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Unveiling the driving force for a phase transition is normally difficult when multiple degrees of freedom are strongly coupled. One example is the nematic phase transition in iron-based superconductors. Its mechanism remains controversial…

Superconductivity · Physics 2020-07-29 C. Cai , T. T. Han , Z. G. Wang , L. Chen , Y. D. Wang , Z. M. Xin , M. W. Ma , Yuan Li , Y. Zhang

We report the high-resolution angle-resolved photoemission spectroscopy studies of electronic structure of EuFe2As2. The paramagnetic state data are found to be consistent with density-functional calculations. In the antiferromagnetic…

We present a comprehensive $^{31}$P and $^{65}$Cu nuclear magnetic resonance (NMR) study of the layered van der Waals magnet CuCrP$_2$S$_6$. The compound exhibits a sequence of structural and magnetic phase transitions: a high-temperature…

Strongly Correlated Electrons · Physics 2026-04-06 C. S. Saramgi , L. F. Prager , S. Selter , Y. Shemerliuk , S. Aswartham , B. Büchner , H. -J. Grafe , K. M. Ranjith

Three-dimensional Fermi surfaces at a high temperature have been clarified for a strongly correlated Ce compound, ferromagnet CeRu$_2$Ge$_2$ in the paramagnetic phase, by virtue of a soft x-ray $h\nu$-dependent (700-860 eV) ARPES. Although…

Strongly Correlated Electrons · Physics 2007-05-23 M. Yano , A. Sekiyama , H. Fujiwara , T. Saita , S. Imada , T. Muro , Y. Onuki , S. Suga

Angle-resolved photoemission spectroscopy (ARPES) has played an important role in determining the band structure and the superconducting gap structure of iron-based superconductors. Here from the ARPES perspective, we briefly review the…

Superconductivity · Physics 2015-06-16 Z. R. Ye , Y. Zhang , B. P. Xie , D. L. Feng

The electronic structure of the reentrant superconductor Eu(Fe$_{0.86}$Ir$_{0.14}$)$_{2}$As$_{2}$ (T$_c$ = 22 K) with coexisting ferromagnetic order (T$_M$ = 18 K) is investigated using angle-resolved photoemission spectroscopy (ARPES) and…

We present the temperature and layer dependent electronic structure of a 20-layer EuS(100)-film using a combination of first-principles and model calculation, the latter based on the ferromagnetic Kondo-lattice. The calculated…

Strongly Correlated Electrons · Physics 2016-08-16 Wolf Müller , Wolfgang Nolting

Temperature-dependent angle-resolved photoemission spectroscopy (ARPES) was carried out on single-crystalline EuB6 samples. By measuring ARPES spectra in an extended Brillouin zone, a B 2p hole pocket centered at the X point is clearly…

Strongly Correlated Electrons · Physics 2021-08-24 Chul-Hee Min , Boyoun Kang , Beong Ki Cho , En-Jin Cho , Byeong-Gyu Park , Hyeong-Do Kim

We synthesized the ferromagnetic EuAgP semiconductor and conducted a comprehensive study of its crystalline, magnetic, heat capacity, band gap, and magnetoresistance properties. Our investigation utilized a combination of X-ray diffraction,…

Strongly Correlated Electrons · Physics 2024-09-04 Qian Zhao , Kaitong Sun , Si Wu , Hai-Feng Li

We performed angle-resolved photoemission spectroscopy (ARPES) on hexagonal MnTe, a candidate for an altermagnet with a high critical temperature (TN=307 K). By utilizing photon-energy-tunable ARPES in combination with first-principles…

Materials Science · Physics 2024-03-07 T. Osumi , S. Souma , T. Aoyama , K. Yamauchi , A. Honma , K. Nakayama , T. Takahashi , K. Ohgushi , T. Sato

We study the electronic structure of the ferromagnetic spinel $\mathrm{Hg}\mathrm{Cr}_2\mathrm{Se}_4$ by soft-x-ray angle-resolved photoemission spectroscopy (SX-ARPES) and first-principles calculations. While a theoretical study has…

Here we investigate the thermodynamic and electronic properties of Eu$_{11}$InSb$_9$ single crystals. Electrical transport data show that Eu$_{11}$InSb$_9$ has a semiconducting ground state with a relatively narrow band gap of $320$~meV.…

Strongly Correlated Electrons · Physics 2021-07-29 S. S. Fender , S. M. Thomas , F. Ronning , E. D. Bauer , J. D. Thompson , P. F. S. Rosa

Epitaxial FeRh(100) films (CsCl structure, $\sim 10\ ML\ $ thick), prepared {\it in-situ} on a W(100) single crystal substrate, have been investigated via valence band and core level photoemission. The presence of the temperature-induced,…

Materials Science · Physics 2011-04-29 J. -S. Lee , E. Vescovo , L. Plucinski , C. M. Schneider , C. -C. Kao

We have addressed the possibility of surface ferromagnetism in Sr2RuO4 by investigating its surface electronic states by angle-resolved photoemission spectroscopy (ARPES). By cleaving samples under different conditions and using various…

The experimental studies of the paramagnetic-antiferromagnetic phase transition through M\"{o}ssbauer spectroscopy and measurements of temperature and field dependencies of magnetic susceptibility in the layered Cu$_{0.15}$Fe$_{0.85}$PS$_3$…

Computational Physics · Physics 2023-01-05 V. Pashchenko , O. Bludov , D. Baltrunas , K. Mazeika , S. Motria , K. Glukhov , Yu. Vysochanskii

The mechanism of the peculiar transport properties around the magnetic ordering temperature of semiconducting antiferromagnetic EuCd$_2$P$_2$ is not yet understood. With a huge peak in the resistivity observed above the N\'eel temperature,…

Among the family of intercalated transition-metal dichalcogenides (TMDs), Fe$_{x}$NbS$_2$ is found to possess unique current-induced resistive switching behaviors, tunable antiferromagnetic states, and a commensurate charge order, all of…

We have successfully synthesized single crystals of EuNi$_5$As$_3$ using a flux method and we present a comprehensive study of the physical properties using magnetic susceptibility, specific heat, electrical resistivity, thermoelectric…

Strongly Correlated Electrons · Physics 2017-01-20 W. B. Jiang , M. Smidman , W. Xie , J. Y. Liu , J. M. Lee , J. M. Chen , S. C. Ho , H. Ishii , K. D. Tsuei , C. Y. Guo , Y. J. Zhang , Hanoh Lee , H. Q. Yuan

We studied the behavior of nontrivial Dirac fermion states in an antiferromagnetic metal SmBi using angle-resolved photoemission spectroscopy (ARPES). The experimental results exhibit multiple Fermi pockets around $\overline{\Gamma}$ and…

Here, by applying a comprehensive approach including magnetic, transport measurements, ARPES band structure measurements, DFT calculations, and analytical theory consideration, we unveil the puzzling origin of the negative isotropic…