Photoemission study of the temperature-dependent energy-gap formation in the Kondo semiconductor CeRhAs

2005 ◽  
Vol 144-147 ◽  
pp. 857-859 ◽  
Author(s):  
Kenya Shimada ◽  
Mitsuharu Higashiguchi ◽  
Takamasa Narimura ◽  
Masashi Arita ◽  
Yukiharu Takeda ◽  
...  
Keyword(s):  
Energy Gap ◽  
Gap Formation ◽  
Temperature Dependent ◽  
Kondo Semiconductor ◽  
Photoemission Study

scholarly journals High-resolution photoemission study of Ce1−xLaxRhAs: A collapse of the energy gap in the Kondo semiconductor

2006 ◽  
Vol 383 (1) ◽  
pp. 140-141 ◽  
Author(s):  
K. Shimada ◽  
M. Higashiguchi ◽  
S.-I. Fujimori ◽  
Y. Saitoh ◽  
A. Fujimori ◽  
...  
Keyword(s):  
High Resolution ◽  
Energy Gap ◽  
Kondo Semiconductor ◽  
Photoemission Study

75As NQR/NMR Study of Successive Phase Transitions and Energy Gap Formation in Kondo Semiconductor CeRhAs

2003 ◽  
Vol 72 (5) ◽  
pp. 1030-1033 ◽  
Author(s):  
Masahiro Matsumura ◽  
Tetsuya Sasakawa ◽  
Toshiro Takabatake ◽  
Shigenori Tsuji ◽  
Hideki Tou ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Energy Gap ◽  
Gap Formation ◽  
Nmr Study ◽  
Kondo Semiconductor ◽  
Successive Phase

Valence photoemission study of temperature dependent reaction products in Ni-Si interfaces and thin films

1982 ◽  
Vol 43 (3) ◽  
pp. 199-202 ◽  
Author(s):  
I. Abbati ◽  
L. Braicovich ◽  
B. De Michelis ◽  
U. del Pennino ◽  
S. Valeri
Keyword(s):  
Thin Films ◽  
Reaction Products ◽  
Temperature Dependent ◽  
Photoemission Study

scholarly journals Temperature-dependent valence-band photoemission study of UNiSn

2001 ◽  
Vol 64 (8) ◽  
Author(s):  
J.-S. Kang ◽  
J.-G. Park ◽  
K. A. McEwen ◽  
C. G. Olson ◽  
S. K. Kwon ◽  
...  
Keyword(s):  
Valence Band ◽  
Temperature Dependent ◽  
Photoemission Study

scholarly journals Momentum-resolved superconducting energy gaps of Sr2RuO4 from quasiparticle interference imaging

2020 ◽  
Vol 117 (10) ◽  
pp. 5222-5227 ◽  
Author(s):  
Rahul Sharma ◽  
Stephen D. Edkins ◽  
Zhenyu Wang ◽  
Andrey Kostin ◽  
Chanchal Sow ◽  
...  
Keyword(s):  
Knight Shift ◽  
Energy Gap ◽  
Space Structure ◽  
Superconducting Order Parameter ◽  
Temperature Dependent ◽  
High Precision Measurement ◽  
Quasiparticle Interference ◽  
Energy Gaps ◽  
Superconducting Energy Gap ◽  
Intense Research

Sr2RuO4 has long been the focus of intense research interest because of conjectures that it is a correlated topological superconductor. It is the momentum space (k-space) structure of the superconducting energy gap Δi(k) on each band i that encodes its unknown superconducting order parameter. However, because the energy scales are so low, it has never been possible to directly measure the Δi(k) of Sr2RuO4. Here, we implement Bogoliubov quasiparticle interference (BQPI) imaging, a technique capable of high-precision measurement of multiband Δi(k). At T = 90 mK, we visualize a set of Bogoliubov scattering interference wavevectors qj:j=1−5 consistent with eight gap nodes/minima that are all closely aligned to the (±1,±1) crystal lattice directions on both the α and β bands. Taking these observations in combination with other very recent advances in directional thermal conductivity [E. Hassinger et al., Phys. Rev. X 7, 011032 (2017)], temperature-dependent Knight shift [A. Pustogow et al., Nature 574, 72–75 (2019)], time-reversal symmetry conservation [S. Kashiwaya et al., Phys. Rev B, 100, 094530 (2019)], and theory [A. T. Rømer et al., Phys. Rev. Lett. 123, 247001 (2019); H. S. Roising, T. Scaffidi, F. Flicker, G. F. Lange, S. H. Simon, Phys. Rev. Res. 1, 033108 (2019); and O. Gingras, R. Nourafkan, A. S. Tremblay, M. Côté, Phys. Rev. Lett. 123, 217005 (2019)], the BQPI signature of Sr2RuO4 appears most consistent with Δi(k) having dx2−y2(B1g) symmetry.

BCS temperature-dependent superconducting energy gap in domain boundaries of melt-textured YBa2Cu3O7

1994 ◽  
Vol 7 (2) ◽  
pp. 409-414
Author(s):  
Moises Levy ◽  
Zheng -Xiao Li ◽  
Bimal K. Sarma ◽  
S. Salem-Sugui ◽  
Donglu Shi
Keyword(s):  
Energy Gap ◽  
Temperature Dependent ◽  
Superconducting Energy Gap ◽  
Domain Boundaries

Temperature-Dependent Energy Gap of the Primary Charge Separation in Photosystem I: Study of Delayed Fluorescence at 77−268 K

2008 ◽  
Vol 112 (21) ◽  
pp. 6695-6702 ◽  
Author(s):  
Yutaka Shibata ◽  
Shinpei Akai ◽  
Takashi Kasahara ◽  
Isamu Ikegami ◽  
Shigeru Itoh
Keyword(s):  
Photosystem I ◽  
Charge Separation ◽  
Energy Gap ◽  
Delayed Fluorescence ◽  
Temperature Dependent ◽  
Primary Charge Separation

Unrelated BCS-like pairing pseudogap and critical superconducting transition temperature in various cuprate compounds

2018 ◽  
Vol 32 (18) ◽  
pp. 1850195
Author(s):  
S. Dzhumanov ◽  
E. X. Karimboev ◽  
Sh. S. Djumanov
Keyword(s):  
Transition Temperature ◽  
Superconducting Transition Temperature ◽  
Order Parameter ◽  
Cuprate Superconductors ◽  
Energy Gap ◽  
Characteristic Temperature ◽  
Superconducting Order Parameter ◽  
Superconducting Transition ◽  
Gap Formation ◽  
Arpes Data

The smooth evolution of the energy gap observed in the tunneling and angle-resolved photoemission spectra (ARPES) of high-[Formula: see text] cuprates with lowering the temperature from a pseudogap state above the critical temperature [Formula: see text] to a superconducting state below [Formula: see text], has been poorly interpreted as the evidence that the pseudogap must have the same origin as the superconducting order parameter, and therefore, must be related to [Formula: see text]. We argue that such an explanation of the tunneling gap and ARPES data is misleading. We show that the BCS-like energy gap (or pseudogap) opening in the electronic excitation spectrum of underdoped-to-overdoped cuprates at a characteristic temperature [Formula: see text] and the true superconducting order parameter appearing only at [Formula: see text] are unrelated. The superconducting phenomenon in unconventional cuprate superconductors is fundamentally different from the BCS-like pairing of fermionic quasiparticles, and the superconducting transition temperature [Formula: see text] is not determined by the BCS-like gap formation. The unusual superconducting order parameter in these high-[Formula: see text] materials appears at [Formula: see text] and coexists with the BCS-like gap (or pseudogap) below [Formula: see text].

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