Superconductivity and Antiferromagnetism In Fe(Te1-xSx)y System (2008)
Fang, M. H., Qian, B., Pham, H. M., Yang, J. H., Liu, T. J., Vehstedt, E. K., ...
We have synthesized polycrystalline samples and single crystals of Fe(Te1-xSx)y, and characterized their properties. Our results show that the solid solution of S in this system is limited, < 30%. We...
Incommensurate magnetic order in the alpha-Fe(Te,Se) superconductor systems (2008)
Bao, Wei, Qiu, Y., Huang, Q., Green, M. A., Zajdel, P., Fitzsimmons, M. R., ...
Magnetic spin fluctuations is one candidate to produce the bosonic modes that mediate the superconductivity in the ferrous superconductors. Up until now, all of the LaOFeAs and BaFe2As2 structure...
Superconductivity close to magnetic instability in Fe(Se1-xTex)0.82 (2008)
Fang, M. H., Pham, H. M., Qian, B., Liu, T. J., Vehstedt, E. K., Liu, Y., ...
We report our study of the evolution of superconductivity and the phase diagram of the ternary Fe(Se1-xTex)0.82 (0
Spin-valve effect and magnetoresistivity in single crystalline Ca3Ru2O7 (2008)
Bao, Wei, Mao, Z. Q., Qu, Z., Lynn, J. W.
The laminar perovskite Ca3Ru2O7 naturally forms ferromagnetic double-layers of alternating moment directions, as in the spin-valve superlattices. The mechanism of huge magnetoresistive effect in the...
Xu, X. F., Xu, Z. A., Liu, T. J., Fobes, D., Mao, Z. Q., Luo, J. L., ...
We present the first measurement on Nernst effect in the normal state of odd-parity, spin-triplet superconductor Sr$_{2}$RuO$_{4}$. Below 100 K, the Nernst signal was found to be negative, large,...
Unconventional Quantum Critical Phenomena in (Sr_{1-x}Ca_x)_3 Ru_2 O_7 (2007)
Qu, Z., Spinu, L., Dobrosavljevic, V., Bao, W., Lynn, J. W., Peng, J., ...
In this letter, we report disorder-induced unconventional quantum critical behaviors in (Sr_{1-x}Ca_{x})_{3}Ru_{2}O_{7} (0 $\leq$ $x$ $\leq$ 1). We discovered a quantum phase which obeys a new...
Observation of a mixed pairing state in Ru microdomains embedded in $Sr_2 Ru O_4$ (2006)
Long, Z., Andreou, C., Mao, Z. Q., Yaguchi, H., Maeno, Y., Liu, Y.
We report first measurements on tunneling into the {\it interior} of a Ru microdomain embedded in bulk chiral p-wave superconductor Sr$_{2}$RuO$_{4}$. The junctions were prepared by pressing a pure...
Competing magnetic fluctuations in Sr3Ru2O7 probed by Ti doping (2006)
Hooper, J., Fang, M. H., Zhou, M., Fobes, D., Dang, N., Mao, Z. Q., ...
We report the effect of nonmagnetic Ti4+ impurities on the electronic and magnetic properties of Sr3Ru2O7. Small amounts of Ti suppress the characteristic peak in magnetic susceptibility near 16 K...
Magnetic transition and magnetic structure of Sr4Ru3O10 (2006)
Bao, Wei, Mao, Z. Q., Zhou, M., Hooper, J., Lynn, J. W., Freitas, R. S., ...
We have investigated the magnetic transition and magnetic structure of triple-layered ruthenate Sr4Ru3O10 directly using neutron scattering techniques. Only one ferromagnetic phase is observed, and...
Orbital-dependent metamagnetic response in Sr4Ru3O10 (2006)
Jo, Y. J., Balicas, L., Kikugawa, N., Choi, E. S., Storr, K., Zhou, M., ...
We show that the metamagnetic transition in Sr$_4$Ru$_3$O$_{10}$ bifurcates into two transitions as the field is rotated away from the conducting planes. This two-step process comprises partial or...
Ingle, N. J. C., Shen, K. M., Baumberger, F., Meevasana, W., Lu, D. H., Shen, Z. X., ...
ARPES spectra hold a wealth of information about the many-body interactions in a correlated material. However, the quantitative analysis of ARPES spectra to extract the various coupling parameters in...
Elastic Tensor of Sr$_2$RuO$_4$ (2002)
Paglione, Johnpierre, Lupien, C., MacFarlane, W. A., Perz, J. M., Taillefer, Louis, Mao, Z. Q., ...
The six independent elastic constants of Sr$_2$RuO$_4$ were determined using resonant ultrasound spectroscopy on a high-quality single-crystal specimen. The constants are in excellent agreement with...
Universal Heat Transport in Sr2RuO4 (2002)
Suzuki, M., Tanatar, M. A., Kikugawa, N., Mao, Z. Q., Maeno, Y., Ishiguro, T.
We present the temperature dependence of the thermal conductivity kappa(T) of the unconventional superconductor Sr_2RuO_4 down to low temperatures (100 mK). In T -> 0 K limit we found a finite...
Direct observation of the superconducting gap of Sr2RuO4 (2002)
Upward, M.D., L. P. Kouwenhoven, L.P, Morpurgo, A.F., Kikugawa, N., Mao, Z.Q., Y. Maeno, Y.
Surface electronic structure of Sr2RuO4 (2001)
Shen, K. M., Damascelli, A., Lu, D. H., Armitage, N. P., Ronning, F., Feng, D. L., ...
We have addressed the possibility of surface ferromagnetism in Sr2RuO4 by investigating its surface electronic states by angle-resolved photoemission spectroscopy (ARPES). By cleaving samples under...
Mao, Z. Q., Rosario, M. M., Nelson, K. D., Wu, K., Deac, I. G., Schiffer, P., ...
We have measured upper-critical-field $H_{\text c2}$, specific heat C, and tunneling spectra of the intermetallic perovskite superconductor MgCNi${}_3$ with a superconducting transition temperature...
Anisotropy of magnetothermal conductivity in Sr2RuO4 (2001)
Tanatar, M. A., Suzuki, M., Nagai, S., Mao, Z. Q., Maeno, Y., Ishiguro, T.
The dependence of in-plane and interplane thermal conductivities of Sr2RuO4 on temperature, as well as magnetic field strength and orientation, is reported. We found no notable anisotropy in the...
Quasi-particle Density in Sr2RuO4 Probed by means of the Phonon Thermal Conductivity (2001)
Suzuki, M., Tanatar, M. A., Mao, Z. Q., Maeno, Y., Ishiguro, T.
The thermal conductivity of Sr2RuO4 along the least conducting direction perpendicular to the RuO2 plane has been studied down to 0.3 K. In this configuration the phonons remain the dominant heat...
Liu, Y., Jin, R., Mao, Z. Q., Nelson, K. D., Haas, M. K., Cava, R. J.
We report the results of Hall coefficient R_H and magnetoresistance (MR) measurements on single crystalline samples of Sr3Ru2O7 grown by the floating zone method. R_H was found to be positive over...
Observation of Andreev Surface Bound States in the 3-K phase Region of Sr_2RuO_4 (2001)
Mao, Z. Q., Nelson, K. D., Jin, R., Liu, Y., Maeno, Y.
The tunneling spectrum of the superconducting phase with T_c ~ 3.0 K has been measured in the Ru-embedded region of Sr_2RuO_4 using cleaved junctions. A sharp zero-bias conductance peak (ZBCP) has...
Lupien, C., MacFarlane, W. A., Proust, Cyril, Taillefer, Louis, Mao, Z. Q., Maeno, Y.
We present a study of the electronic ultrasound attenuation $\alpha$ in the unconventional superconductor Sr$_2$RuO$_4$ . The power law behavior of $\alpha$ at temperatures down to $T_c/30$ clearly...
Fermi surface of Sr2RuO4 from angle resolved photoemission (2000)
Damascelli, A., Shen, K. M., Lu, D. H., Armitage, N. P., Ronning, F., Feng, D. L., ...
We investigated the low-energy electronic structure of Sr2RuO4 by angle-resolved photoemission spectroscopy (ARPES) focusing, in particular, on the controversial issues of the Fermi surface (FS)...
Fermi Surface, Surface States, and Surface Reconstruction in Sr2RuO4 (2000)
Damascelli, A., Lu, D. H., Shen, K. M., Armitage, N. P., Ronning, F., Feng, D. L., ...
The electronic structure of Sr2RuO4 is investigated by high angular resolution ARPES at several incident photon energies. We address the controversial issues of the Fermi surface (FS) topology and of...
Kealey, P. G., Riseman, T. M., Forgan, E. M., Galvin, L. M., Mackenzie, A. P., Lee, S. L., ...
We have measured the diffracted neutron scattering intensities from the square magnetic flux lattice in the perovskite superconductor Sr$_2$RuO$_4$, which is thought to exhibit p-wave pairing with a...
Vortex lattice structures and pairing symmetry in Sr2RuO4 (2000)
Agterberg, D. F., Heeb, R., Kealey, P. G., Riseman, T. M., Forgan, E. M., Mackenzie, A. P., ...
Recent experimental results indicate that superconductivity in Sr2RuO4 is described by the p-wave E_u representation of the D_{4h} point group. Results on the vortex lattice structures for this...
Selection Rule in Josephson Coupling between In and Sr2RuO4 (1999)
Jin, R., Liu, Y., Mao, Z. Q., Maeno, Y.
We have studied the Josephson coupling between a conventional s-wave superconductor (In) and Sr2RuO4 and found that the coupling is allowed in the in-plane direction, but not along the c axis. This...
Cyclotron Resonance in the Layered Perovskite Superconductor Sr2RuO4 (1999)
Hill, S., Brooks, J. S., Mao, Z. Q., Maeno, Y.
We have measured the cyclotron masses in Sr2RuO4 through the observation of periodic-orbit-resonances - a magnetic resonance technique closely related to cyclotron resonance. We obtain values for the...
Time-Reversal Symmetry Breaking Superconductivity in Sr2RuO4 (1998)
Luke, G. M., Fudamoto, Y., Kojima, K. M., Larkin, M. I., Merrin, J., Nachumi, B., ...
We report muon spin relaxation measurements on the superconductor Sr2RuO4 that reveal the spontaneous appearance of an internal magnetic field below the transition temperature: the appearance of such...
A high order feedback net (HOFNET) with variable non-linearity (1991)
Selviah, D.R., Mao, Z.Q., Midwinter, J.E.
Most neural networks proposed for pattern recognition sample the incoming image at one instant and then analyse it. This means that the data to be analysed is limited to that containing the noise...
Test of octupole coupled 5- state in 146Nd using proton inelastic scattering (1991)
Cottle, P. D., Kennedy, M. A., Kemper, K. W., Brown, J. D., Jacobsen, E. R., Sharon, Y. Y., ...
The inelastic scattering of 35 MeV protons has been used to excite seven states below 2.1 MeV in 146Nd. A comparison between a coupled-channels calculation that assumes an octupole coupled structure...
Test of octupole coupled 5- state in 146Nd using proton inelastic scattering (1991)
Cottle, P. D., Kennedy, M. A., Kemper, K. W., Brown, J. D., Jacobsen, E. R., Sharon, Y. Y., ...
The inelastic scattering of 35 MeV protons has been used to excite seven states below 2.1 MeV in 146Nd. A comparison between a coupled-channels calculation that assumes an octupole coupled structure...
Holographic high order associative memory system (1991)
Mao, Z.Q., Selviah, D.R., Tao, S., Midwinter, J.E.
The authors have demonstrated the use of two dimensional arrays of Fourier Transform holograms in an opto-electronic implementation of a high order feedback net (HOFNET). The nonlinearity in this net...
Opto-electronic high order feedback neural network (1990)
Selviah, D.R., Mao, Z.Q., Midwinter, J.E.
A novel neural network design, in which nonlinearities are created by feedback, is described. It is called the HOFNET. The design is suitable for optical implementation because it is tolerant of the...