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Chainani A, Yokoya T, Kiss T, Shin S. Photoemission spectroscopy of the strong-coupling superconducting transitions in lead and niobium. PHYSICAL REVIEW LETTERS 2000; 85:1966-1969. [PMID: 10970659 DOI: 10.1103/physrevlett.85.1966] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2000] [Indexed: 05/23/2023]
Abstract
We study the changes in the electronic structure associated with low- T(c) strong-coupling superconducting transitions in Pb and Nb using ultrahigh-resolution (2.3 meV) temperature-dependent (5.3-12.0 K) photoemission spectroscopy. We observe peaks in the density of states on entering the superconducting-phase accompanying gap formation and spectacular redistribution of spectral weight at low energy scales as a function of temperature. The well-known peak-dip feature of the high- T(c) cuprates is seen in Pb, making it a characteristic of strong-coupling superconductivity.
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Okamoto-Mizuno K, Yokoya T, Kudoh Y. Effects of activity of daily living and gender on circadian rhythms of the elderly in a nursing home. JOURNAL OF PHYSIOLOGICAL ANTHROPOLOGY AND APPLIED HUMAN SCIENCE 2000; 19:53-7. [PMID: 10979250 DOI: 10.2114/jpa.19.53] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The objective of this study was to confirm the effects of ADL (Activity of Daily Living) and gender on circadian rhythms of the elderly in a nursing home. Twenty-one elderly volunteers, aged over 65 years, were divided in four groups depending on their ADL and gender: subjects with almost no problem in ADL (H males, H females) and those who were almost bedridden (L males, L females). Oral temperature, heart rate, blood pressure, time of sleep and wake, subjective sleepiness, overall feeling and vitality were measured every 4 hours during the day continuously for six days. The circadian rhythm was calculated by using the least squares fit of cosine function. Subjective sleep quality was also surveyed. In the sleep/wake rhythm, the mesor was significantly higher in L males compared to the other groups and the amplitude was significantly lower in L females compared to other groups. The subjective sleepiness was higher in L males compared to the other groups and L females showed a higher sleepiness compared to H females. No significant difference among the group was observed in subjective sleep quality. In conclusion, these results indicate that the subjective sleepiness and sleep/wake rhythm differ depending on ADL and gender, although no significant difference was observed in physiological parameters. ADL and gender based difference in subjective sleepiness and sleep/wake rhythm should be taken into account with regard to the care of the elderly in nursing homes.
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Okamoto K, Kudoh Y, Yokoya T, Okudaira N. A survey of bedroom and bed climate of the elderly in a nursing home. APPLIED HUMAN SCIENCE : JOURNAL OF PHYSIOLOGICAL ANTHROPOLOGY 1998; 17:115-20. [PMID: 9682521 DOI: 10.2114/jpa.17.115] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Bedroom and bed climate of the elderly in a nursing home were surveyed. Twenty-two elderly subjects were divided into four groups depending on their Activity of Daily Living (ADL) and gender. The four groups were: male and female subjects with almost no problems in daily life and an ADL score higher than 5 [H males, H females] and male and female subjects who normally stayed in bed all day with an ADL score lower than 2 [L males, L females]. The temperature and humidity of the bedroom and bed climate were measured continuously for 24 hours. Bedding and clothing condition, subjective sensational vote and subjective sleep evaluation were surveyed before and after sleep for five days continuously. In the daytime, bedroom and bed climate temperature was significantly lower in H females than in the other groups. At night, no significant effect of gender and ADL was observed in bed climate, which was maintained at 33-35 degrees C, RH50-60% in all the groups. Bedding under the body increased significantly in L males and L females compared with H males and H females. The number of underwear increased significantly in H females. Subjective sleep evaluation was significantly better in H females than the other groups. These results suggest that ADL and gender based differences should be taken into account with regard to the care of the elderly in a nursing home.
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Norman MR, Ding H, Randeria M, Campuzano JC, Yokoya T, Takeuchi T, Takahashi T, Mochiku T, Kadowaki K, Guptasarma P, Hinks DG. Destruction of the Fermi surface in underdoped high-Tc superconductors. Nature 1998. [DOI: 10.1038/32366] [Citation(s) in RCA: 893] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Yokoya T, Chainani A, Takahashi T, Ding H, Campuzano JC, Katayama-Yoshida H, Kasai M, Tokura Y. Angle-resolved photoemission study of Sr2RuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:13311-13318. [PMID: 9985195 DOI: 10.1103/physrevb.54.13311] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Ding H, Norman MR, Campuzano JC, Randeria M, Bellman AF, Yokoya T, Takahashi T, Mochiku T, Kadowaki K. Angle-resolved photoemission spectroscopy study of the superconducting gap anisotropy in Bi2Sr2CaCu2O8+x. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:R9678-R9681. [PMID: 9984790 DOI: 10.1103/physrevb.54.r9678] [Citation(s) in RCA: 147] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kumigashira H, Yang S, Yokoya T, Chainani A, Takahashi T, Uesawa A, Suzuki T, Sakai O, Kaneta Y. High-resolution angle-resolved photoemission spectroscopy of CeBi. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:9341-9345. [PMID: 9984670 DOI: 10.1103/physrevb.54.9341] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Yokoya T, Takahashi T, Mochiku T, Kadowaki K. High-resolution angle-resolved photoemission spectroscopy of the momentum dependence of the superconducting gap in Bi2Sr2CaCu2O8. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:14055-14057. [PMID: 9983197 DOI: 10.1103/physrevb.53.14055] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Campuzano JC, Ding H, Norman MR, Randeria M, Bellman AF, Yokoya T, Takahashi T, Katayama-Yoshida H, Mochiku T, Kadowaki K. Direct observation of particle-hole mixing in the superconducting state by angle-resolved photoemission. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:R14737-R14740. [PMID: 9983343 DOI: 10.1103/physrevb.53.r14737] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Yang S, Kumigashira H, Yokoya T, Chainani A, Takahashi T, Takeya H, Kadowaki K. High-resolution photoemission study of CeRu2: The dual character of 4f electrons. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:R11946-R11948. [PMID: 9982894 DOI: 10.1103/physrevb.53.r11946] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Yokoya T, Chainani A, Takahashi T, Katayama-Yoshida H, Kasai M, Tokura Y. Extended Van Hove singularity in a noncuprate layered superconductor Sr2RuO4. PHYSICAL REVIEW LETTERS 1996; 76:3009-3012. [PMID: 10060847 DOI: 10.1103/physrevlett.76.3009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Yokoya T, Chainani A, Takahashi T, Katayama-Yoshida H, Kasai M, Tokura Y, Shanthi N, Sarma DD. Evidence for correlation effects in Sr2RuO4 from resonant and x-ray photoemission spectroscopy. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:8151-8154. [PMID: 9982294 DOI: 10.1103/physrevb.53.8151] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Ding H, Bellman AF, Campuzano JC, Randeria M, Norman MR, Yokoya T, Takahashi T, Katayama-Yoshida H, Mochiku T, Kadowaki K, Jennings G, Brivio GP. Electronic excitations in Bi2Sr 2CaCu2O8: Fermi surface, dispersion, and absence of bilayer splitting. PHYSICAL REVIEW LETTERS 1996; 76:1533-1536. [PMID: 10061747 DOI: 10.1103/physrevlett.76.1533] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Kumigashira H, Chainani A, Yokoya T, Akaki O, Takahashi T, Ito M, Kasaya M, Sakai O. High-energy-resolution photoemission study of CeNiSi2 and CePtSi2. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:2565-2568. [PMID: 9983761 DOI: 10.1103/physrevb.53.2565] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Takahashi T, Yokoya T, Chainani A, Kumigashira H, Akaki O, Kato R. Cooperative effects of electron correlation and charge ordering on the metal-insulator transition in quasi-one-dimensional deuterated (DMe-DCNQI)2Cu. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:1790-1794. [PMID: 9983638 DOI: 10.1103/physrevb.53.1790] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Takahashi T, Morimoto T, Yokoya T, Kunii S, Komatsubara T, Sakai O. Crystal-field splitting in CeB6 as observed by high-resolution photoemission. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:9140-9142. [PMID: 9979944 DOI: 10.1103/physrevb.52.9140] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Tanaka A, Chainani A, Yokoya T, Takahashi T, Miyazaki T, Hasegawa S, Mori T. Electronic structure of the quasi-one-dimensional organic conductors DCNQI (N,N'-dicyanoquinonediimine)-Cu salts. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:7951-7959. [PMID: 9979790 DOI: 10.1103/physrevb.52.7951] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Chainani A, Yokoya T, Morimoto T, Takahashi T, Todo S. High-resolution photoemission spectroscopy of the Verwey transition in Fe3O4. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:17976-17979. [PMID: 9978834 DOI: 10.1103/physrevb.51.17976] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Randeria M, Jennings G, Ding H, Campuzano JC, Bellman A, Yokoya T, Takahashi T, Katayama-Yoshida H, Mochiku T, Kadowaki K. Momentum distribution sum rule for angle-resolved photoemission. PHYSICAL REVIEW LETTERS 1995; 74:4951-4954. [PMID: 10058640 DOI: 10.1103/physrevlett.74.4951] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Ding H, Campuzano JC, Bellman AF, Yokoya T, Norman MR, Randeria M, Takahashi T, Katayama-Yoshida H, Mochiku T, Kadowaki K, Jennings G. Momentum Dependence of the Superconducting Gap in Bi2Sr2CaCu2O8. PHYSICAL REVIEW LETTERS 1995; 74:2784-2787. [PMID: 10058017 DOI: 10.1103/physrevlett.74.2784] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Yokoya T, Takahashi T, Mochiku T, Kadowaki K. Anisotropy of the electronic structure and superconducting gap in Bi2Sr2CaCu2O8. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:3945-3948. [PMID: 9979222 DOI: 10.1103/physrevb.51.3945] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Yokoya T, Takahashi T, Mochiku T, Kadowaki K. Anomalous band folding due to the BiO superstructure in Bi2Sr2CaCu2O8 studied by angle-resolved photoemission. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:10225-10229. [PMID: 9975104 DOI: 10.1103/physrevb.50.10225] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Chainani A, Yokoya T, Morimoto T, Takahashi T, Yoshii S, Kasaya M. High-resolution temperature-dependent photoemission spectroscopy of FeSi: Evidence for localized states. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:8915-8917. [PMID: 9974926 DOI: 10.1103/physrevb.50.8915] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Takahashi T, Morimoto T, Yokoya T, Kohgi M, Satoh T. High-energy-resolution photoemission study of single-crystal CeSix (x=1.86 and 1.7): A test of the Kondo model. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:15688-15691. [PMID: 10010700 DOI: 10.1103/physrevb.49.15688] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Furukawa T, Ohno K, Fukui M, Shimahara M, Yokoya T. [Clinical studies on postexodontic bleeding, 1. (author's transl)]. NIHON KOKU GEKA GAKKAI ZASSHI 1974; 20:354-8. [PMID: 4549810 DOI: 10.5794/jjoms.20.354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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