Q4(Graduation Research) “Superconductivity and magnetism”

Teachers: Yoshiteru Maeno (Room 138, Building 5), Kenji Ishida (Room 140, Building 5), Shingo Yonezawa (Room 139, Building 5), Shunsaku Kitagawa (Room 140, Building 5) Teaching Assistant (TA) Katsuki Kinjo

  • Introduction
  • Schedule
  • Seminar
  • Experiment content
  • Members and graduation thesis titles

Introduction

In this project, we will study various phenomena that many electronic systems show, such as superconductivity and spin order.

The first half of the year will focus on seminars for understanding the fundamentals of superconductivity, such as Bardeen-Cooper-Schrieffer (BCS) theory.

In the latter half, we chose our own research themes and synthesized materials that exhibit various superconductivity and magnetic properties, including spin triplet superconductors, and we developed specific heat at low temperatures, electrical resistivity, magnetic susceptibility, and nuclear magnetic resonance (NMR). ), Etc., and aim to understand their quantum physical properties.

In each case, each student can study along with his or her own graduation thesis theme, and at the same time, challenge themes that include the part where the answer is not known to anyone. During my graduation research, my goal is to have the students yell at me at least once.

2019 schedule

Monday, June 3, 2019Small presentation
September 2019 (after the examination ends)Experiment start
Monday, December 23, 2019Interim presentation
Monday, February 10, 2020Final presentation
February 13, 2020 (Thursday)Deadline for graduation thesis version 1 submission

2018 schedule

Tuesday, June 19, 2018Small presentation (starts at 16:30)
September 2018 (after the examination ends)Experiment start
December 18, 2018 (Tue)Interim presentation (starts at 13:30)
February 8, 2019 (Friday)Final presentation
February 8, 2019 (Friday)Deadline for graduation thesis version 1 submission

Seminar

In the weekly seminar, you will learn the basic properties of superconductivity, Bardeen-Cooper-Schrieffer (BCS) theory, Ginzburg-Landau theory, etc. using superconducting textbooks. It will be a learning that comprehensively applies knowledge of quantum mechanics, statistical thermodynamics, and electromagnetics.

The textbooks I have used so far are:

2019[First half] Hiroyuki Shiba, “Electron theory of solids” (Wako Systems Laboratories, 2010).
[Second half] Stephen Blundell, “Magnetism in Condensed Matter” (Oxford, 2001).
2018[First half] Hiroyuki
Shiba, “ Electronics of solids” (Wako Systems Laboratories, 2010). [Latter half] Kazuo Ueda, “Introduction to magnetism” (Shikabo, 2011).
2017[First half] Hiroyuki
Shiba, “ Electronics of solids” (Wako Systems Laboratories, 2010). [Latter half] Kazuo Ueda, “Introduction to magnetism” (Shikabo, 2011).
2016[First term] Hiroyuki Shiba, “Electron theory of solids” (Wako Systems Laboratories, 2010).
PG de Gennes, “Superconductivity of Metals and Alloys” revised ed. (Westview Press, 1999).
[Latter term] Hideo Aoki, “Super” Introduction to Conduction ”Second Edition (Sohkabo, 2009).
2015[First half] Hiroyuki
Shiba, “ Electron theory of solids” (Wako Systems Laboratories, 2010). [Latter half] Michael Tinkham, “Introduction to Superconductivity” 2nd ed. (Dover Publications, Inc., 1996).
2014[First half] Hiroyuki
Shiba, “ Electron theory of solids” (Wako Systems Laboratories, 2010). [Latter half] Michael Tinkham, “Introduction to Superconductivity” 2nd ed. (Dover Publications, Inc., 1996).
2013[First term] Hiroyuki Shiba, “Electronics of Solids” (Wako Systems Laboratories, 2010).
AA Abrikosov, “Fundamentals of the Theory of Metals” (North-Holland, 1988) Part II (Superconducting Metals).
[Latter term] House Yasuhiro, “Superconductivity” (Asakura Shoten, 2005).
2012Hiroshi Shiba, “Electronics of Solids” (Maruzen, 1996).
2011Hiroshi Shiba, “Electronics of Solids” (Maruzen, 1996).
2010Hiroshi Shiba, “Electronics of Solids” (Maruzen, 1996).
FY2009Hiroshi Shiba, “Electronics of Solids” (Maruzen, 1996).
2008Hiroshi Shiba, “Electronics of Solids” (Maruzen, 1996).
FY2007Hiroshi Shiba, “Electronics of Solids” (Maruzen, 1996).
2006M. Tinkham, “Introduction to Superconductivity” 2nd ed. (McGraw-Hill, 1975, 1996).
2005Hiroshi Shiba, “Electronics of Solids” (Maruzen, 1996).
2004M. Tinkham, “Introduction to Superconductivity” 2nd ed. (McGraw-Hill, 1975, 1996).
2003Hiroshi Shiba, “Electronics of Solids” (Maruzen, 1996).
2002AA Abrikosov, “Fundamentals of the Theory of Metals” (North-Holland, 1988) Part II (Superconducting Metals).
2001PG de Gennes, “Superconductivity of Metals and Alloys” (Addison-Wesley, 1966, 1989).

Experiment content

In conducting research, there are some themes with a little emphasis on sample synthesis and some with a focus on the production of measuring devices. Examples of recent themes include spin triplet superconductivity research, topological insulator / superconductor research, and heavy electron-based materials and iron-based superconductor-related materials. With either theme, you can get a little touch on the latest research on superconductivity and magnetic materials.

In sample synthesis, we will challenge the growth of single crystals using infrared heating furnaces and the challenge of synthesizing new materials using various synthesis furnaces.

Most of the measurements are low-temperature experiments using liquid helium. As equipment, we also use a helium 3 refrigerator that can cool to 0.3 K and a helium 3-helium 4 dilution refrigerator that can cool to 10 mK. In addition, there are also themes including the production of super-sensitive magnetization measurement devices using superconducting quantum interference devices (SQUIDs) and sample rotation devices using piezo elements. Then, through the measurement of electrical resistivity, magnetic susceptibility, specific heat, nuclear magnetic resonance, etc., we will explore various quantum properties of superconductors and magnetic materials.

Members and graduation thesis titles

2019

Keito ObataSearch for new superconductors
Kinoshita YudaiNuclear magnetic pole resonance of nanoparticles
Hidemitsu TakahashiDevelopment of simultaneous measurement method for nuclear magnetic resonance / nuclear quadrupole resonance and electrical resistance
Yata Utana-eStudy of Sr 2 RuO 4

2018

Kawaguchi MayoSearch for new superconductors
Mayu KofunNuclear quadrupole resonance in heavy electron superconductors.
Ryo TaniguchiNew equipment development
Satoshi MatsuzakiNuclear magnetic resonance of ferromagnetic superconductors

2017

Okuno TomonoriNuclear magnetic resonance of nanoparticles
Katsuki KaneshiroNuclear quadrupole resonance of Sr 2 RuO 4
Takasuka YukieExperiment on metal-insulator transition of Ca 2 RuO 4
Nao TeraoNuclear magnetic resonance of ferromagnetic superconductors
Miyoshi TakutoStudy of Sr 2 RuO 4 junction system

2016

Ai ShishikuraExperiment on metal-insulator transition of Ca 2 RuO 4
Haruki SuwaSingle crystal growth of Sr 2 RuO 4
Kazushi YonekawaNuclear magnetic resonance of nanoparticles
KuwayamaNuclear quadrupole resonance in heavy electron antiferromagnets

2015

Urai TomotakaStudy of U 6 Co using 59 Co NQR
Okamoto KenshiroSingle crystal U 6 of Co 59 studies with Co-NMR
Kunieda HonestProximity effect of spin triplet superconductors in SrRuO 3 / Sr 2 RuO 4 hybrid structure
Nakata MasaruDevelopment of specific heat measurement cell

2014

Atsushi IkedaHole doping into ruthenium oxide
Ryoichi TakagiSynthesis of magnetic materials and search for magnetic order
Kenji TajiriSpecific heat measurement of topological superconductors
Naruzuka MasahiroToward the measurement of novel substances. Launch of 3 He- 4 He dilution refrigerator for magnetic resistance measurement.

2013

Sugimoto YusukeSrTiO 3 oxygen isotopic substitution effect on field-induced superconductivity
Yousuke HanaokaStudy of physical properties of iron-based superconductor LaFe (As 1-x P x ) O using nuclear magnetic resonance method
Masahiro MasagoStudy of Ba 2 Bi 3 using 209 Bi-NMR / NQR
Yasui CourageLittle-Parks oscillations in Sr 2 RuO 4 and Nb-μ rings

2012

Kenji AraiIrSe-based NMR study
Takenaka KoheiStudy of electric field induced superconductor
Daisuke ShibataThermal Hall effect research
Daisuke SugimotoResearch using NQR of UCoGe

2011

Yuuki KawashimaSearch for novel superconductors
Aiko ShimodaSynthesis and evaluation of iron-based superconductors
Kei TateishiSynthesis of heavy electronic materials
MiyazakiConduction properties of Sr 2 RuO 4 micro sample

2010

Tomohiro KajikawaThermal measurement of Sr 2 RuO 4
Nakamura MasayukiSearch for novel superconductors
Masakigawa HirokiStudy of iron-based superconductors using NMR / NQR

FY2009

IshikawaStudy on transport properties of triangular lattice magnets
Kousuke KarubeNMR / NQR study of heavy electron compounds
Atsushi FenceStudy of iron-based superconducting materials using NMR / NQR
Junki MatsuzakaSearch for novel superconducting materials

2008

Haruka TaniguchiStudy of superconducting proximity effect
Tatsuya YamagishiStudy of electric field effect on oxides
Taisuke HattoriStudy of heavy electron superconductivity by NMR / NQR
Tatsuya IkedaStudy of Fe-based superconductors by NMR

FY2007

Shunsaku KitagawaDesign and synthesis of conductive oxides
Nakagawa RyujiFabrication and evaluation of superconducting junction of Sr 2 RuO 4
Junichi OkamotoStudy of heavy electron superconductivity by NMR
Yamamoto ComeStudy of Fe-based superconductors by NMR

2006

Nobuhiro ShimaiStudy of electronic states of conductive oxides
Satoshi NakamuraStudy of spin triplet superconducting network in Granular Sr 2 RuO 4
Yujiro HayashiStudy of superconducting gap by NMR
Yano ShiroUniaxial pressure dependence of superconducting transition temperature in Sr 2 RuO 4

2005

Shinoda OnoderaMagnetocaloric effect spin triplet superconductor Sr by 2 RuO 4 Detection of new superconducting phases
Kentaro KugaLow-temperature physical property research and superconducting search for new heavy electronic materials
Nakamura ShujiOptimization of single crystal growth of Sr 2 RuO 4 and change of superconducting transition temperature with uniaxial pressure
Murakami TakayukiMagnetic relaxation simulation of spin ice

2004

Takashi OnishiQuasi-two-dimensional Mott transition system Ca 2-x Sr x RuO 4 Physical properties near the metal insulator transfer point (x = 0.2)
Kano saintAdiabatic demagnetization cooling using paramagnetic salt CMN Evaluation of thermal switches and cells for measurement of systems with geometric frustration
Shunichiro TachibanaUniaxial pressure dependence of superconducting transition temperature in Sr 2 RuO 4 -Ru eutectic
Asahi HisadaGeometric frustration magnetic relation
Daisuke HiranoStudy of sample dependence of Na x CoO 2 · yH 2 O using Co-NQR

2003

Soyasu KamataGeometrically frustrated magnetic Mott insulator and metal-insulator transition
Hiroshi TonomuraGeometric frustration magnetic relation
Yusuke Nakai101 3K phase as impurities viewed from Ru-NQR and Sr 2 RuO 4 -Ti, Ca-based
Tatsuro YugeMagnetic cooling using residual entropy of pyrochlore oxide Dy 2 Ti 2 O 7
Yamashita MakotoTransition temperature of 3K phase in Sr 2 RuO 4 -Ru eutectic system

2002

Yoshihiko IharaCu-NMR-NQR of heavy electron system YbCu 5
Isao SatoExperiment of change of transition temperature due to uniaxial pressure in c-axis direction for Sr 2 RuO 4 using SQUID
Go SatoNMR study of LaFe 4 P 12
Takayuki MorimotoIsotope effect of 3K superconductor Sr 2 RuO 4 -Ru eutectic
Shingo YonezawaSynthesis of Ag 5 Pb 2 O 6 and measurement of physical properties

2001

Kentaro KitagawaSample dependence of superconducting two-step transition of Sr 2 RuO 4 due to AC susceptibility
Osamu SakaiLow temperature properties of Pyrochlore type oxide Dy 2 Zr 2 O 7
OyaLow temperature physical properties of metal for hydrogen introduction
Tran Thanh TrungAngle-Dependent Magnetoresistance Oscillation in Organic Superconductor β- (BDA-TTP) 2 SbF 6
Kentaro YanoSuperconductivity of pyrochlore oxide Cd 2 Re 2 O 7

2000

Ryuji AzumaLow temperature properties of Pyrochlore type oxide Dy 2 Ti 2 O 7
Masahiro YamadaSuperconductivity of metal hydride
Masaki YoshiokaObservation of superconducting transition of Sr 2 RuO 4 -Ru eutectic by high-sensitivity magnetometer using SQUID
Shoji HaritaIn -plane and inter-plane electrical resistivity of Sr 2 Ru 1- x Ti x O 4
Yukihide TsujiElectric field effect doping with Al 2 O 3 as insulator film

1999 fiscal year

Suzuki MakotoThe effects of Coulomb interaction and impurity density to the localization length in one-dimentional electrons
Yukishima Daiki‘Metallic Spin Ice’ physical properties of new substance Ln 2 Ir 2 O 7 ( Ln = Pr, Sm)
Masahiko WadaNew Sr 2 RuO 4 -Ru eutectic showing superconductivity at c = 3K and angular dependence of upper critical magnetic field
Kubo TakuyuMeasurement of Meissner effect using SQUID
Nishimori MannedPdH X superconductivity

1998 year

Satoshi KamiyaApplication of the theory of weak localization to highly conductive polyacetylene.
Kazuhiko DeguchiObservation of superconducting transition of (BEDT-TTF) 4 Hg 2.89 Br 8 by high-sensitivity magnetic susceptibility measurement system using SQUID
Shuichi NagaiUniaxial pressure effect of superconductivity in Sr 2 RuO 4
Tetsuji KamitoMagnetic field direction dependence of Shubnikov-de Haas oscillation amplitude in organic superconductor κ- (BEDT-TTF) 2 Cu (NCS) 2
Takamasa IwamotoSr by impurity effect 2 RuO 4 induced magnetic order in
Naoki OsawaSynthesis of new layered transition metal oxide LnSr 2-x La x (Ni, Zn) 2 RuO 8 (Ln = Sm, Eu, Gd) and search for its superconducting phase

1997

Takashi AkimaSuperconducting parameters of Sr 2 RuO 4
Takuji NomuraStudy of magnetic flux pinning in Bi 2 Sr 2 CaCu 2 O 8 + δ using ultrasonic electromagnetic wave conversion
Fukasawa HidetoExtending the Kadowaki-Woods relationship to an anisotropic system
Masanari MinakataExtending the Kadowaki-Woods relationship to an anisotropic system
Hiroto AdachiMeasurement of Fermi surface of Sr 2 RuO 4 by analysis of angle-dependent magnetoresistive vibration
Shigeki NihariConstruction of adiabatic specific heat measuring device and measurement of specific heat of Sr 2 RuO 4

1996

Hiroshi IshiharaOrganic superconductivity
KinkaieiTrial of metallization by substitution of Mott insulator Ca 2 RuO 4
Yoshiro ShimojoOrganic superconductivity
Teruhisa TakedaSr 2 RuO 4 Meissner effect