Now showing items 21-40 of 757

    • Wafer-scale monodomain films of spontaneously aligned single-walled carbon nanotubes 

      He, Xiaowei; Gao, Weilu; Xie, Lijuan; Li, Bo; Zhang, Qi; Lei, Sidong; Robinson, John M.; Hároz, Erik H.; Doorn, Stephen K.; Wang, Weipeng; Vajtai, Robert; Ajayan, Pulickel M.; Adams, W. Wade; Hauge, Robert H.; Kono, Junichiro (2016)
      The one-dimensional character of electrons, phonons and excitons in individual single-walled carbon nanotubes leads to extremely anisotropic electronic, thermal and optical properties. However, despite significant efforts ...
    • Charge Transfer Plasmons: Optical Frequency Conductances and Tunable Infrared Resonances 

      Wen, Fangfang; Zhang, Yue; Gottheim, Samuel; King, Nicholas S.; Zhang, Yu; Nordlander, Peter; Halas, Naomi J. (2015)
      A charge transfer plasmon (CTP) appears when an optical-frequency conductive pathway between two metallic nanoparticles is established, enabling the transfer of charge between nanoparticles when the plasmon is excited. ...
    • Distinguishing between plasmon-induced and photoexcited carriers in a device geometry 

      Zheng, Bob Y.; Zhao, Hangqi; Manjavacas, Alejandro; McClain, Michael; Nordlander, Peter (2015)
      The use of surface plasmons, charge density oscillations of conduction electrons of metallic nanostructures, to boost the efficiency of light-harvesting devices through increased light-matter interactions could drastically ...
    • Natural supersymmetry, muon g−2, and the last crevices for the top squark 

      Padley, B. Paul; Sinha, Kuver; Wang, Kechen (2015)
      We study the interplay of natural supersymmetry and a supersymmetric solution to the discrepancy observed in measurements of the muon magnetic moment. The strongest constraints on the parameter space currently come from ...
    • Experimental observation of incoherent-coherent crossover and orbital-dependent band renormalization in iron chalcogenide superconductors 

      Liu, Z.K.; Yi, M.; Zhang, Y.; Hu, J.; Yu, R.; Zhu, J.-X.; He, R.-H.; Chen, Y.L.; Hashimoto, M.; Moore, R.G.; Mo, S.-K.; Hussain, Z.; Si, Q.; Mao, Z.Q.; Lu, D.H.; Shen, Z.-X. (2015)
      The level of electronic correlation has been one of the key questions in understanding the nature of superconductivity. Among the iron-based superconductors, the iron chalcogenide family exhibits the strongest electron ...
    • Point-contact tunneling spectroscopy measurement of CuxTiSe2: Disorder-enhanced Coulomb effects 

      Luna, Katherine; Wu, Phillip M.; Chen, Justin S.; Morosan, Emilia; Beasley, Malcolm R. (2015)
      We performed point-contact spectroscopy tunneling measurements on CuxTiSe2 bulk with x=0.02 and 0.06 at temperatures ranging from T=4−40 K and observe a suppression in the density of states around zero bias that we attribute ...
    • Depinning transition of bubble phases in a high Landau level 

      Wang, Xuebin; Fu, Hailong; Du, Lingjie; Liu, Xiaoxue; Wang, Pengjie; Pfeiffer, L.N.; West, K.W.; Du, Rui-Rui; Lin, Xi (2015)
      In the higher Landau levels (N>0) a reentrant integer quantum Hall effect (RIQHE) state, which resides at fractional filling factors but exhibits integer Hall plateaus, has been previously observed and studied extensively. ...
    • Neutron spin resonance as a probe of superconducting gap anisotropy in partially detwinned electron underdoped NaFe0.985Co0.015As 

      Zhang, Chenglin; Park, J.T.; Lu, Xingye; Yu, Rong; Li, Yu; Zhang, Wenliang; Zhao, Yang; Lynn, J.W.; Si, Qimiao; Dai, Pengcheng (2015)
      We use inelastic neutron scattering (INS) to study the spin excitations in partially detwinned NaFe0.985Co0.015As which has coexisting static antiferromagnetic (AF) order and superconductivity (Tc=15 K, TN=30 K). In previous ...
    • Pairing correlations near a Kondo-destruction quantum critical point 

      Pixley, J.H.; Deng, Lili; Ingersent, Kevin; Si, Qimiao (2015)
      Motivated by the unconventional superconductivity observed in heavy-fermion metals, we investigate pairing susceptibilities near a continuous quantum phase transition of the Kondo-destruction type. We solve two-impurity ...
    • Doping evolution of antiferromagnetism and transport properties in nonsuperconducting BaFe2−2xNixCrxAs2 

      Zhang, Rui; Gong, Dongliang; Lu, Xingye; Li, Shiliang; Laver, Mark; Niedermayer, Christof; Danilkin, Sergey; Deng, Guochu; Dai, Pengcheng; Luo, Huiqian (2015)
      We report elastic neutron scattering and transport measurements on the Ni and Cr equivalently doped iron pnictide BaFe2−2xNixCrxAs2. Compared with the electron-doped BaFe2−xNixAs2, the long-range antiferromagnetic (AF) ...
    • Cluster extended dynamical mean-field approach and unconventional superconductivity 

      Pixley, J.H.; Cai, Ang; Si, Qimiao (2015)
      The extended dynamical mean-field theory has played an important role in the study of quantum phase transitions in heavy-fermion systems. In order to incorporate the physics of unconventional superconductivity, we develop ...
    • Implications of the hybrid epithelial/mesenchymal phenotype in metastasis 

      Jolly, Mohit Kumar; Boareto, Marcelo; Huang, Bin; Jia, Dongya; Lu, Mingyang; Ben-Jacob, Eshel; Onuchic, José N.; Levine, Herbert (2015)
      Transitions between epithelial and mesenchymal phenotypes - the epithelial to -mesenchymal transition (EMT) and its reverse the mesenchymal to epithelial transition (MET) - are hallmarks of cancer metastasis. While ...
    • Coupling the modules of EMT and stemness: A tunable ‘stemness window’ model 

      Jolly, Mohit Kumar; Jia, Dongya; Boareto, Marcelo; Mani, Sendurai A.; Pienta, Kenneth J.; Ben-Jacob, Eshel; Levine, Herbert (2015)
      Metastasis of carcinoma involves migration of tumor cells to distant organs and initiate secondary tumors. Migration requires a complete or partial Epithelial-to-Mesenchymal Transition (EMT), and tumor-initiation requires ...
    • An itinerant antiferromagnetic metal without magnetic constituents 

      Svanidze, E.; Wang, Jiakui K.; Besara, T.; Liu, L.; Huang, Q.; Siegrist, T.; Frandsen, B.; Lynn, J.W.; Nevidomskyy, Andriy H.; Gamża, Monika B.; Aronson, M.C.; Uemura, Y.J.; Morosan, E. (2015)
      The origin of magnetism in metals has been traditionally discussed in two diametrically opposite limits: itinerant and local moments. Surprisingly, there are very few known examples of materials that are close to the ...
    • High e+/e− Ratio Dense Pair Creation with 1021W.cm−2 Laser Irradiating Solid Targets 

      Liang, E.; Clarke, T.; Henderson, A.; Fu, W.; Lo, W.; Taylor, D.; Chaguine, P.; Zhou, S.; Hua, Y.; Cen, X.; Wang, X.; Kao, J.; Hasson, H.; Dyer, G.; Serratto, K.; Riley, N.; Donovan, M.; Ditmire, T. (2015)
      We report results of new pair creation experiments using ~100 Joule pulses of the Texas Petawatt Laser to irradiate solid gold and platinum targets, with intensities up to ~1.9 × 10(21) W.cm(-2) and pulse durations as short ...
    • Defining and resolving current systems in geospace 

      Ganushkina, N.Y.; Liemohn, M.W.; Dubyagin, S.; Daglis, I.A.; Dandouras, I.; De Zeeuw, D.L.; Ebihara, Y.; Ilie, R.; Katus, R.; Kubyshkina, M.; Milan, S.E.; Ohtani, S.; Ostgaard, N.; Reistad, J.P.; Tenfjord, P.; Toffoletto, F.; Zaharia, S.; Amariutei, O. (2015)
      Electric currents flowing through near-Earth space (R≤12RE) can support a highly distorted magnetic field topology, changing particle drift paths and therefore having a nonlinear feedback on the currents themselves. A ...
    • Geometrical Frustration in Interleukin-33 Decouples the Dynamics of the Functional Element from the Folding Transition State Ensemble 

      Fisher, Kaitlin M.; Haglund, Ellinor; Noel, Jeffrey K.; Hailey, Kendra L.; Onuchic, José N.; Jennings, Patricia A. (2015)
      Interleukin-33 (IL-33) is currently the focus of multiple investigations into targeting pernicious inflammatory disorders. This mediator of inflammation plays a prevalent role in chronic disorders such as asthma, rheumatoid ...
    • Modeling the Transitions between Collective and Solitary Migration Phenotypes in Cancer Metastasis 

      Huang, Bin; Jolly, Mohit Kumar; Lu, Mingyang; Tsarfaty, Ilan; Ben-Jacob, Eshel; Onuchic, José N. (2015)
      Cellular plasticity during cancer metastasis is a major clinical challenge. Two key cellular plasticity mechanisms —Epithelial-to-Mesenchymal Transition (EMT) and Mesenchymal-to-Amoeboid Transition (MAT) – have been carefully ...
    • Topological Weyl superconductor to diffusive thermal Hall metal crossover in the B phase of UPt3 

      Goswami, Pallab; Nevidomskyy, Andriy H. (2015)
      The recent phase-sensitive measurements in the superconducting B phase of UPt3 provide strong evidence for the triplet, chiral kz(kx±iky)2 pairing symmetries, which endow the Cooper pairs with orbital angular momentum ...
    • Energy dependence of the spin excitation anisotropy in uniaxial-strained BaFe1.9Ni0.1As2 

      Song, Yu; Lu, Xingye; Abernathy, D.L.; Tam, David W.; Niedziela, J.L.; Tian, Wei; Luo, Huiqian; Si, Qimiao; Dai, Pengcheng (2015)
      We use inelastic neutron scattering to study the temperature and energy dependence of the spin excitation anisotropy in uniaxial-strained electron-doped iron pnictide BaFe1.9Ni0.1As2 near optimal superconductivity (Tc=20K). ...