Shu-Ichiro Suzuki

ORCID: 0000-0002-8527-2464
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About
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Research Areas
  • Physics of Superconductivity and Magnetism
  • Advanced Condensed Matter Physics
  • Sarcoma Diagnosis and Treatment
  • Quantum and electron transport phenomena
  • Topological Materials and Phenomena
  • Magnetic and transport properties of perovskites and related materials
  • Peripheral Neuropathies and Disorders
  • Magnetic properties of thin films
  • Bone Tumor Diagnosis and Treatments
  • Metastasis and carcinoma case studies
  • High-pressure geophysics and materials
  • Vascular Tumors and Angiosarcomas
  • Rare-earth and actinide compounds
  • Myasthenia Gravis and Thymoma
  • Traumatic Brain Injury and Neurovascular Disturbances
  • Cancer Diagnosis and Treatment
  • Neuroendocrine Tumor Research Advances
  • Cold Atom Physics and Bose-Einstein Condensates
  • Knee injuries and reconstruction techniques
  • Total Knee Arthroplasty Outcomes
  • Cardiac tumors and thrombi
  • Management of metastatic bone disease
  • Reconstructive Surgery and Microvascular Techniques
  • Atomic and Subatomic Physics Research
  • Iron-based superconductors research

University of Twente
2019-2025

National Institute of Technology
2025

Shinshu University
1994-2023

Nagoya University
2018-2023

Matsumoto University
2021

Kindai University Hospital
2019

Sapporo Medical University
2019

Ōtani University
1994-2018

Hokkaido University
2014-2017

Niigata City General Hospital
1998

The diamagnetism is an essential property of all superconductors. However, we will show that small topological (or unconventional) superconductors can be intrinsically paramagnetic by solving the quasiclassical Eilenberger equation and Maxwell self-consistently on two-dimensional superconducting disks in weak magnetic fields. Because topologically nontrivial character wave function, unconventional host zero-energy surface Andreev bound states, which always accompany so-called odd-frequency...

10.1103/physrevb.89.184508 article EN Physical Review B 2014-05-14

We study theoretically the spontaneous edge current in a small chiral superconductor with surface roughness. obtained self-consistent solutions of pair potential and vector by solving quasiclassical Eilenberger equation Maxwell simultaneously. then employed them to calculate numerically spatial distribution superconductor. The characteristic behavior depends strongly on symmetries order parameters such as $p$-, $d$-, $f$-wave pairing. is robust under roughness $p$- $d$-wave superconductors....

10.1103/physrevb.94.155302 article EN Physical review. B./Physical review. B 2016-10-07

We theoretically study the effects of surface roughness on magnetic response small unconventional superconductors by solving Eilenberger equation for quassiclassical Green function and Maxwell vector potential simultaneously self-consistently. The paramagnetic phase spin-singlet $d$-wave superconducting disks is greatly suppressed roughness, whereas that spin-triplet $p$-wave robust even in presence roughness. This difference derives from orbital symmetry odd-frequency Cooper pairs appearing...

10.1103/physrevb.91.214510 article EN Physical Review B 2015-06-17

We discuss the minimum value of zero-bias differential conductance ${G}_{\mathrm{min}}$ in a junction consisting normal metal and nodal superconductor preserving time-reversal symmetry. Using quasiclassical Green function method, we show that is quantized at $(4{e}^{2}/h){N}_{\mathrm{ZES}}$ limit strong impurity scatterings zero temperature. The integer ${N}_{\mathrm{ZES}}$ represents number perfect transmission channels through junction. An analysis chiral symmetry Hamiltonian indicates...

10.1103/physrevb.94.054512 article EN Physical review. B./Physical review. B 2016-08-18

Cytosolic Ca2+ and protein kinase C (PKC) may regulate the myogenic contraction of arterial myocytes. The role these second messengers is examined in skeletal muscle small arteries, which have strong activity, mesenteric weak activity. vessels were isolated cannulated. inner diameter was measured with a video-digitizing system. concentration assessed by fura 2. Skeletal arteries dilated from 122 +/- 6 to 153 microm immediately after transmural pressure change 40 100 mmHg constricted 121 5...

10.1152/ajpheart.1997.272.3.h1165 article EN AJP Heart and Circulatory Physiology 1997-03-01

In our previous study, we reported that the administration of T4 to patients with Graves' disease who were under treatment methimazole (MMI) decreased level antibodies thyroid-stimulating hormone (TSH) receptors and rate recurrence hyperthyroidism. this effect on postpartum hyperthyroidism was examined. Seventy-eight had been treated MMI for 1-3 yr before pregnancy, discontinued 5-6 months after onset pregnancy because levels TSH during early pregnancy. The then divided into two groups....

10.1210/jcem.75.1.1642700 article EN The Journal of Clinical Endocrinology & Metabolism 1992-07-01

The fragility of the chiral surface current in (${d}_{z\phantom{\rule{0}{0ex}}x}$ + $i\phantom{\rule{0}{0ex}}{d}_{y\phantom{\rule{0}{0ex}}z}$)-wave superconductor is theoretically demonstrated. robustness determined by whether subdominant $s$-wave Cooper pairs are present at surface.

10.1103/physrevresearch.4.l042020 article EN cc-by Physical Review Research 2022-11-01

Our objective was to predict the knee extension strength and post-operative function in quadriceps resection for soft-tissue sarcoma of thigh.A total 18 patients (14 men, four women) underwent or partial thigh between 2002 2014. The number resected surveyed, measured with Biodex isokinetic dynamometer system (affected side/unaffected side) relationships these were examined. Musculoskeletal Tumor Society (MSTS) score, Toronto Extremity Salvage Score (TESS), European Quality Life-5 Dimensions...

10.1302/2046-3758.56.2000631 article EN cc-by-nc-nd Bone and Joint Research 2016-06-01

M-mode and two-dimensional echocardiographic features of mitral ring abscess are described. A round, dense echo mass between the posterior leaflet left ventricular wall was demonstrated in long- short-axis views ventricle. The diagnosis confirmed at surgery. superiority echocardiography over for evaluating patients with is also discussed.

10.1161/01.cir.65.4.816 article EN Circulation 1982-04-01

The robustness of the chiral surface current superconductors against roughness is studied utilizing quasiclassical Eilenberger theory. We consider general where pair potential given by spherical harmonics ${Y}_{l}^{m}$ such that $(l,m)=(1,\ifmmode\pm\else\textpm\fi{}1)$ state corresponds to a $({p}_{x}\ifmmode\pm\else\textpm\fi{}i{p}_{y})$-wave superconductor. self-consistent calculations demonstrate determined whether subdominant $s$-wave Cooper pairs are induced disorder. act as an...

10.1103/physrevb.108.134501 article EN Physical review. B./Physical review. B 2023-10-02

We examine the tunneling spectroscopy of three-dimensional normal-$\mathrm{metal}/{\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$ junctions as an experimental means to identify pairing symmetry in ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$. In particular, we consider three different possible states ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$: spin-singlet chiral $d$-wave, spin-triplet helical $p$-wave, and spin-nematic $f$-wave ones, all which are consistent with recent nuclear-magnetic-resonance experiments [A....

10.1103/physrevb.101.054505 article EN publisher-specific-oa Physical review. B./Physical review. B 2020-02-12

Andreev bound states (ABS) occur in Josephson junctions when the total phase of and normal reflections is a multiple $2\pi$. In ballistic with an applied voltage bias, quasi-particle undergoes before entering leads, resulting peaks current-voltage $I(V)$ curve. Here we present general model for spin-active interlayers i.e., magnetic or topological materials broken time-reversal symmetry. We investigate how ABS change peak positions shape $I(V)$, which becomes asymmetric single incident...

10.1103/physrevb.107.184510 article EN Physical review. B./Physical review. B 2023-05-18

The Yu-Shiba-Rusinov (YSR) state appears as a bound of quasiparticle at magnetic atom embedded in superconductor. We discuss why the YSR has energy below superconducting gap and pair potential changes sign atom. Although superconductor been considered breaker since 1960s, we propose an alternative physical picture to explain these reasons. analytical expression Green's function indicates that converts spin-singlet $s$-wave Cooper into odd-frequency pairs rather than breaking it pairing...

10.1103/physrevb.106.104518 article EN Physical review. B./Physical review. B 2022-09-29

After more than 25 years of research, three even-parity superconducting states—the d+id-wave, d+ig-wave, and s+id-wave states—have emerged as leading candidates for the states Sr2RuO4. In present work, we propose a tunneling spectroscopy experiment distinguishing among these states. The key component our proposal is that examine conductance spectra normal-metal/Sr2RuO4 junctions with various angles between junction interface crystal axis angle dependence shows unique pattern in each state,...

10.1103/physrevresearch.3.l032062 article EN cc-by Physical Review Research 2021-09-13

We study quasiparticle states on a surface of topological insulator (TI) with proximity-induced superconductivity under an external magnetic field. An applied field creates two Majorana bound states: vortex state localized inside core and exterior along circle centered at the core. calculate spin-resolved local density (LDOS) demonstrate that shrinking radius state, predicted in R. S. Akzyanov et al., Phys. Rev. B 94, 125428 (2016), strong can be seen LDOS without smeared out by...

10.1103/physrevb.97.144516 article EN Physical review. B./Physical review. B 2018-04-24

We study the tunneling conductance of a ballistic normal metal / ferromagnet spin-triplet superconductor junction using extended Blonder-Tinkham-Klapwijk formalism as model for $c$-axis oriented Au SrRuO$_{3}$ Sr$_{2}$RuO$_{4}$ junction. compare chiral $p$-wave (CPW) and helical (HPW) pair potentials, combined with magnetization directions parallel perpendicular to interface. For fixed $\theta_{M}$, where $\theta_{M}$ is direction in measured from $c$-axis, CPW HPW clearly show different...

10.1103/physrevb.98.014508 article EN Physical review. B./Physical review. B 2018-07-13

We theoretically study the local density of states in superconducting proximity structure where two terminals are attached to a side surface normal-metal wire. Using quasiclassical Green's function method, energy spectrum is obtained for both spin-singlet $s$-wave and spin-triplet $p$-wave junctions. In cases, decay length effect at zero temperature limited by depairing due inelastic scatterings. addition effect, junctions, depends sensitively on transparency junction interfaces, which...

10.1103/physrevb.100.024511 article EN Physical review. B./Physical review. B 2019-07-18

We theoretically investigate the tunneling conductance of ($d+ip$)-wave superconductor that was recently proposed to be realized at (110) surface a high-${T}_{c}$ cuprate superconductor. Utilizing quasiclassical Eilenberger theory, we obtain self-consistent pair potentials and differential normal-metal/($d+ip$)-wave junction. demonstrate zero-bias peak $d$-wave is robust against spin-triplet $p$-wave subdominant order, even though it fragile spin-singlet $s$-wave one. Comparing our numerical...

10.1103/physrevb.103.184515 article EN Physical review. B./Physical review. B 2021-05-24
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