G. L. Sun

Self-energy effects and electron-phonon coupling in Fe-As superconductors (2009)

Lemmens, P., Eremin, I., Zwicknagl, G., Berger, H., Sun, G. L., ...

We report on Raman scattering experiments of the undoped SrFe2As2 and superconducting Sr0.85K0.15Fe2As2 (Tc=28K) and Ba0.72K0.28Fe2As2 (Tc=32K) single crystals. The frequency and linewidth of the B1g...

Transport properties and the anisotropy of Ba_{1-x}K_xFe_2As_2 single crystals in normal and superconducting states (2009)

Zverev, V. N., Korobenko, A. V., Sun, G. L., Sun, D. L., Lin, C. T., Boris, A. V.

The transport and superconducting properties of Ba_{1-x}K_xFe_2As_2 single crystals with T_c = 31 K were studied. Both in-plane and out-of plane resistivity was measured by modified Montgomery...

Phonon anomalies in pure and underdoped R{1-x}K{x}Fe{2}As{2} (R = Ba, Sr) investigated by Raman light scattering (2009)

Rahlenbeck, M., Sun, G. L., Sun, D. L., Lin, C. T., Keimer, B., Ulrich, C.

We present a detailed temperature dependent Raman light scattering study of optical phonons in Ba{1-x}K{x}Fe{2}As{2} (x ~ 0.28, superconducting Tc ~ 29 K), Sr{1-x}K{x}Fe{2}As{2} (x ~ 0.15, Tc ~ 29 K)...

Electronic phase separation in the slightly underdoped iron pnictide superconductor Ba1-xKxFe₂As₂ (2009)

Park, J. T., Inosov, D. S., Niedermayer, Ch., Sun, G. L., Haug, D., Christensen, N. B., ...

Here we present a combined study of the slightly underdoped novel pnictide superconductor Ba1-xKxFe₂As₂ by means of x-ray powder diffraction, neutron scattering, muon-spin rotation (µSR), and...

Electronic phase separation in the slightly underdoped iron pnictide superconductor Ba1-xKxFe₂As₂ (2009)

Park, J. T., Inosov, D. S., Niedermayer, Ch., Sun, G. L., Haug, D., Christensen, N. B., ...

Here we present a combined study of the slightly underdoped novel pnictide superconductor Ba1-xKxFe₂As₂ by means of x-ray powder diffraction, neutron scattering, muon-spin rotation (µSR), and...

Fermi surface of Ba{1-x}KxFe2As2 as probed by angle-resolved photoemission (2009)

Zabolotnyy, V. B., Evtushinsky, D. V., Kordyuk, A. A., Inosov, D. S., Koitzsch, A., Boris, A. V., ...

Here we apply high resolution angle-resolved photoemission spectroscopy (ARPES) using a wide excitation energy range to probe the electronic structure and the Fermi surface topology of the...

Anisotropic spin fluctuations and multiple superconducting gaps in hole-doped Ba_0.7K_0.3Fe_2As_2: NMR in a single crystal (2009)

Matano, K., Sun, G. L., Sun, D. L., Lin, C. T., Ichioka, M., Zheng, Guo-qing

We report the first ^{75}As-NMR study on a single crystal of the hole-doped iron-pnictide superconductor Ba_{0.7}K_{0.3}Fe_2As_{2} (T_c = 31.5 K). We find that the Fe antiferromagnetic spin...

Suppression of the structural phase transition and lattice softening in slightly underdoped Ba(1-x)K(x)Fe2As2 with electronic phase separation (2009)

Inosov, D. S., Leineweber, A., Yang, Xiaoping, Park, J. T., Christensen, N. B., Dinnebier, R., ...

We present x-ray powder diffraction (XRPD) and neutron diffraction measurements on the slightly underdoped iron pnictide superconductor Ba(1-x)K(x)Fe2As2, Tc = 32K. Below the magnetic transition...

Momentum-resolved superconducting gap in the bulk of Ba$_{1-x}$K$_{x}$Fe$_2$As$_2$ from combined ARPES and $\mu$SR measurements (2009)

Evtushinsky, D. V., Inosov, D. S., Zabolotnyy, V. B., Viazovska, M. S., Khasanov, R., Amato, A., ...

Here we present a calculation of the temperature-dependent London penetration depth, $\lambda(T)$, in Ba$_{1-x}$K$_{x}$Fe$_2$As$_2$ (BKFA) on the basis of the electronic band structure [1,2] and...

Iron pnictides: Single crystal growth and effect of doping on structural, transport and magnetic properties (2009)

Sun, G. L., Sun, D. L., Konuma, M., Popovich, P., Boris, A., Peng, J. B., ...

We demonstrate the preparation of large, free standing iron pnictide single crystals with a size up to 20 x 10 x 1 mm3 using solvents in zirconia crucibles under argon atmosphere. Transport and...

Two-gap superconductivity in Ba_{1-x}K_xFe_2As_2 inferred from investigations of the magnetic penetration depth (2009)

Khasanov, R., Amato, A., Luetkens, H., Niedermayer, Ch., Sun, G. L., ...

Using muon-spin rotation, we studied the anisotropy of the magnetic-field penetration depth \gamma_\lambda=\lambda_c/\lambda_ab in an extensively characterized sample of superconducting...

Electronic phase separation in the slightly underdoped iron pnictide superconductor Ba(1-x)K(x)Fe(2)As(2) (2008)

Park, J. T., Inosov, D. S., Niedermayer, Ch., Sun, G. L., Haug, D., Christensen, N. B., ...

Here we present a combined study of the slightly underdoped novel pnictide superconductor Ba(1-x)K(x)Fe(2)As(2) by means of X-ray powder diffraction, neutron scattering, muon spin rotation (muSR),...

Momentum dependence of the superconducting gap in Ba$_{1-x}$K$_{x}$Fe$_2$As$_2$ (2008)

Evtushinsky, D. V., Inosov, D. S., Zabolotnyy, V. B., Koitzsch, A., Knupfer, M., Buchner, B., ...

The precise momentum dependence of the superconducting gap in the iron-arsenide superconductor with Tc = 32K (BKFA) was determined from angle-resolved photoemission spectroscopy (ARPES) via fitting...

(pi,pi)-electronic order in iron arsenide superconductors (2008)

Zabolotnyy, V. B., Inosov, D. S., Evtushinsky, D. V., Koitzsch, A., Kordyuk, A. A., Sun, G. L., ...

The distribution of valence electrons in metals usually follows the symmetry of an ionic lattice. Modulations of this distribution often occur when those electrons are not stable with respect to a...