Development of angle dependent tunneling spectroscopy

2013 Fiscal Year Final Research Report

• Project/Area Number: 24654103
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: Kyoto University
• Principal Investigator: KASAHARA SHIGERU 京都大学, 理学(系)研究科(研究院), 助教 (10425556)
• Co-Investigator(Renkei-kenkyūsha): TERASHIMA Takashito 京都大学, 低温物質科学研究センター, 教授 (40252506)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Keywords: 異方的超伝導 / 低温物性 / 強相関電子系

Research Abstract

Tunneling spectrum under magnetic field and its in-plane angle dependence would offer a novel way to determine the superconducting gap symmetry in the unconventional superconductors. Development of high quality thin films and devices based on that are highly required. Conditions to make ultra-thin films of the parent compound of iron-based superconductors are established in this work. The gap symmetry of some iron-based superconductors having nodes is also investigated via quasi-particle excitation at low temperatures and their evolution for different scattering levels.

Research Products

• [Journal Article] Doping evolution of the quasiparticle excitations in heavily hole-doped Ba_<1-x>K_xFe_2As_2 : A possible superconducting gap with sign-reversal between hole pockets (2014)
  • Author(s): D. Watanabe, T. Yamashita, Y. Kawamoto, S. Kurata, Y. Mizukami, T. Ohta, S. Kasahara, M. Yamashita, T. Saito, H. Fukazawa, Y. Kohori, S. Ishida, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, A. B. Vorontsov, T. Shibauchi, and Y. Matsuda
  • Journal Title: Phys Volume: Rev. B 89 Pages: 115112
  • Peer Reviewed
• [Journal Article] A sharp peak of the zero-temperature penetration depth at optimal composition in the iron-based superconductor BaFe_2(As_<1->xP_x)_2 (2012)
  • Author(s): K. Hashimoto, K. Cho, T. Shibauchi, S. Kasahara, Y. Mizukami, R. Katsumata, Y. Tsuruhara, T. Terashima, H. Ikeda, M. A. Tanatar, H. Kitano, N. Salovich, R. W. Giannetta, P. Walmsley, A. Carrington, R. Prozorov, and Y. Matsuda
  • Journal Title: Science Volume: 336 Pages: 1554-1557
  • Peer Reviewed
• [Journal Article] Electronic nematicity above the structural and superconducting transition in BaFe_2(As_<1->xP_x)_2 (2012)
  • Author(s): S. Kasahara, H. J. Shi, K. Hashimoto, S. Tonegawa, Y. Mizukami, T. Shibauchi, K. Sugimoto, T. Fukuda, T. Terashima, A. H. Nevidomskyy, and Y. Matsuda
  • Journal Title: Nature Volume: 486 Pages: 382-385
  • Peer Reviewed
• [Journal Article] Nodal versus Nodeless Behaviors of the Order Parameters of LiFeP and LiFeAs Superconductors from Magnetic Penetration-Depth Measurements (2012)
  • Author(s): K. Hashimoto, S. Kasahara, R. Katsumata, Y. Mizukami, M. Yamashita, H. Ikeda, T. Terashima, A. Carrington, Y. Matsuda, and T. Shibauchi
  • Journal Title: Phys. Rev. Lett Volume: 108 Pages: 047003
  • Peer Reviewed
• [Journal Article] Epitaxial Thin Films of ATiO_<3->xH_x (A = Ba, Sr, Ca) with Metallic Conductivity (2012)
  • Author(s): Takeshi Yajima, Atsushi Kitada, Yoji Kobayashi, Tatsunori Sakaguchi, Guillaume Bouilly, Shigeru Kasahara, Takahito Terashima, Mikio Takano, and Hiroshi Kageyama
  • Journal Title: J. Am. Chem. Soc Volume: 134 Pages: 8782-8785
  • Peer Reviewed
• [Presentation] Optical conductivity of clean-limit superconductor LiFeAs (2014)
  • Author(s): R.P.S.M. Lobo, A.V. Pronin, G. Chanda, J. Wosnitza, S. Kasahara, T. Shibauchi, Y. Matsuda
  • Organizer: American Physical Society March Meeting
  • Place of Presentation: Denver, Colorado, USA
  • Year and Date: 20140303-07
• [Presentation] Nodal superconducting state in clean single crystals of FeSe (2014)
  • Author(s): S. Kasahara, T. Mikami, Y. Mizukami, Y. Kawamoto, S. Kurata, D. Watanabe, T. Shibauchi, Y. Matsuda, A.E. Bohmer, T. Wolf, C. Meingast, H. v. Lohneysen
  • Organizer: American Physical Society March Meeting
  • Place of Presentation: Denver, Colorado, USA
  • Year and Date: 20140303-07
• [Presentation] The gap structure of BaFe_2(As_<1->xP_x)_2 determined from specific heat measurements (2014)
  • Author(s): L. Malone, Y. Mizukami, P. Walmsley, C. Putzke, S. Kasahara, T. Terashima , T. Shibauchi, Y. Matsuda, A. Carrington
  • Organizer: American Physical Society March Meeting
  • Place of Presentation: Denver, Colorado, USA
  • Year and Date: 20140303-07
• [Presentation] Anomalous behaviour of critical fields near a superconducting quantum critical point in BaFe_2(As_<1->xP_x)_2 (2014)
  • Author(s): C. Putzke, A. Carrington, P. Walmsley , L. Malone, J.D. Fletcher, P. See, D. Vignolles, C. Proust , S. Badoux, S. Kasahara , Y. Mazukami, T. Shibauchi, Y. Matsuda
  • Organizer: American Physical Society March Meeting
  • Place of Presentation: Denver, Colorado, USA
  • Year and Date: 20140303-07
• [Presentation] Quasi-particle interference and possible orbital order in FeSe (2014)
  • Author(s): T. Hanaguri, T. Watashige, Y. Kohsaka, K. Iwaya, Y. Fu , S. Kasahara, D. Watanabe, Y. Mizukami, T. Mikami, Y. Kawamoto, S. Kurata, T. Shibauchi, Y. Matsuda, A. Bohmer, T. Wolf, C. Meingast, H. v. Lohneysen
  • Organizer: American Physical Society March Meeting
  • Place of Presentation: Denver, Colorado, USA
  • Year and Date: 20140303-07
• [Presentation] The low temperature Fermi surface of IrTe_2 probed by quantum oscillations (2014)
  • Author(s): Samuel Blake, Amalia Coldea, Matthew Watson, Arjun Narayanan, Alix McCollam, Shigeru Kasahara, Takuya Yamashita, Daiki Watanabe, Takasada Shibauchi, Yuji Matsuda, Robert Schoonmaker
  • Organizer: American Physical Society March Meeting
  • Place of Presentation: Denver, Colorado, USA
  • Year and Date: 20140303-07
• [Presentation] Influence of twin boundaries on superconducting gap nodes in FeSe single crystal studied by STM/STS (2014)
  • Author(s): T. Watashige, T. Hanaguri, Y. Kohsaka, K. Iwaya, Y. Fu, S. Kasahara, D. Watanabe, Y. Mizukami, T. Mikami, Y. Kawamoto, S. Kurata, T. Shibauchi, Y. Matsuda, A. Bohmer, T. Wolf, C. Meingast, H. v. Lohneysen
  • Organizer: American Physical Society March Meeting
  • Place of Presentation: Denver, Colorado, USA
  • Year and Date: 20140303-07
• [Presentation] Nodal s-wave superconductivity in iron based superconductors (2013)
  • Author(s): S. Kasahara
  • Organizer: IUMRS-ICA
  • Place of Presentation: Bangalore, India
  • Year and Date: 20131216-20
  • Invited
• [Presentation] BaFe_2(As_<1->xP_x)_2のバンド分散,フェルミ面の組成依存性 (2013)
  • Author(s): 吉田鉄平,出田真一郎,西一郎,L. C. C. Ambolode,鈴木博人,藤森淳,下志万貴博,品田慶,石坂香子,Walid Malaeb,辛埴,中島陽佑,安斎太陽,井野明洋,有田将司,生天目博文,谷口雅樹,組頭広志,小野寛太,笠原成,寺嶋孝仁,芝内孝禎,松田祐司,中島正道,内田慎一,富岡泰秀,伊藤利充,木方邦宏,李哲虎,伊豫彰,永崎洋,池田浩章,有田亮太郎,S. K. Mo,Z.X. Shen,Z. Hussain
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学,徳島県徳島市
  • Year and Date: 20130925-29
• [Presentation] アルカリ金属系鉄ニクタイドの単結晶作製と輸送係数測定 (2013)
  • Author(s): 遠藤僚太,綿重達哉,笠原成,芝内孝禎,松田祐司
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学,徳島県徳島市
  • Year and Date: 20130925-29
• [Presentation] FeSe純良単結晶における磁場侵入長および熱伝導率測定 (2013)
  • Author(s): 笠原成,渡邊大樹,水上雄太,三上拓也,川本雄太,藏田聡信,芝内孝禎,松田祐司,Anna Bohmer,Thomas Wolf,Peter Adelmann,Christoph Meingast
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学,徳島県徳島市
  • Year and Date: 20130925-29
• [Presentation] 電子線照射により点欠陥を導入したBaFe_2(As_<1->xP_x)_2の輸送現象測定 (2013)
  • Author(s): 三上拓也,水上雄太,川本雄太,藏田聡信,笠原成,松田祐司,芝内孝禎,M. Konczykowski,C. J. van der Beek,B. Boizot,R. Prozorov
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学,徳島県徳島市
  • Year and Date: 20130925-29
• [Presentation] 電子線照射したBaFe_2(As_<1->xP_x)_2における点欠陥の磁気的性質 (2013)
  • Author(s): 水上雄太,川本雄太,蔵田聡信,三上拓也,橋本顕一郎,笠原成,M. KonczykowskiA,C. J. van der BeekA,B. BoizotA,R. ProzorovB,Y. WangC,A. KreiselC,P. J. HirschfeldC,V. MishraD,松田祐司,芝内孝禎
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学,徳島県徳島市
  • Year and Date: 20130925-29
• [Presentation] 重い電子系ABAB'型人工超格子における空間反転対称性の超伝導への影響 (2013)
  • Author(s): 遠藤僚太,Swee K. Goh,下澤雅明,小林遼,西山卓也,渡邊大樹,池田浩章,笠原成,柳瀬陽一,寺嶋孝仁,芝内孝禎,松田祐司
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学,徳島県徳島市
  • Year and Date: 20130925-29
• [Presentation] 鉄系超伝導における量子臨界現象とネマティック電子状態の研究 (2013)
  • Author(s): 笠原成
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学,神奈川県平塚市
  • Year and Date: 20130327-30
  • Invited
• [Presentation] STM/STS測定で見たFeSe純良単結晶の超伝導ギャップ (2013)
  • Author(s): 綿重達哉,花栗哲郎,幸坂祐生,岩谷克也,付英双,笠原成,渡辺大樹,水上雄太,三上拓也,川本雄太,蔵田聡,芝内孝禎,松田祐司,A. Bohmer,T. Wolf,C. Meingast,H. v. Lohneysen
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学,神奈川県平塚市
  • Year and Date: 20130327-30
• [Presentation] FeSeにおける準粒子干渉効果 (2013)
  • Author(s): 花栗哲郎,綿重達哉,幸坂祐生,岩谷克也,付英双,笠原成,渡辺大樹,水上雄太,三上拓也,川本雄太,蔵田聡,芝内孝禎,松田祐司,A. Bohmer,T. Wolf,C. Meingast^C,H. v. Lohneysen
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学,神奈川県平塚市
  • Year and Date: 20130327-30
• [Presentation] FeSe純良単結晶における輸送現象測定 (2013)
  • Author(s): 遠藤僚太,山下卓也,三上拓也,笠原成,芝内孝禎,松田祐司,Anna Bohmer,Thomas Wolf,Christoph Meingast,Hilbert Lohneysen
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学,神奈川県平塚市
  • Year and Date: 20130327-30
• [Presentation] FeSeのレーザー角度分解光電子分光 (2013)
  • Author(s): 岡崎浩三,堀尾眞史,藤森淳,大田由一,山本遇哲,辛埴,渡部俊太郎,C.-T.Chen,笠原成,芝内孝禎,松田祐司,A. Bohme,T. Wolf,P. Adelmann,C. Meingast,H. v. Loehneysen
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学,神奈川県平塚市
  • Year and Date: 20130327-30
• [Presentation] 熱伝導率測定からみたオーバードープ領域の(Ba_<1->xK_x)Fe_2As_2における超伝導ギャップ構造 (2013)
  • Author(s): 渡邊大樹,山下卓也,笠原成,太田卓見,山下穣,齊藤拓,深澤英人,小堀洋,石田茂之,木方邦宏,伊豫彰,李哲虎,永崎洋,Anton B. Vorontsov,芝内孝禎,松田祐司
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学,広島県東広島市
  • Year and Date: 20130326-29
• [Presentation] 磁場侵入長測定からみたオーバードープ領域の(Ba_<1->xK_x)Fe_2As_2における超伝導ギャップ構造 (2013)
  • Author(s): 川本雄太,水上雄太,蔵田聡信,笠原成,齊藤拓,深澤英人,小堀洋,石田茂之,木方邦宏,伊豫彰,李哲虎,永崎洋,芝内孝禎,松田祐司
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学,広島県東広島市
  • Year and Date: 20130326-29
• [Presentation] 磁場侵入長測定から見たLaFeAsO1-yの超伝導ギャップ構造のドーピング依存性 (2013)
  • Author(s): 蔵田聡信,水上雄太,川本雄太,笠原成,石角元志,石田茂之,鬼頭聖,伊豫彰,永崎洋,社本真一,松田祐司,芝内孝禎
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学,広島県東広島市
  • Year and Date: 20130326-29
• [Presentation] 電子線照射により不純物散乱を制御したBaFe_2(As_<1->xP_x)_2における超伝導ギャップ構造の変化 (2013)
  • Author(s): 水上雄太,川本雄太,橋本顕一郎,笠原成,M. Konczykowski,C. J. van der Beek,B. Boizot,R. Prozorov,Y. Wang,A. Kreisel,P. J. Hirschfeld,V. Mishira,芝内孝禎,松田祐司
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学,広島県東広島市
  • Year and Date: 20130326-29
• [Presentation] PLD法によるBaFe2As2超薄膜の作製 (2013)
  • Author(s): 綿重達哉,笠原成,下澤雅明,石井航,芝内孝禎,寺嶋孝仁,松田祐司
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学,広島県東広島市
  • Year and Date: 20130326-29
• [Presentation] Electron irradiation of iron-based superconductors (2013)
  • Author(s): S. Demirdis, C.J. van der Beek, M. Konczykowski, S. Kasahara, T. Terashima, R. Okazaki, T. Shibauch, Y. Matsuda, D. Colson, P. Gierlowski, R. Prozorov
  • Organizer: American Physical Society March Meeting
  • Place of Presentation: Baltimore, Maryland, USA
  • Year and Date: 20130318-22
• [Presentation] Thermodynamic signatures of quantum criticality in BaFe_2(As_<1->xP_x)_2 (2013)
  • Author(s): P. Walmsley, C. Putzke, L. Malone, S. Kasahara, T. Shibauchi, Y. Matsuda, A. Carrington
  • Organizer: American Physical Society March Meeting
  • Place of Presentation: Baltimore, Maryland, USA
  • Year and Date: 20130318-22
• [Presentation] Impurity-induced changes in the superconducting order parameter in iron-based superconductors BaFe_2(As_<1->xP_x)_2 (2013)
  • Author(s): Yuta Mizukami, Y. Kawamoto, K. Hashimoto, S. Kasahara, M. Konczykowski, C.J. van der Beek, B. Boizot, R. Prozorov, Y. Wang , A. Kreisel, .J. Hirschfeld, V. Mishra, Y. Matsuda, T. Shibauchi
  • Organizer: American Physical Society March Meeting
  • Place of Presentation: Baltimore, Maryland, USA
  • Year and Date: 20130318-22
• [Presentation] Nematic transition and hidden quantum critical point in iron-pnictide superconductors (2013)
  • Author(s): Shigeru Kasahara
  • Organizer: American Physical Society March Meeting
  • Place of Presentation: Baltimore, Maryland, USA
  • Year and Date: 20130318-22
• [Presentation] Sign-changing nodal s-wave gap in heavily over doped (Ba_<1->xK_x)Fe_2As_2 evidenced from thermal-transport measurement (2013)
  • Author(s): Daiki Watanabe, Shigeru Kasahara, Takuya Yamashita, Takumi Ota, Takasada Shibauchi, Yuji Matsuda, Minoru Yamashita, Hideto Fukazawa, Taku Saito, Yoh Kohori, Shigeyuki Ishida, Kunihiro Kiho, Chul-Ho Lee, Akira Iyo, Hiroshi Eisaki, Anton Vorontsov
  • Organizer: American Physical Society March Meeting
  • Place of Presentation: Baltimore, Maryland, USA
  • Year and Date: 20130318-22
• [Presentation] Angle Dependent Specific Heat Study of BaFe_2(As_<0.7>P_<0.3>)_2 (2013)
  • Author(s): Liam Malone, Yuta Mizukami, Philip Walmsley, S. Kasahara, T. Shibauchi, Y. Matsuda, Antony Carrington
  • Organizer: American Physical Society March Meeting
  • Place of Presentation: Baltimore, Maryland, USA
  • Year and Date: 20130318-22
• [Presentation] A de Haas-van Alphen study of the Fermi surface of LiFeP (2013)
  • Author(s): C. Putzke, A. Carrington, I. Guillamon, A. Coldea, M. Watson, D. Vignolles, D. LeBoeuf, A. McCollam, I.I. Mazin, S. Kasahara, T. Terashima, T. Shibauchi, Y. Matsuda
  • Organizer: American Physical Society March Meeting
  • Place of Presentation: Baltimore, Maryland, USA
  • Year and Date: 20130318-22
• [Presentation] (Ba_<1->xK_x)Fe_2As_2のホールドープエンド近傍における超伝導ギャップ構造(熱伝導率測定) (2012)
  • Author(s): 山下卓也,渡邊大樹,笠原成,山下穣,芝内孝禎,松田祐司,齊藤拓,深澤英人,小堀洋,木方邦宏,伊豫彰,李哲虎,永崎洋
  • Organizer: 日本物理学会2012年秋季大会
  • Place of Presentation: 横浜国立大学,神奈川県横浜市
  • Year and Date: 20120918-21
• [Presentation] Ba_1-_xK_x)Fe_2As_2のホールドープエンド近傍における超伝導ギャップ構造(磁場侵入長測定) (2012)
  • Author(s): 川本雄太,水上雄太,S.K.Goh,笠原成,芝内孝禎,松田祐司,齊藤拓,深澤英人,小堀洋,木方邦宏,伊豫彰,李哲虎,永崎洋
  • Organizer: 日本物理学会2012年秋季大会
  • Place of Presentation: 横浜国立大学,神奈川県横浜市
  • Year and Date: 20120918-21
• [Presentation] LaFeAsO_<1-y>の最適ドープ試料における磁場侵入長測定から見た超伝導ギャップ構造 (2012)
  • Author(s): 水上雄太,川本雄太,S. K. Goh,笠原成,石角元志,石田茂之,鬼頭聖,伊豫彰,永崎洋,社本真一,寺嶋孝仁,芝内孝禎,松田祐司
  • Organizer: 日本物理学会2012年秋季大会
  • Place of Presentation: 横浜国立大学,神奈川県横浜市
  • Year and Date: 20120918-21
• [Presentation] 鉄系超伝導体BaFe_2(As_<1->xP_x)_2における不純物効果 (2012)
  • Author(s): 川島裕貴,下田愛子,家哲也,北川俊作,石田憲二,笠原成,芝内孝禎,松田祐司,寺嶋孝仁
  • Organizer: 日本物理学会2012年秋季大会
  • Place of Presentation: 横浜国立大学,神奈川県横浜市
  • Year and Date: 20120918-21
• [Presentation] Contrasts in the normal and superconducting properties of LiFeAs and LiFeP superconductors (2012)
  • Author(s): S. Kasahara, K. Hashimoto, H. Ikeda, T. Terashima, Y. Matsuda and T. Shibauchi
  • Organizer: The 10^<th> international conference on Materials and Mechanisms of Superconductivity High Temperature Superconductors (M^2S-HTSC)
  • Place of Presentation: Omni Shoreham Hotel, Washington DC, USA
  • Year and Date: 20120729-0803
• [Remarks]
  • URL: http://kotai2.scphys.kyoto-u.ac.jp/