Wang, X. F., Wu, T., Wu, G., Liu, R. H., Chen, H., Xie, Y. L., ...
We study systematically transport, susceptibility and heat capacity for BaFe$_{2-x}$Co$_x$As$_2$ single crystals. In the underdoped region, spin density wave (SDW) transition is observed in both...
Wu, T., Ying, J. J., Wu, G., Liu, R. H., He, Y., Chen, H., ...
The temperature dependence of electron spin resonance (ESR) was studied in the oxypnictide superconductors LaFeAsO$_{1-x}$F$_x$ (x = 0.0 and 0.13). In the samples, the ESR signal indicates that the g...
Liu, R. H., Wu, G., Chen, H., Xie, Y. L., Yan, Y. J., Wu, T., ...
We prepared the samples K$_{1-x}$Ln$_{x}$Fe$_2$As$_2$ (Ln=Sm, Nd and La) with ThCr$_2$Si$_2$-type structure. These samples were characterized by X-ray diffraction, resistivity, susceptibility and...
Superconductivity at 56 K in Samarium-doped SrFeAsF (2008)
Wu, G., Xie, Y. L., Chen, H., Zhong, M., Liu, R. H., Shi, B. C., ...
Here we report discovery of superconductivity at 56 K in nonminal composition $Sr_{1-x}Sm_xFeAsF$ (x=0.5) with ZrCuSiAs-type structure. The $T_c$ is almost the same as the highest superconducting...
Liu, R. H., Wu, T., Wu, G., Chen, H., Wang, X. F., Xie, Y. L., ...
We have studied the effect of isotopic substitution on the superconducting $T_c$ and spin-density wave $T_{SDW}$ in the $SmFeAsO_{1-x}F_x$ by replacing $^{16}O$ with the isotope $^{18}O$, and...
Yin, Yi, Zech, M., Williams, T. L., Wang, X. F., Wu, G., Chen, X. H., ...
High temperature superconductors, materials which conduct electricity without energy loss at practically attainable temperatures, have resisted most attempts at explanation and application for over...
Magnetic phase diagram in Eu$_{1-x}$La$_x$Fe$_2$As$_2$ single crystals (2008)
Wu, T., Wu, G., Chen, H., Xie, Y. L., Liu, R. H., Wang, X. F., ...
We have systematically measured resistivity, susceptibility and specific heat under different magnetic fields (H) in Eu$_{1-x}$La$_x$Fe$_2$As$_2$ single crystals. It is found that a metamagnetic...
Coexistence of the spin-density-wave and superconductivity in the (Ba,K)Fe2As2 (2008)
Chen, H., Ren, Y., Qiu, Y., Bao, Wei, Liu, R. H., Wu, G., ...
The relation between the spin-density-wave (SDW) and superconducting order is a central topic in current research on the FeAs-based high Tc superconductors. Conflicting results exist in the...
Wu, G., Chen, H., Wu, T., Xie, Y. L., Yan, Y. J., Liu, R. H., ...
We report that intrinsic transport and magnetic properties, and their anisotropy from high quality single crystal $CaFe_2As_2$. The resistivity anisotropy ($\rho_c/\rho_{ab}$) is $\sim 50 $, and less...
Thermodynamic properties of Ba1-xMxFe2As2 (M = La and K) (2008)
Dong, J. K., Ding, L., Wang, H., Wang, X. F., Wu, T., Chen, X. H., ...
The specific heat $C(T)$ of BaFe$_2$As$_2$ single crystal, electron-doped Ba$_{0.7}$La$_{0.3}$Fe$_2$As$_2$ and hole-doped Ba$_{0.5}$K$_{0.5}$Fe$_2$As$_2$ polycrystals were measured. For undoped...
Yang, L. X., Zhang, Y., Ou, H. W., Zhao, J. F., Shen, D. W., Zhou, B., ...
The magnetic properties in the parent compounds are often intimately related to the microscopic mechanism of superconductivity. Here we report the first direct measurements on the electronic...
Wang, X. F., Wu, T., Wu, G., Chen, H., Xie, Y. L., Ying, J. J., ...
Sizable single crystals of $BaFe_2As_2$ have been grown with self-flux method. The crystals are plate-like with c-axis perpendicular to the plane. The size can be as large as 3 x 5 x 0.2 $mm^3$. The...
Superconductivity induced by oxygen deficiency in Sr-doped LaOFeAs (2008)
Wu, G., Chen, H., Xie, Y. L., Yan, Y. J., Wu, T., Liu, R. H., ...
We synthesized Sr-doped $La_{0.85}Sr_{0.15}OFeAs$ sample with single phase, and systematically studied the effect of oxygen deficiency in the Sr-doped LaOFeAs system. It is found that substitution of...
Wu, G., Liu, R. H., Chen, H., Yan, Y. J., Wu, T., Xie, Y. L., ...
We synthesized the samples $Ba_{1-x}M_xFe_2As_2$ (M=La and K) with $ThCr_2Si_2$-type structure. These samples were systematically characterized by resistivity, thermoelectic power (TEP) and Hall...
Liu, R. H., Wu, G., Wu, T., Fang, D. F., Chen, H., Li, S. Y., ...
The magnetic fluctuations associated with a quantum critical point (QCP) are widely believed to cause the non-Fermi liquid behaviors and unconventional superconductivities, for example, in heavy...
Combined fluorescent and interferometric detection of protein on a BioCD (2008)
Wang, X. F., Zhao, M., Nolte, D. D.
We perform simultaneous interferometric and fluorescent detection of molecular protein layers on a BioCD. The 488 nm excitation wavelength of fluorescein also provides the interferometric detection...
Molecular interferometric imaging (2008)
Zhao, M., Wang, X. F., Nolte, D. D.
Common-path in-line shearing interferometry, combined with pixel-array imaging, provides a surface metrology that achieves 15 pm surface height resolution. An eighth-wave thermal oxide on silicon...
Common-path interferometric detection of protein monolayer on the BioCD (2007)
Wang, X. F., Zhao, M., Nolte, D. D.
The bio-optical compact disk (BioCD) is an optical biosensor that performs common-path molecular interferometry of patterned proteins on a disk spinning at high speed. The common-path configuration...
Molecular interferometric imaging for biosensor applications (2007)
Zhao, M., Wang, X. F., Lawrence, G. M., Espinoza, P., Nolte, D. D.
Molecular interferometric imaging (MI2) is a common-path interferometric imaging technique for detecting protein binding to surfaces. The experimental metrology limit is 10 pm/pixel longitudinal...
Ballistic spin transport, through periodically stubbed waveguides, is studied in the presence of a weak spin-orbit interaction (SOI) and the resulting subband mixing. By an appropriate choice of the...
Wang, X. F., Vasilopoulos, P., Peeters, F. M.
Two-dimensional (2D) periodic electric modulations of a 2D electron gas split each Landau level into the well-known butterfly-type spectrum described by a Harper-type equation multiplied by an...
Spin-dependent magnetotransport through a ring in the presence of spin-orbit interaction (2006)
The Schr\"{o}dinger equation for an electron in a mesoscopic ring, in the presence of the Rashba and linear Dresselhaus terms of the spin-orbit interaction (SOI) and of a magnetic field $B$, is...
Collective excitations of Dirac electrons in a graphene layer with spin-orbit interaction (2006)
Wang, X. F., Chakraborty, Tapash
Coulomb screening and excitation spectra of electrons in a graphene layer with spin-orbit interaction (SOI) is studied in the random phase approximation. The SOI opens a gap between the valence and...
Charge transfer via a two-strand superexchange bridge in DNA (2006)
Wang, X. F., Chakraborty, Tapash
Charge transfer in a DNA duplex chain is studied by constructing a system with virtual electrodes connected at the ends of each DNA strand. The systeym is described by the tight-binding model and its...
Spin injection into a short DNA chain (2005)
Wang, X. F., Chakraborty, Tapash
Quantun spin transport through a short DNA chain connected to ferromagnetic electrodes has been investigated by the transfer matrix method. We describe the system by a tight-binding model where the...
Plasmon spectrum of two-dimensional electron systems with Rashba spin-orbit interaction (2005)
The dielectric function and plasmon modes of a two-dimensional electron gas (2DEG) are studied in single- and double-quantum-well structures with Rashba spin-orbit interaction (RSOI) in the framework...
The band structure and magnetotransport of a two-dimensional electron gas (2DEG), in the presence of the Rashba (RSOI) and Dresselhaus (DSOI) terms of the spin-orbit interaction and of a...
Duan, G., Dong, Z. Y., Wang, X. F.
The existence of undesirable electricity price spikes in a competitive electricity market requires an efficient auction mechanism. However, many of the existing auction mechanism have difficulties in...
Wang, X. F., Vasilopoulos, P., Peeters, F. M.
Transport properties of a two-dimensional electron gas (2DEG) are studied in the presence of a perpendicular magnetic field $B$, of a {\it weak} one-dimensional (1D) periodic potential modulation,...
Wang, X F, Reddy, M M, Quinton, Paul M
Effective and specific inhibition of the cystic fibrosis transmembrane conductance regulator (CFTR) Cl- channel in epithelia has long been needed to better understand the role of anion movements in...
Wang, X. F., Vasilopoulos, P., Peeters, F. M.
Transport properties of the two-dimensional electron gas (2DEG) are considered in the presence of a perpendicular magnetic field $B$ and of a {\it weak} two-dimensional (2D) periodic potential...
The electron transmission $T$ is evaluated through waveguides, in which the strength of the spin-orbit interaction(SOI) $\alpha$ is varied periodically, using the transfer-matrix technique. It is...
We study ballistic transport of spin-polarized electrons through quantum wires in which the strength of the Rashba spin-orbit interaction (SOI) is spatially modulated. Subband mixing, due to SOI,...
Magnetotransport in a two-dimensional electron gas in the presence of spin-orbit interaction (2003)
We evaluate the transport coefficients of a two-dimensional electron gas (2DEG) in the presence of a perpendicular magnetic field and of the spin-orbit interaction (SOI) described only by the Rashba...
X.F. Wang, M.K. Yu, S.Y. Lam, K.M. Leung, J.L. Jiang, P.S. Leung, ...
The luminal fluid microenvironment of the uterus is important for sperm capacitation and embryo development. In an attempt to understand the possible role of Na+/H+ exchangers (NHEs) in uterine...
We study spin transport of holes through stubless or stubbed waveguides modulated periodically by diluted magnetic semiconductor (DMS) sections of width b1 . Injected holes of up (down) spin feel a...
Frictional drag between non-equilibrium electron gases (2002)
Using the balance of forces in the linear regime, it is shown that the ratio between the induced voltage in an open circuit Coulomb drag experiment, and the induced current in closed circuit, equals...
Magnetic multilayers in Ga1-xMn xAs/GaAs struc (2002)
Silva,L. Loureiro Da, Boselli,M. A., Wang,X. F., Weberszpil,J., Makler,S.S., ...
Mn in GaAs substitutes Ga as a p dopant and introduces a localized magnetic moment of 5/2. Ga1-xMn xAs (for x ยป 0.04) has been proved to be an extremely interesting material, for its intrincated...
Wang, X. F., Vasilopoulos, P., Peeters, F. M.
Ballistic spin transport is studied through electronic tuners with double stubs attached to them. The spins precess due to the spin-orbit interaction. Injected polarized spins can exit the structure...
Wang, X. F., Vasilopoulos, P., Peeters, F. M.
Ballistic spin transport through waveguides, with symmetric or asymmetric double stubs attached to them periodically, is studied systematically in the presence of a weak spin-orbit coupling that...
Tunability of acoustic spectral gaps and transmission in periodically stubbed waveguides (2001)
Wang, X. F., Kushwaha, M. S., Vasilopoulos, P.
A theoretical investigation is made of acoustic wave propagation in a periodically stubbed waveguide. In general the waveguide segments and stubs are made of different materials. The acoustic wave in...
Spin-polarized transport in GaMnAs multilayers (2001)
Da Silva, L. Loureiro, Boselli, M. A., Wang, X. F., Ghazali, A.
The spin-dependent mobility for the lateral transport of the hole gas in a GaMnAs/GaAs heterostructure containing several metallic-like ferromagnetic layers is calculated. The electronic structure is...
Frictional drag between non-equilibrium charged gases (2000)
The frictional drag force between separated but coupled two-dimensional electron gases of different temperatures is studied using the non-equilibrium Green function method based on the separation of...
Electron-phonon interaction in CdTe/CdMnTe/CdMgTe quantum wells (1999)
The optic vibrational (confined and interface) modes and the electron-phonon and hole-phonon interactions are obtained, in the dielectric continuum model, for two diluted magnetic semiconductor...
INFRARED ABSORPTION OF TRANS-CIS $N_{2}O_{3}$ IN ARGON MATRIX (1997)
WANG, X.F., ZHENG, Q.K., QIN, Q.Z.
Author Institution: Laser Chemistry Institute, Fudan University
Yingling, J M, Das, P, Savage, C, Zhang, M, Padgett, R W, Wang, X F
The dwarfin protein family has been genetically implicated in transforming growth factor beta (TGF-beta)-like signaling pathways in Drosophila and Caenorhabditis elegans. To investigate the role of...
Datto, M B, Li, Y, Panus, J F, Howe, D J, Xiong, Y, Wang, X F
The transforming growth factor beta s (TGF-beta s) are a group of multifunctional growth factors which inhibit cell cycle progression in many cell types. The TGF-beta-induced cell cycle arrest has...
Schwarz, J K, Bassing, C H, Kovesdi, I, Datto, M B, Blazing, M, George, S, ...
Inhibition of cell growth by type beta transforming growth factor (TGF-beta) occurs in mid-G1 and is associated with decreased G1 cyclin-dependent kinase activity and maintenance of the...
Li, J M, Datto, M B, Shen, X, Hu, P P, Yu, Y, Wang, X F
Transforming growth factor beta (TGF-beta) causes growth arrest at the G1 phase of the cell cycle in most cell types. Both the cyclin dependent kinase inhibitor p15(INK4B) and p21(Cip1/WAF1) genes...
Datto, M B, Hu, P P, Kowalik, T F, Yingling, J, Wang, X F
The adenovirus early gene product E1A is a potent stimulator of cellular proliferation, which when overexpressed can overcome the growth-inhibitory effects of the polypeptide hormone transforming...
Tumor suppressor Smad4 is a transforming growth factor beta-inducible DNA binding protein.
Yingling, J M, Datto, M B, Wong, C, Frederick, J P, Liberati, N T, Wang, X F
Members of the Smad family of proteins are thought to play important roles in transforming growth factor beta (TGF-beta)-mediated signal transduction. In response to TGF-beta, specific Smads become...
Friend, S H, Horowitz, J M, Gerber, M R, Wang, X F, Bogenmann, E, Li, F P, ...
Retinoblastoma is a childhood tumor that can arise because of mutant alleles acquired as somatic or germinal mutations. The mutant allele can be carried in the germ line. The mutations creating these...
Tsao, B P, Wang, X F, Peterson, C L, Calame, K
We have systematically investigated the functional role of protein binding sites within the mouse immunoglobulin heavy chain enhancer which we previously identified by in vitro binding studies (1,2)....
Gordon, G W, Chazotte, B, Wang, X F, Herman, B
Fluorescence recovery after photobleaching has been a popular technique to quantify the lateral mobility of membrane components. A variety of analysis methods have been used to determine the lateral...
Yingling, J M, Das, P, Savage, C, Zhang, M, Padgett, R W, Wang, X F
The dwarfin protein family has been genetically implicated in transforming growth factor beta (TGF-beta)-like signaling pathways in Drosophila and Caenorhabditis elegans. To investigate the role of...
Datto, M B, Li, Y, Panus, J F, Howe, D J, Xiong, Y, Wang, X F
The transforming growth factor beta s (TGF-beta s) are a group of multifunctional growth factors which inhibit cell cycle progression in many cell types. The TGF-beta-induced cell cycle arrest has...
Schwarz, J K, Bassing, C H, Kovesdi, I, Datto, M B, Blazing, M, George, S, ...
Inhibition of cell growth by type beta transforming growth factor (TGF-beta) occurs in mid-G1 and is associated with decreased G1 cyclin-dependent kinase activity and maintenance of the...
Li, J M, Datto, M B, Shen, X, Hu, P P, Yu, Y, Wang, X F
Transforming growth factor beta (TGF-beta) causes growth arrest at the G1 phase of the cell cycle in most cell types. Both the cyclin dependent kinase inhibitor p15(INK4B) and p21(Cip1/WAF1) genes...
Datto, M B, Hu, P P, Kowalik, T F, Yingling, J, Wang, X F
The adenovirus early gene product E1A is a potent stimulator of cellular proliferation, which when overexpressed can overcome the growth-inhibitory effects of the polypeptide hormone transforming...
Tumor suppressor Smad4 is a transforming growth factor beta-inducible DNA binding protein.
Yingling, J M, Datto, M B, Wong, C, Frederick, J P, Liberati, N T, Wang, X F
Members of the Smad family of proteins are thought to play important roles in transforming growth factor beta (TGF-beta)-mediated signal transduction. In response to TGF-beta, specific Smads become...
Friend, S H, Horowitz, J M, Gerber, M R, Wang, X F, Bogenmann, E, Li, F P, ...
Retinoblastoma is a childhood tumor that can arise because of mutant alleles acquired as somatic or germinal mutations. The mutant allele can be carried in the germ line. The mutations creating these...
Tsao, B P, Wang, X F, Peterson, C L, Calame, K
We have systematically investigated the functional role of protein binding sites within the mouse immunoglobulin heavy chain enhancer which we previously identified by in vitro binding studies (1,2)....
Gordon, G W, Chazotte, B, Wang, X F, Herman, B
Fluorescence recovery after photobleaching has been a popular technique to quantify the lateral mobility of membrane components. A variety of analysis methods have been used to determine the lateral...