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We utilized high-resolution resonant angle-resolved photoemission spectroscopy (ARPES) to study the band structure and hybridization effect of the heavy-fermion compound Ce2IrIn8. We observe a nearly flat band at the binding energy of 7 meV…

Strongly Correlated Electrons · Physics 2019-05-21 H. -J. Liu , Y. -J. Xu , Y. -G. Zhong , J. -Y. Guan , L. -Y. Kong , J. -Z. Ma , Y. -B. Huang , Q. -Y. Chen , G. -F. Chen , M. Shi , Y. -F. Yang , H. Ding

We use high-resolution angle resolved photoemission spectroscopy (ARPES) and density functional theory (DFT) to investigate the electronic structure of the charge density wave (CDW) system LaSb$_2$. This compound is among an interesting…

We present a first-principles investigation of the electronic structure of the inversion-symmetry-broken spin-orbit-coupled metal candidate PbRe$_2$O$_6$. Our calculations reveal that the Fermi surfaces derived from the $d_{yz}$ and…

Materials Science · Physics 2026-04-29 Yuki Yanagi , Michi-To Suzuki

We show that the unusual observations of a pseudogap in the normal state of underdoped Bi_2Sr_2CaCu_2O_8+delta (BiSCO) using angle resolved photoemission spectroscopy (ARPES) is consistent with a new band structure for the cuprate…

Superconductivity · Physics 2009-09-25 Jason K. Perry , Jamil Tahir-Kheli

We report heavy electron behavior in unconventional superconductor YFe$_2$Ge$_2$ ($T_C \,{=}\, 1.2$ K). We directly observe very heavy bands ($m_\mathrm{eff}\sim 25 m_e$) within $\sim$10 meV of the Fermi level $E_{F}$ using angle-resolved…

We have studied the low-lying electronic structure of a new ThCr$_2$Si$_2$-type superconductor KNi$_2$Se$_2$ with angle-resolved photoemission spectroscopy. Three bands intersect the Fermi level, forming complicated Fermi surface topology,…

Superconductivity · Physics 2015-06-23 Q. Fan , X. P. Shen , M. Y. Li , D. W. Shen , W. Li , X. M. Xie , Q. Q. Ge , Z. R. Ye , S. Y. Tan , X. H. Niu , B. P. Xie , D. L. Feng

We review angle resolved photoemission spectroscopy (ARPES) results on the high Tc superconductors, focusing primarily on results obtained on the quasi-two dimensional cuprate Bi2Sr2CaCu2O8 and its single layer counterpart Bi2Sr2CuO6. The…

Superconductivity · Physics 2007-05-23 J. C. Campuzano , M. R. Norman , M. Randeria

Developing reliable methods for modulating the electronic structure of the two-dimensional electron gas (2DEG) in SrTiO3 is crucial for utilizing its full potential and inducing novel properties. Here, we show that relatively simple surface…

We have investigated the electronic structure of $\mathrm{Sr}_{1-y}\mathrm{Ca}_{y}\mathrm{Fe_{2}}(\mathrm{As}_{1-x}\mathrm{P}_{x}\mathrm{)_{2}}$ ($x$ = 0.25, $y$ = 0.08) by means of angle-resolved photoemission spectroscopy. From the…

We have performed systematic angle-resolved photoemission spectroscopy (ARPES) of iron-chalcogenide superconductor FeTe1-xSex to elucidate the electronic states relevant to the superconductivity. While the Fermi-surface shape is nearly…

The electronic structure near the Fermi level (EF) of Ba1-xKxFe2As2 (BaK122 ; x = 0.2 - 0.7) is studied using laser ultrahigh-resolution angle-resolved photoemission spectroscopy(ARPES). For the optimally doped case of x = 0.4, we clearly…

The three-dimensional electronic structure and Ce 4f electrons of the heavy fermion superconductor CePt2In7 is investigated. Angle-resolved photoemission spectroscopy using variable photon energy establishes the existence of quasi-two and…

By combining bulk sensitive soft-X-ray angular-resolved photoemission spectroscopy and accurate first-principles calculations we explored the bulk electronic properties of WTe$_2$, a candidate type-II Weyl semimetal featuring a large…

We report detailed study of angular-dependent magnetoresistance (AMR) with tilting angel $\theta$ from $c$-axis ranging from 0$^\circ$ to 360$^\circ$ on a high-quality FeSe single crystal. A pronounced AMR with twofold symmetry is observed,…

Superconductivity · Physics 2016-10-12 Yue Sun , Tatsuhiro Yamada , Sunseng Pyon , Tsuyoshi Tamegai

Generally, lattice distortions play a key role in determining the ground states of materials. Although it is well known that trigonal distortions are generic to most two-dimensional transition metal dichalcogenides, the impact of this…

Materials Science · Physics 2018-04-24 Banabir Pal , Yanwei Cao , Xiaoran Liu , Fangdi Wen , M. Kareev , A. T. N Diaye , P. Shafer , E. Arenholz , J. Chakhalian

We performed a high-resolution angle-resolved photoemission spectroscopy study of the Tl$_{0.63}$K$_{0.37}$Fe$_{1.78}$Se$_2$ superconductor ($T_c=29$ K). We show the existence of two electronlike bands at the M$(\pi, 0)$ point which cross…

Superconductivity · Physics 2011-02-23 X. -P. Wang , T. Qian , P. Richard , P. Zhang , J. Dong , H. -D. Wang , C. -H. Dong , M. -H. Fang , H. Ding

We study the band structure of twinned and detwinned BaFe$_2$As$_2$ using angle-resolved photoemission spectroscopy (ARPES). The combination of measurements in the ordered and normal state along four high-symmetry momentum directions…

Strongly Correlated Electrons · Physics 2019-01-11 H. Pfau , C. R. Rotundu , J. C. Palmstrom , S. D. Chen , M. Hashimoto , D. Lu , A. F. Kemper , I. R. Fisher , Z. -X. Shen

Altermagnetism is a novel magnetic phase combining characteristics of both antiferromagnetism and ferromagnetic ordering. Despite growing theoretical interest in altermagnetic materials, reports of experimentally verified high Neel…

Electronic structure of the 3x3 ordered-phase of a silicon (Si) layer on Al(111) has been studied by angle resolved photoemission spectroscopy (ARPES) technique using synchrotron radiation and modeled by a trial atomic model. A closed Fermi…

Soft and hard X-ray photoelectron spectroscopy (PES) has been performed for one of the heavy fermion system CeRu$_2$Si$_2$ and a $4f$-localized ferromagnet CeRu$_2$Ge$_2$ in the paramagnetic phase. The three-dimensional band structures and…

Strongly Correlated Electrons · Physics 2009-11-13 M. Yano , A. Sekiyama , H. Fujiwara , Y. Amano , S. Imada , T. Muro , M. Yabashi , K. Tamasaku , A. Higashiya , T. Ishikawa , Y. Onuki , S. Suga