論文使用權限 Thesis access permission:校內校外完全公開 unrestricted
開放時間 Available:
校內 Campus: 已公開 available
校外 Off-campus: 已公開 available
論文名稱 Title |
電子型超導體Pr1.85Ce0.15CuO4之比熱研究 Specific Heat Studies on the Electron-doped Superconductor Pr1.85Ce0.15CuO4 |
||
系所名稱 Department |
|||
畢業學年期 Year, semester |
語文別 Language |
||
學位類別 Degree |
頁數 Number of pages |
76 |
|
研究生 Author |
|||
指導教授 Advisor |
|||
召集委員 Convenor |
|||
口試委員 Advisory Committee |
|||
口試日期 Date of Exam |
2001-06-27 |
繳交日期 Date of Submission |
2001-07-04 |
關鍵字 Keywords |
低溫比熱研究 low-temperature specific heat |
||
統計 Statistics |
本論文已被瀏覽 5694 次,被下載 2820 次 The thesis/dissertation has been browsed 5694 times, has been downloaded 2820 times. |
中文摘要 |
本篇論文是想探討電子型超導體Pr2-xCexCuO4 (0.14<x<0.18) 的配對對稱形式,我們為了達到上述實驗目的,設計了以下實驗步驟: 1. 合成Pr1.85Ce0.15CuO4之樣品,並藉由利用X-Ray粉末繞射儀分析來驗證其晶格結構。 2. 電阻率對溫度的量測,瞭解樣品的臨界溫度與傳輸機制。 3. 磁化率的量測,瞭解樣品的抗磁性,及其超導含量之多寡,以確認樣品的品質。 4. 此系統的氧含量多寡為決定超導與否的關鍵因素,藉由氧含量的量測,以瞭解氧含量與系統超導的相對關係。 5. 低溫比熱的量測來釐清高溫超導體的超導機制究竟是s-wave或是d-wave?若是d-wave配對形式,我們預期能於零磁場測量中,找出電子比熱的T2項。 經過上述實驗分析我們認為此系統是d-wave配對形式,這個結果和C. C. Tsuei 在2000年的PRL所發表的結果是相同的。 |
Abstract |
In this thesis we synthesize Pr1.85Ce0.15CuO4 system by mean of X-ray diffraction, electrical resistivity, magnetic susceptibility and low-temperature specific heat. From these data analysis, we hope to more clearly understand the transition of electron-doped superconductor Pr2-xCexCuO4 (0.14<x<0.7) system. The main results show that the system is d-wave pairing symmetry. This conclusion is consisted with C. C. Tsuei’s result. They present phase-sensitive evidence that the electron-doped cuprates Pr1.85Ce0.15CuO4 have d-wave pairing symmetry. |
目次 Table of Contents |
第一章 簡介 第二章 基本比熱理論 第三章 實驗方法 第四章 量測結果與分析 第五章 結論 |
參考文獻 References |
[1] E. Dagotto, Rev. Mod Phys. 66,763 (1994) [2] J. G. Bednorz and K. A. Muller, Z. Phys. B 64, 198 (1986) [3] M. K. Wu, J. R. Ashburn, C. J. Torng, P. H. Hor, R. L. Meng, L. Gao, Z. J. Huang, Y. Q. Wang, and C. W. Chu, Phys. Rev. Lett. 58, 908 (1987) [4] C. W. Chu, L. Gao, F. Chen, Z. J. Huang, R. L. Meng and Y. Y. Xue, Nature 365, 323 (1993) [5] L. Gao, Y. Y. Xue, F. Chen, Q. Xiong, R. L. Meng, D. Ramirez and C. W. Chou, Phys. Rev. B 50, 4260 (1994) [6] J. T. markert and M. B. Maple, Solid State Commum. 70, 145 (1989) [7] J. T. Markert, E. A. Early, T. Bjornholm, S. Ghamaty, B. W. Lee, J. J. Neumeuer, R. D. Price, and M. B. Maple, Physica C 158, 178 (1989) [8] E. A. Early, N. Y. Ayoub, J. Beille, J. T. Markert, and M. B. Maple, Physica C 160, 320 (1989) [9] T. C. Huang, E, Moran, A. I. Nazzal, and J. B. Torrance, Physica C 158, 148 (1989) [10] H. C. Ku, J. H. Shieh, and G. H. Hwang, J. Phys 30, 197 (1992) [11] Y. T. Zhu and A. Manthiram, Phys. Rev. B 49, 6239 (1994) [12] P. G. Radaelli, J. D. Jorgensen, A. J. Schultz, J. L. Peng, and R. L. Green, Phys. Rev. B 49, 15322 (1994) [13] T. Kawashima and E. Takayama-Muromachi, Physica C 219, 389 (1994) [14] D. Scalapino, Phys. Rep. 250, 329 (1995) [15] J. F. Annett, N. D. Goldenfeld, and A. J. Leggett, in Physical Properties of High Temperature Superconductor V, edit By D. M. Ginsberg, World Scientific, Singapore (1990) [16] C. C. Tsuei, and J. R. Kirtley, Phys. Rev. Lett. 85, 182 (2000) [17] T. E. Hargreaves, H. Noma, J. Akimitsu, D. F. Brewer, N, E. Hussey, and A. L. Thomson, Physica C, 303, 33 (1998) [18] N. Momono, and M. Ido, Physica C 264, 311 (1996) [19] K. A. Moler, D. J. Baar, J. S. Urbach, Ruixing Liang, W. N. Hardy, and A. Kaputulnik, Phys. Rev. Lett. 73, 2744 (1994) [20] K. A. Moler, D. L. Sisson, J. S. Urbach, M. R. Beasley, and A. Kapitulink, Phys. Rev. B 55 3954 (1997) [21] N. W. Ashcroft and N. D. Mermin, in Solid State Physics, W. B. Saunder Company, Philadelphia (1976) [22] J. Bardeen, L. N. Cooper, and J. R. Schrieffer, Phys. Rev. 108, 1175 (1957) [23] W. S. Corak, B. B. Goodman, C. B. Satterthwaite, and A. Wexler, Phys. Rev. 102, 656 (1956) [24] N. E. Phullips, CRC Crit. Rev. Solid State Sci. 467 (1971) [25] D. Scalapino, Phys. Rep. 250, 329 (1995) [26] M. Prohammer, A. Perez-Gonzalez, and J. P. Carbotte, Phys. Rev. B 47, 15152 (1993) [27] G. E. Volovik, JETP Lett. 58, 469 (1993) [28] G. E. volovik, JETP Lett. 65, 491 (1997) [29] S. A. Simon and P.A. Lee, Phys. Rev. Lett. 78, 1548 (1997) [30] C. Caroli, P. G. deGennes, and J. Matrucon, Phys. Lett. 9, 307 (1964) [31] F. J. Blatt, P. A. Schroeder, C. L. Foiles, and D. Greig, in Thermoelectric Power of Metals, Plenum Publishing Corporation, New York (1976) [32] Skoog and west, Fundamentals of Analytical Chamistry [33] T. E. Hargreaves, H. Noma etc. Physica C 303, 33 (1998) |
電子全文 Fulltext |
本電子全文僅授權使用者為學術研究之目的,進行個人非營利性質之檢索、閱讀、列印。請遵守中華民國著作權法之相關規定,切勿任意重製、散佈、改作、轉貼、播送,以免觸法。 論文使用權限 Thesis access permission:校內校外完全公開 unrestricted 開放時間 Available: 校內 Campus: 已公開 available 校外 Off-campus: 已公開 available |
紙本論文 Printed copies |
紙本論文的公開資訊在102學年度以後相對較為完整。如果需要查詢101學年度以前的紙本論文公開資訊,請聯繫圖資處紙本論文服務櫃台。如有不便之處敬請見諒。 開放時間 available 已公開 available |
QR Code |