme-linked immunosorbent assay...
Involvement of human papillomavirus type 20 in epidermodysplasia verruciformis skin carcinogenesis.
Yutsudo, M, Tanigaki, T, Kanda, R, Sasagawa, T, Inoue, T, Jing, P, ...
The involvement of human papillomavirus (HPV) in skin carcinogenesis in a patient with epidermodysplasia verruciformis was studied. This patient had disseminated pityriasis versicolor-like lesions,...
Nakajima, T, Kinoshita, S, Sasagawa, T, Sasaki, K, Naruto, M, Kishimoto, T, ...
NF-IL6, a member of the basic leucine zipper (bZIP) family transcription factors, is involved in expression of inducible genes involved in immune and inflammatory responses. We observed that...
Sasagawa, T, Inoue, M, Lehtinen, M, Zhang, W, Gschmeissner, S E, Hajibagheri, M A, ...
Serum samples from 36 cervical carcinoma patients, 33 patients with high-grade squamous intraepithelial lesions, and 31 cytologically normal women were tested by enzyme-linked immunosorbent assay...
Involvement of human papillomavirus type 20 in epidermodysplasia verruciformis skin carcinogenesis.
Yutsudo, M, Tanigaki, T, Kanda, R, Sasagawa, T, Inoue, T, Jing, P, ...
The involvement of human papillomavirus (HPV) in skin carcinogenesis in a patient with epidermodysplasia verruciformis was studied. This patient had disseminated pityriasis versicolor-like lesions,...