Simon, F., Dora, B., Muranyi, F., Janossy, A., Garaj, S., Forro, L., ...
The temperature dependence of the electron spin relaxation time in MgB2 is anomalous as it does not follow the temperature dependence of the resistivity above 150 K, it has a maximum around 400 K,...
Evidence for the band broadening across the ferromagnetic transition in Cr$_{1/3}$NbSe$_2$ (2008)
Hu, W. Z., Wang, G. T., Hu, Rongwei, Petrovic, C., Morosan, E., ...
The electronic structure of Cr$_{1/3}$NbSe$_2$ is studied via optical spectroscopy. We observe two low-energy interband transitions in the paramagnetic phase, which split into four peaks as the...
Giant Carrier Mobility in Single Crystals of FeSb2 (2008)
Hu, Rongwei, Mitrovic, V. F., Petrovic, C.
We report the giant carrier mobility in single crystals of FeSb2. Nonlinear field dependence of Hall resistivity is well described with the two-carrier model. Maximum mobility values in high mobility...
Composition and field tuned magnetism and superconductivity in Nd1-xCexCoIn5 (2008)
Hu, Rongwei, Lee, Y., Hudis, J., Mitrovic, V. F., Petrovic, C.
The Nd1-xCexCoIn5 alloys evolve from local moment magnetism (x = 0) to heavy fermion superconductivity (x =1). Magnetic order is observed over a broad range of x. For a substantial range of x (0.83
Anisotropy of Electrical Transport and Superconductivity in Metal Chains of Nb2Se3 (2008)
Hu, Rongwei, Lauritch-Kullas, K., Brian, J. O, Mitrovic, V. F., Petrovic, C.
In this work we have shown bulk superconductivity and studied the anisotropy in both the normal and superconducting states in quasi-1D conductor Nb2Se3. Electron - electron Umklapp scattering...
Weak Ferromagnetism in Fe1-xCoxSb2 (2008)
Hu, Rongwei, Hermann, R. P., Grandjean, F., Lee, Y., Warren, J. B., Mitrovic, V. F., ...
Weak ferromagnetism in Fe1-xCoxSb2 is studied by magnetization and Mossbauer measurements. A small spontaneous magnetic moment of the order of 10^-3 uB appears along the b-axis for 0.2
Anisotropy in magnetic and transport properties of Fe1-xCoxSb2 (2008)
Hu, Rongwei, Mitrovic, V. F., Petrovic, C.
Anisotropic magnetic and electronic transport measurements were carried out on large single crystals of Fe1-xCoxSb2 (0
Anisotropy in the magnetic and electrical transport properties of Fe1-xCrxSb2 (2008)
Hu, Rongwei, Mitrovic, V. F., Petrovic, C.
We have investigated anisotropy in magnetic and electrical transport properties of Fe1-xCrxSb2 (0
Colossal Positive Magnetoresistance in a Doped Nearly Magnetic Semiconductor (2008)
Hu, Rongwei, Thomas, K. J., Lee, Y., Vogt, T., Choi, E. S., Mitrovic, V. F., ...
We report on a positive colossal magnetoresistance (MR) induced by metallization of FeSb$_{2}$, a nearly magnetic or "Kondo" semiconductor with 3d ions. We discuss contribution of orbital MR and...
Superfluid density in gapless superconductor CeCoIn5 (2007)
Kogan, V. G., Prozorov, R., Petrovic, C.
Temperature dependence of the London penetration depth $\lambda$ measured in single crystals of CeCoIn$_5$ is interpreted as caused by a strong pair-breaking scattering that makes the...
Ambient-pressure bulk superconductivity deep in the magnetic state of CeRhIn5 (2007)
Paglione, Johnpierre, Maple, M. B., Tanatar, M. A., Taillefer, Louis, Lee, Y., ...
Specific heat, magnetic susceptibility and electrical transport measurements were performed at ambient pressure on high-quality single crystal specimens of CeRhIn5 down to ultra-low temperatures. We...
Spin resonance in the d-wave superconductor CeCoIn5 (2007)
Stock, C., Broholm, C., Hudis, J., Kang, H. J., Petrovic, C.
Neutron scattering is used to probe antiferromagnetic spin fluctuations in the d-wave heavy fermion superconductor CeCoIn$_{5}$ (T$_{c}$=2.3 K). Superconductivity develops from a state with slow...
The Lorenz number in CeCoIn$_5$ inferred from the thermal and charge Hall currents (2007)
Onose, Y., Ong, N. P., Petrovic, C.
The thermal Hall conductivity $\kappa_{xy}$ and Hall conductivity $\sigma_{xy}$ in CeCoIn$_5$ are used to determine the Lorenz number ${\cal L}_H$ at low temperature $T$. This enables the separation...
Onose, Y., Li, Lu, Petrovic, C., Ong, N. P.
The heavy-electron superconductor CeCoIn$_5$ exhibits a puzzling precursor state above its superconducting critical temperature at $T_c$ = 2.3 K. The thermopower and Nernst signal are anomalous....
Conduction electron spin-lattice relaxation time in the MgB2 superconductor (2007)
Simon, F., Murányi, F., Fehér, T., Jánossy, A., Forró, L., Petrovic, C., ...
The spin-lattice relaxation time, $T_{1}$, of conduction electrons is measured as a function of temperature and magnetic field in MgB$_2$. The method is based on the detection of the $z$ component of...
Thermal-Hall conductivity and long-lived quasiparticles in CeCoIn$_5$ (2006)
Onose, Y., Ong, N. P., Petrovic, C.
In CeCoIn$_5$, the thermal conductivity $\kappa_{xx}$ and Hall conductivity $\kappa_{xy}$ below $T_c$ display large anomalies below $T_c$. The strong suppression of the anomalies in weak fields...
Hybrid gap structure in the heavy-fermion superconductor CeIrIn$_5$ (2006)
Shakeripour, H., Tanatar, M. A., Li, S. Y., Taillefer, Louis, Petrovic, C.
The thermal conductivity $\kappa$ of the heavy-fermion superconductor CeIrIn$_5$ was measured as a function of temperature down to $T_c$/8, for current directions perpendicular ($J \parallel a$) and...
Field Dependent Coherence Length in the Superclean, High-Kappa Superconductor CeCoIn5 (2006)
DeBeer-Schmitt, L., Dewhurst, C. D., Hoogenboom, B. W., Petrovic, C., Eskildsen, M. R.
Using small-angle neutron scattering, we have studied the flux-line lattice (FLL) in superconducting CeCoIn5. The FLL is found to undergo a first-order symmetry and reorientation transition at ~0.55...
Nonvanishing Energy Scales at the Quantum Critical Point of CeCoIn5 (2006)
Paglione, Johnpierre, Tanatar, M. A., Hawthorn, D. G., Ronning, F., Hill, R. W., Sutherland, M., ...
Heat and charge transport were used to probe the magnetic field-tuned quantum critical point in the heavy-fermion metal CeCoIn$_5$. A comparison of electrical and thermal resistivities reveals three...
Optical investigation of the metal-insulator transition in $FeSb_2$ (2005)
Perucchi, A., Degiorgi, L., Hu, R., Petrovic, C., Mitrovi{ć}, V.
We present a comprehensive optical study of the narrow gap $FeSb_2$ semiconductor. From the optical reflectivity, measured from the far infrared up to the ultraviolet spectral range, we extract the...
Kondo Insulator description of spin state transition in FeSb2 (2005)
Petrovic, C., Lee, Y., Vogt, T., Lazarov, N. Dj., Bud'ko, S. L., Canfield, P. C.
The thermal expansion and heat capacity of FeSb2 at ambient pressure agrees with a picture of a temperature induced spin state transition within the Fe t_{2g} multiplet. However, high pressure powder...
Unpaired Electrons in the Heavy-Fermion Superconductor CeCoIn_{5} (2005)
Tanatar, M. A., Paglione, Johnpierre, Nakatsuji, S., Hawthorn, D. G., Boaknin, E., Hill, R. W., ...
Thermal conductivity and specific heat were measured in the superconducting state of the heavy fermion material Ce_{1-x}La_{x}CoIn_{5}. With increasing impurity concentration x, the suppression of...
Rourke, P. M. C., Tanatar, M. A., Turel, C. S., Berdeklis, J., Petrovic, C., Wei, J. Y. T.
Point-contact spectroscopy was performed on single crystals of the heavy-fermion superconductor CeCoIn_5 between 150 mK and 2.5 K. A pulsed measurement technique ensured minimal Joule heating over a...
Paglione, Johnpierre, Tanatar, M. A., Hawthorn, D. G., Hill, R. W., Ronning, F., Sutherland, M., ...
Heat and charge conduction were measured in the heavy-fermion metal CeRhIn5, an antiferromagnet with T_N=3.8 K. The thermal resistivity is found to be proportional to the magnetic entropy, revealing...
Field-induced quantum critical point in CeCoIn_5 (2003)
Paglione, Johnpierre, Tanatar, M. A., Hawthorn, D. G., Boaknin, Etienne, Hill, R. W., Ronning, F., ...
The resistivity of CeCoIn_5 was measured down to 20 mK in magnetic fields of up to 16 T. With increasing field, we observe a suppression of the non-Fermi liquid behavior, rho~T, and the development...
Simon, F., Janossy, A., Feher, T., Muranyi, F., Garaj, S., Forro, L., ...
The magnetic field dependence of the spin-susceptibility, $\chi_{s}$ was measured in the superconducting state of high purity MgB$_{2}$ fine powders below 1.3 T. $\chi_{s}$ was determined from the...
Field-Induced Quantum Critical Point in CeCoIn5 (2002)
Paglione, Johnpierre, Tanatar, M. A., Hawthorn, D. G., Boaknin, Etienne, Hill, R. W., Ronning, F., ...
The resistivity of the heavy-fermion superconductor CeCoIn5 was measured as a function of temperature, down to 25 mK and in magnetic fields of up to 16 T applied perpendicular to the basal plane....
Ribeiro, R. A., Bud'ko, S. L., Petrovic, C., Canfield, P. C.
By synthesizing MgB$_{2}$ using boron of different nominal purity we found values of the residual resistivity ratio ($RRR = R(300 K) / R(42 K)$) from 4 to 20, which covers almost all values found in...
Hexagonal and Square Flux Line Lattices in CeCoIn5 (2002)
Eskildsen, M. R., Dewhurst, C. D., Hoogenboom, B. W., Petrovic, C., Canfield, P. C.
Using small-angle neutron scattering, we have imaged the magnetic flux line lattice (FLL) in the d-wave heavy-fermion superconductor CeCoIn5. At low fields we find a hexagonal FLL. Around 0.6 T this...
Synthesis and Properties of YbB2 (2002)
Avila, M. A., Bud'ko, S. L., Petrovic, C., Ribeiro, R. A., Canfield, P. C., Tsvyashchenko, A. V., ...
We report temperature and field dependent measurements of the magnetic susceptibility, specific heat and resistivity of sintered YbB2 pellets, prepared via two distinct reaction routes, utilizing...
Carbon doping of superconducting magnesium diboride (2002)
Ribeiro, R. A., Bud'ko, S. L., Petrovic, C., Canfield, P. C.
We present details of synthesis optimization and physical properties of nearly single phase carbon doped MgB2 with a nominal stoichiometry of Mg(B{0.8}C{0.2})2 synthesized from magnesium and boron...
Anisotropy and large magnetoresistance in narrow gap semiconductor FeSb2 (2002)
Petrovic, C., Kim, J. W., Bud'ko, S. L., Goldman, A. I., Canfield, P. C., Choe, W., ...
A study of the anisotropy in magnetic, transport and magnetotransport properties of FeSb2 has been made on large single crystals grown from Sb flux. Magnetic susceptibility of FeSb2 shows diamagnetic...
Ribeiro, R. A., Bud`ko, S. L., Petrovic, C., Canfield, P. C.
We present a study of the effects of non-stoichiometry, boron purity, wire diameter and post-synthesis treatment (etching and Mg distilling) on the temperature dependent resistance and resistivity of...
Effects of La substitution on superconducting state of CeCoIn5 (2002)
Petrovic, C., Bud'ko, S. L., Kogan, V. G., Canfield, P. C.
We report effects of La substitution on superconducting state of heavy fermion superconductor CeCoIn5, as seen in transport and magnetization measurements. As opposed to the case of conventional...
Magnetism and superconductivity in Ce_2RhIn_8 (2002)
Nicklas, M., Sidorov, V. A., Borges, H. A., Pagliuso, P. G., Petrovic, C., Fisk, Z., ...
We report the discovery of pressure-induced superconductivity, with T_c=2 K, in the heavy-fermion antiferromagnet Ce_2RhIn_8, where superconductivity and magnetic order coexist over an extended...
Unusual kondo behavior in the indium-rich heavy fermion antiferromagnet Ce3Pt4In13 (2001)
Hundley, M. F., Sarrao, J. L., Thompson, J. D., Movshovich, R., Jaime, M., Petrovic, C., ...
We report the thermodynamic, magnetic, and electronic transport properties of the new ternary intermetallic system (Ce,La)3Pt4In13. Ce3Pt4In13 orders antiferromagnetically at 0.95 K while the...
Anisotropy of superconducting MgB2 as seen in electron spin resonance and magnetization data (2001)
Simon, F., Janossy, A., Feher, T., Muranyi, F., Garaj, S., Forro, L., ...
We have observed the conduction electron spin resonance (CESR) in fine powders of MgB2 both in the superconducting and normal states. The Pauli susceptibility is chi_s=2.0*10^{-5} emu/mole in the...
Anomalous Superconducting Properties and Field Induced Magnetism in CeCoIn5 (2001)
Murphy, T. P., Hall, Donavan, Palm, E. C., Tozer, S. W., Petrovic, C., Fisk, Z., ...
In the heavy fermion superconductor CeCoIn5 (Tc=2.3K) the critical field is large, anisotropic and displays hysteresis. The magnitude of the critical-field anisotropy in the a-c plane can be as large...
Superconducting MgB2 thin films by pulsed laser deposition (2001)
Shinde, S. R., Ogale, S. B., Greene, R. L., Venkatesan, T., Canfield, P. C., Budko, S. L., ...
Growth of MgB2 thin films by pulsed laser deposition is examined under ex situ and in situ processing conditions. For the ex situ process, Boron films grown by PLD were annealed at 900 C with excess...
Synthesis and Processing of $MgB_2$ powders and wires (2001)
Cunningham, C. E., Petrovic, C., Lapertot, G., Bud'ko, S. L., Laabs, F., Straszheim, W., ...
Sintered powders and wires of superconducting $MgB_2$ have been fabricated under a variety of conditions in order to determine details of the diffusion of the $Mg$ into $B$ and to study the types of...
Heavy-fermion superconductivity in CeCoIn5 at 2.3K (2001)
Petrovic, C., Pagliuso, P. G., Hundley, M. F., Movshovich, R., Sarrao, J. L., Thompson, J. D., ...
We report the observation of heavy-fermion superconducitivity in CeCoIn5 at Tc =2.3 K. When compared to the pressure-induced Tc of its cubic relative CeIn3 (Tc ~200 mK), the Tc of CeCoIn5 is...
Magnetoresistivity and Complete $H_{c2}(T)$ in $MgB_2$ (2001)
Bud'ko, S. L., Petrovic, C., Lapertot, G., Cunningham, C. E., Canfield, P. C., Jung, M-H., ...
Detailed magneto-transport data on dense wires of $MgB_2$ are reported for applied magnetic fields up to 18 T. The temperature and field dependencies of the electrical resistivity are consistent with...
Superconductivity in Dense $MgB_2$ Wires (2001)
Canfield, P. C., Finnemore, D. K., Bud'ko, S. L., Ostenson, J. E., Lapertot, G., Cunningham, C. E., ...
$MgB_2$ becomes superconducting just below 40 K. Whereas porous polycrystalline samples of $MgB_2$ can be synthesized from boron powders, in this letter we demonstrate that dense wires of $MgB_2$ can...
Boron Isotope Effect in Superconducting MgB$_2$ (2001)
Bud'ko, S. L., Lapertot, G., Petrovic, C., Cunningham, C. E., Anderson, N., Canfield, P. C.
We report the preparation method of, and boron isotope effect for MgB$_2$, a new binary intermetallic superconductor with a remarkably high superconducting transition temperature $T_c$($^{10}$B) =...
Superconductivity and Magnetism in a New Class of Heavy-Fermion Materials (2000)
Thompson, J. D., Movshovich, R., Fisk, Z., Bouguet, F., Curro, N. J., Fisher, R. A., ...
We report a new family of Ce-based heavy-fermion compounds whose electronic specific heat coefficients range from about 400 to over 700 mJ/mole Ce-K2. Crystal in this family form as CenTmIn3n+2m,...
A New Heavy-Fermion Superconductor CeIrIn5: Relative of the Cuprates? (2000)
Petrovic, C., Movshovich, R., Jaime, M., Pagliuso, P. G., Hundley, M. F., Sarrao, J. L., ...
CeIrIn5 is a member of a new family of heavy-fermion compounds and has a Sommerfeld specific heat coefficient of 720 mJ/mol-K2. It exhibits a bulk, thermodynamic transition to a superconducting state...
Movshovich, R., Jaime, M., Thompson, J. D., Petrovic, C., Fisk, Z., Pagliuso, P. G., ...
Low temperature specific heat and thermal conductivity measurements on the ambient pressure heavy fermion superconductors CeIrIn5 and CeCoIn5 reveal power law temperature dependences of these...
Evaluation of Low Melting Halide Systems for Battery Applications. (1998)
This program involved evaluation of selected low temperature molten salt solvent systems containing inorganic and/or organic chlorides and bromides for battery applications. The research involved...
ULTRAVIOLET ABSORPTION SPECTRA OF HALIDE IONS IN SOLUTION (1975)
$^{1}$J. Franck and R. Platzman, Farkas Memorial Volume, Weizmann Press, Jerusalem (1952); Z. Phys. 138, 411 (1954). $^{2}$G. Stein and A. Treinin, Trans. Faraday Soc. 55, 1086 (1959). $^{3}$C. K,...