L. Harnagea
Leibniz Association
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Publication
Featured researches published by L. Harnagea.
Physical Review B | 2014
J. Maletz; V. B. Zabolotnyy; D. V. Evtushinsky; S. Thirupathaiah; A. U. B. Wolter; L. Harnagea; A. N. Yaresko; A. N. Vasiliev; D. A. Chareev; A. E. Böhmer; F. Hardy; Th. Wolf; C. Meingast; E. Rienks; Bernd Büchner; S. V. Borisenko
The electronic structure of the iron chalcogenide superconductor FeSe_{1-x} was investigated by high- resolution angle-resolved photoemission spectroscopy (ARPES). The results were compared to DFT calculations showing some significant differences between the experimental electronic structure of FeSe_{1-x}, DFT calculations and existing data on FeSe_{x}Te_{1-x}. The bands undergo a pronounced orbital dependent renormalization, different from what was observed for FeSe_{x}Te_{1-x} and any other pnictides.
Physical Review B | 2011
A. K. Pramanik; L. Harnagea; C. Nacke; A. U. B. Wolter; S. Wurmehl; V. Kataev; B. Büchner
We investigate the fishtail effect, critical current density (
Physical Review B | 2011
L. Harnagea; Surjeet Singh; G. Friemel; N. Leps; Dirk Bombor; M. Abdel-Hafiez; A. U. B. Wolter; C. Hess; R. Klingeler; G. Behr; S. Wurmehl; B. Büchner
{J}_{c}
Physical Review B | 2014
M. Abdel-Hafiez; Paulo J. Pereira; S. A. Kuzmichev; T. E. Kuzmicheva; V. M. Pudalov; L. Harnagea; A. A. Kordyuk; Alejandro Silhanek; Victor Moshchalkov; B. G. Shen; Hai-Hu Wen; A. N. Vasiliev; Xiao-Jia Chen
), and vortex dynamics in LiFeAs single crystals. The sample exhibits a second peak (SP) in the magnetization loop only with the field
Physical Review B | 2014
S. Johnston; M. Abdel-Hafiez; L. Harnagea; V. Grinenko; Dirk Bombor; Y. Krupskaya; C. Hess; S. Wurmehl; A. U. B. Wolter; B. Büchner; H. Rosner; S.-L. Drechsler
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Physical Review B | 2013
D. V. Evtushinsky; V. B. Zabolotnyy; L. Harnagea; A. N. Yaresko; S. Thirupathaiah; A. A. Kordyuk; J. Maletz; S. Aswartham; S. Wurmehl; E. Rienks; R. Follath; B. Büchner; S. V. Borisenko
Physical Review B | 2011
O. Heyer; T. Lorenz; V. B. Zabolotnyy; D. V. Evtushinsky; S. V. Borisenko; I. V. Morozov; L. Harnagea; S. Wurmehl; C. Hess; B. Büchner
c
Physical Review B | 2010
A. K. Pramanik; L. Harnagea; S. Singh; S. Aswartham; G. Behr; S. Wurmehl; C. Hess; R. Klingeler; B. Büchner
axis. We calculate a reasonably high
Journal of Physics: Condensed Matter | 2013
S. H. Baek; L. Harnagea; S. Wurmehl; Bernd Büchner; H. J. Grafe
{J}_{c}
Journal of Physics: Condensed Matter | 2011
Pradeep Kumar; Achintya Bera; D. V. S. Muthu; Anil Kumar; Umesh V. Waghmare; L. Harnagea; Christian Hess; S. Wurmehl; Surjeet Singh; Bernd Büchner; A. K. Sood
, however, values are lower than in Ba-122- and 1111-type FeAs compounds. Magnetic relaxation data imply a strong pinning which appears not to be due to conventional defects. Moreover, we find that the calculated magnetic relaxation rate is very low in LiFeAs. Our data suggest that the origin of the SP may be related to a vortex lattice phase transition. We have constructed the vortex phase diagram for LiFeAs on the field-temperature plane.
