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...
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...
Itinerant Ferromagnetism and Metamagnetism in Cr Doped Perovskite Ruthenates (2005)
Durairaj, V., Elhami, E., Chikara, S., Lin, X. N., Douglass, A., Schlottmann, G. Cao P., ...
We report results of structural, magnetic and transport properties of single crystal CaRu1-xCrxO3 (0≤x≤0.36) and SrRu1-xCrxO3 (0≤x≤0.30). Cr substitution as low as x=0.08...
Magnetic, electronic and Shubnikov-de Haas investigation of the dense Kondo system CeAgSb2 (2005)
Jobiliong, E., Brooks, J. S., Choi, E. S., Lee, Han-Oh, Fisk, Z.
Of the dense Kondo materials in the class CeTSb2 (where T = Au, Ag, Ni, Cu, or Pd), CeAgSb2 is special due to its complex magnetic ground state, which exhibits both ferro- and anti-ferromagnetic...
Magnetic Field Dependence of CDW Phases in Per2M(mnt)2 (M=Pt, Au) (2005)
Brooks, J. S., Graf, D., Choi, E. S., Almeida, M., Dias, J. C., Henriques, R. T., ...
Recently the authors discovered that the suppression of the charge density wave (CDW) ground states by high magnetic fields in the organic conductor series Per2M(mnt)2 is followed by additional high...
Magnetic Field Dependent Behavior of the CDW ground state in Per2M(mnt)2 (M = Au, Pt) (2005)
Brooks, J. S., Graf, D., Choi, E. S., Almeida, M., Dias, J. C., Henriques, R. T., ...
The Per2M(mnt)2 class of organic conductors exhibit a charge density wave (CDW) ground state below about 12 K, which may be suppressed in magnetic fields of order 20 to 30 T. However, for both cases...
Choi, E. S., Brooks, J. S., Kang, H., Jo, Y. J., Kang, W.
We examine an unusual phenomenon where, in tilted magnetic fields near magic angles parallel to crystallographic planes, a "giant" resonant Nernst signal has been observed by Wu et al.[Phys. Rev....
Graf, D., Choi, E. S., Brooks, J. S., Harrison, N., Murata, K., Konoike, T., ...
We have investigated the magnetic field-induced metal-insulator transition in the tau-phase organic conductors, which occurs in fields above 35 T, and below 14 K, by magnetization, thermoelectric,...
Graf, D., Choi, E. S., Brooks, J. S., Henriques, Rui T., Almeida, M., Matos, M.
We have measured the high field magnetoresistence and magnetization of quasi-one- dimensional (Q1D) organic conductor (Per)2Pt(mnt)2 (where Per = perylene and mnt = maleonitriledithiolate), which has...
Brooks,J.S., Uji,S., Choi,E.S., Rutel,I.B., Kobayashi,H., Kobayashi,A., ...
Alloy studies in the p - d organic conductor l-(BETS)2Fe xGa1-xCl4 have given new insight into the nature of field induced superconductivity (FISC), since the mechanism of the FISC involves...
Graf, D., Brooks, J. S., Choi, E. S., Uji, S., Dias, J. C., Almeida, M., ...
The charge density wave (CDW) transition temperature in the quasi-one dimensional (Q1D) organic material of (Per)$_2$Au(mnt)$_2$ is relatively low (TCDW = 12 K). Hence in a mean field BCS model, the...
North, J. M., Zipse, D., Dalal, N. S., Choi, E. S., Jobiliong, E., Brooks, J. S., ...
Resistivity measurements are reported for single crystals of Mn12-Acetate and Fe8Br8. Both materials exhibit a semiconductor-like, thermally activated behavior over the 200-300 K range. The...
North, J. M., Zipse, D., Dalal, N. S., Choi, E. S., Jobiliong, E., Brooks, J. S., ...
Resistivity measurements are reported for single crystals of Mn$_{12}$-Acetate and Fe$_8$Br$_8$. Both materials exhibit a semiconductor-like, thermally activated behavior over the 200-300 K range....
High magnetic field-induced insulating phase in an organic conductor (2002)
Brooks, J. S., Graf, D., Choi, E. S., Balicas, L., Storr, K., Mielke, C. H., ...
We report electrical transport, skin depth, and magnetocaloric measurements in the tau-series of organic conductors at very high magnetic fields. Above 36 T these materials show a magnetic field...
Choi, E. S., Jobiling, E., Wade, A., Goetz, E., Brooks, J. S., Yamada, J., ...
The quantum oscillatory effect and superconductivity in a non-tetrachalcogenafulvalene (TCF) structure based organic superconductor beta-(BDA-TTP)_2SbF_6 are studied. Here the Shubnikov-de Haas...
Thermoelectric power of MgB$_{2-x}$Be$_x$ (2002)
Ahn, J. S., Choi, E. S., Kang, W., Singh, D. J., Choi, E. J.
We investigated thermoelectric power $S(T)$ of MgB$_{2-x}$Be$_{x}$ ($x=0$, 0.2, 0.3, 0.4, and 0.6). $S(T)$ decreases systematically with $x$, suggesting that the hole density increases. Our band...
Choi, E. S., Brooks, J. S., Qualls, J. S.
We have used a low-frequency magneto-thermopower (MTEP) method to probe the high magnetic field ground state behavior of $\alpha$-(BEDT-TTF)$_2$KHg(SCN)$_4$ along all three principal crystallographic...
Pressure dependent thermoelectric power of MgB$_2$ superconductor (2001)
Choi, E. S., Kang, W., Kim, J. Y., Park, Min-Seok, Jung, C. U., Kim, Heon-Jung, ...
We have measured temperature dependence of thermoelectric power (TEP) on MgB$_2$ superconductor under hydrostatic pressure. The sign and temperature dependence of TEP shows metallic hole carriers are...
Choi, E. S., Brooks, J. S., Qualls, J. S., Song, Y. S.
We describe an AC method for the measurement of the longitudinal (Sxx) and transverse (Sxy, i.e. Nernst) thermopower of mm-size single crystal samples at low temperatures (T30 T). A low-frequency (33...
Choi, E. S., Brooks, J. S., Han, S. Y., Balicas, L., Qualls, J. S.
We have employed uniaxial stress along the principal axes of the quasi-two dimensional organic superconductor $\kappa $--(BEDT-TTF)$_{2}$Cu(SCN)$_{2}$. The lattice anisotropy is thereby altered, with...
Electronic transport in carbon-nanotube ropes and mats. (1999)
Kaiser, A. B., Park, Y. W., Kim, G. T., Choi, E. S., Düsberg, G., Roth, S.
Metallic temperature dependence of resistivity in perchlorate doped polyacetylene (1998)
Park, Y. W., Choi, E. S., Suh, D. S.
We have measured the electrical resistivity ($\rho$) and the thermoelectric power (TEP) of the perchlorate (ClO4^-) doped stretch oriented polyacetylene (PA) film. For the highly conducting samples...
Sohn, J H, Choi, E S, Kim, C H, Agaphonov, M O, Ter-Avanesyan, M D, Rhee, J S, ...
Several autonomously replicating sequences of Hansenula polymorpha DL-1 (HARSs) with the characteristics of tandem integration were cloned by an enrichment procedure and analyzed for their functional...
Menon, N K, Robbins, J, Peck, H D, Chatelus, C Y, Choi, E S, Przybyla, A E
DNA encompassing the structural genes of an Escherichia coli [NiFe] hydrogenase has been cloned and sequenced. The genes were identified as those encoding the large and small subunits of hydrogenase...
Voordouw, G, Menon, N K, LeGall, J, Choi, E S, Peck, H D, Przybyla, A E
The nucleotide sequences encoding the [NiFe] hydrogenase from Desulfovibrio gigas and the [NiFeSe] hydrogenase from Desulfovibrio baculatus (N.K. Menon, H.D. Peck, Jr., J. LeGall, and A.E. Przybyla,...
Sohn, J H, Choi, E S, Kim, C H, Agaphonov, M O, Ter-Avanesyan, M D, Rhee, J S, ...
Several autonomously replicating sequences of Hansenula polymorpha DL-1 (HARSs) with the characteristics of tandem integration were cloned by an enrichment procedure and analyzed for their functional...
Menon, N K, Robbins, J, Peck, H D, Chatelus, C Y, Choi, E S, Przybyla, A E
DNA encompassing the structural genes of an Escherichia coli [NiFe] hydrogenase has been cloned and sequenced. The genes were identified as those encoding the large and small subunits of hydrogenase...
Voordouw, G, Menon, N K, LeGall, J, Choi, E S, Peck, H D, Przybyla, A E
The nucleotide sequences encoding the [NiFe] hydrogenase from Desulfovibrio gigas and the [NiFeSe] hydrogenase from Desulfovibrio baculatus (N.K. Menon, H.D. Peck, Jr., J. LeGall, and A.E. Przybyla,...
Augmented pulmonary IL-4 and IL-13 receptor subunit expression in idiopathic interstitial pneumonia
Jakubzick, C, Choi, E S, Kunkel, S L, Evanoff, H, Martinez, F J, Puri, R K, ...
Background: Some idiopathic interstitial pneumonias (IIPs) are characterised by fibroproliferation and deposition of extracellular matrix. Because efficacious treatment options are limited, research...