Tadashi Machida

Update : 7th, February, 2020

Publication List

2020

Scalable Majorana vortex modes in iron-based superconductors

Ching-Kai Chiu, T. Machida, Yingyi Huang, T. Hanaguri, Fu-Chun Zhang
Science Advances (Accepted),arXiv:1904.13374v1

Microscopic characterization of superconducting gap function in Sn1-xInxTe

T. Nomoto, M. Kawamura, T. Koretsune, R. Arita, T. Machida, T. Hanaguri, M. Kriener, Y. Taguchi, Y. Tokura
Physical Review B 101, 014505 (2020)

2019

Zero-energy vortex bound state in the superconducting topological surface state of Fe(Se,Te)

T. Machida, Y. Sun, S. Pyon, S. Takeda, Y. Kohsaka, T. Hanaguri, T. Sasagawa, T. Tamegai
Nature Materials 18, 811 (2019)
arXiv:1812.08995
Press release

2018

A scanning tunneling microscope for spectroscopic imaging below 90 mK in magnetic fields up to 17.5 T

T. Machida, Y. Kohsaka, T. Hanaguri
Rev. Sci. Instrum. 89, 093707
arXiv:1807.08989

Two distinct superconducting pairing states divided by the nematic end point in FeSe1-xSx

T. Hanaguri, K. Iwaya, Y. Kohsaka, T. Machida, T. Watashige, S. Kasahara, T. Shibauchi, Y. Matsuda
Sci. Adv. 4, eaar6419 (2018)
arXiv:1710.02276

2017

Appearance of a Domain Structure and Its Electronic states in Iron Doped 1T-TaS2 Observed by Scanning Tunneling Microscopy and Spectroscopy

Y. Fujisawa, T. Shimabukuro, H. Kojima, K. Kobayashi, T. Machida, S. Demura, and H. Sakata
J. Phys. Soc. Jpn. 86, 113703 (2017)
arXiv:1710.02979

Full-gap superconductivity in spin-polarized surface states of topological semimetal &beta-PdBi2

K. Iwaya, Y. Kohsaka, K. Okawa, T. Machida, M. S. Bahramy, T. Hanaguri, T. Sasagawa
Nature communications 8, 976 (2017)
arXiv:1708.08204

Orbital-dependent quasiparticle scattering interference in 3R-NbS2

T. Machida, Y. Kohsaka, K. Iwaya, R. Arita, T. Hanaguri, R. Suzuki, M. Ochi, and Y. Iwasa
Phys. Rev. B 96, 075206 (2017)
arXiv:1708.01981v2

Spin-orbit scattering visualized in quasiparticle interference

Y. Kohsaka, T. Machida, K. Iwaya, M. Kanou, T. Hanaguri, and T. Sasagawa
Phys. Rev. B 95, 115307 (2017)
arXiv:1703.06234v1

2016

Scanning tunneling microscopy and spectroscopy study of the patchwork structure in Pt doped IrTe2

Y. Fujisawa, T. Machida, K. Igarashi, A. Kaneko, T. Mochiku, S. Ooi, M. Tachiki, K. Komori, K. Hirata, H. Sakata
Physica C 530, 35-37 (2016)

Change of the Surface Structure by F Doping in BiS2-Based Superconductor CeO1-xFxBiS2

S. Demura, T. Fujisawa, T. Machida, M. Nagao, Y. Takano, H. Sakata
Physics Procedia 81, 49-52 (2016)

Bipartite electronic superstructures in the vortex core of Bi2Sr2CaCu2O8+δ

T. Machida, Y. Kohsaka, K. Matsuoka, K. Iwaya, T. Hanaguri, T. Tamegai
Nature Commun. 7, 11747 (2016)
arXiv:1508.00621

2015

Two kinds of in-plane resistivity anisotropy in Fe1+δTe (δ=0.09) as seen via synchrotron radiation x-ray diffraction and in situ resistivity measurements

T. Nakajima, T. Machida, H. Kariya, D. Morohoshi, Y. Yamasaki, H. Nakao, K. Hirata, T. Mochiku, H. Takeya, S. Mitsuda, and H. Sakata
Phys. Rev. B 91, 205125 (2015)

Visualizing the Pt Doping Effect on Surface and Electronic Structure in Ir1-xPtxTe2 by Scanning Tunnneling Microscopy and Spectroscopy

Y. Fujisawa, T. Machida, K. Igarashi, A. Kaneko, T. Mochiku, S. Ooi, M. Tachiki, K. Komori, K. Hirata, and H. Sakata
J. Phys. Soc. Jpn. 84, 043706 (2015)
arXiv:1503.00898v1

2014

"Checkerboard Stripe" Electronic State on Cleaved Surface of NdO0.7F0.3BiS2 Probed by Scanning Tunneling Microscopy

T. Machida, Y. Fujisawa, M. Nagao, S. Demura, K. Deguchi, Y. Mizuguchi, Y. Takano, and H. Sakata
J. Phys. Soc. Jpn. 83, 113701 (2014)
arXiv:1403.6110

Scanning Tunnneling Spectroscopy Study of Impurity Resonance Energy in Bi2Sr2CaCu2O8+δ

H. Nakamura, T. Machida, T. Kato, M. Fujimoto, M. Iguchi, T. Yamasaki, A. Kaneko. S. Ooi, T. Mochiku, K. Hirata, T. Hasegawa, and H. Sakata
J. Phys. Soc. Jpn. 83, 024702 (2014)

Crysatl Structure of Pt-doped IrTe2 Superconductor

T. Mochiku, Y. Matsushita, A. Sato, Y. Fujisawa, K. Igarashi, T. Machida, H. Sakata, and K. Hirata
Physics Procedia 58, 90-93 (2014)

On the bad metallicity and phase diagrams of Fe1+δX (X =Te, Se, S, solid solutions): an electrical resistivity study

M. El Massalami, K. Deguchi, T. Machida, H. Takeya, and Y. Takano
J. Phys.: Conf. Ser. 568, 022012 (2014)
arXiv:1410.2676

2013

Visualizing the effect of structurel supermodulation on electronic structure of IrTe2 by scanning tunneling spectroscopy

T. Machida, Y. Fujisawa, K. Igarashi, A. Kaneko, S. Ooi, T. Mochiku, K. Komori, K. Hirata, and H. Sakata
Phys. Rev. B 88, 245125 (2013)
arXiv:1312.1009

Observation of an isosceles triangular electronic sturucture around the excess iron atom in Fe1+δTe

T. Machida, K. Kogure, T. Kato, H. Nakamura, H. Takeya, T Mochiku, S. Ooi, Y. Mizuguchi, Y. Takano, K. Hirata, and H. Sakata
Phys. Rev. B 87, 214508 (2013)
arXiv:1305.7206

Distribution of the Impurity Resonance Energy in Bi2Sr2CaCu2O8+δ Observed by Scanning Tunneling Spectroscopy

H. Nakamura, T. Machida, M. Iguchi, Y. Yamasaki, A. Kaneko, H. Kariya, D. Morohoshi, S. Ooi, T. Mochiku, K. Hirata, T. Hasegawa, and H. Sakata
J. Supercond. Nov. Magn. 26, 2633-2635 (2013)

Effect of excess Fe on magnetic properties and crystallographic phases in Fe1+δTe

T. Machida, D. Morohoshi, K. Takimoto, H. Nakamura, H. Takeya, T. Mochiku, S. Ooi, Y. Mizuguchi, Y. Takano, K. Hirata, H. Sakata
Physica C 484, 19-21 (2013)

2012

Unidirectional Electronic Structure in the Parent State of the Iron-Chalcogenide Superconductor Fe1+δTe

T. Machida, K. Kogure, T. Kato, H. Nakamura, H. Takeya, T. Mochiku, S. Ooi, Y. Mizuguchi, Y. Takano, K. Hirata, H. Sakata
J. Phys. Soc. Jpn. 81, 074714 (2012)
arXiv:1105.4754

Impurity Resonance States in Bi2Sr1.6La0.4CuO6+δ

H. Nakamura, T. Machida, T. Kato, M. Fujimoto, H. Funahashi, M. Iguchi, K. Kogure, T. Yamasaki, S. Ooi, T. Mochiku, S. Nakano, K. Hirata, T. Hasegawa, H. Sakata
J. Supercond. Nov. Magn. 25, 1263-1265 (2012)

One-dimensional electronic order in Fe1.07Te probed by scanning tunneling spectroscopy

T. Machida, K. Kogure, T. Kato, H. Nakamura, H. Takeya, T. Mochiku, S. Ooi, Y. Mizuguchi, Y. Takano, H. Sakata, K. Hirata
J. Supercond. Nov. Magn. 25, 1273-1276 (2012)

2011

Quantum interference of impurity bound states in Bi2Sr2Ca(Cu1-xZnx)2O8+δ proved by scanning tunneling spectroscopy

T. Machida, T. Kato, H.Nakamura, M. Fujimoto, T. Mochiku, S. Ooi, A. D. Thakur, H. Sakata, K. Hirata
Phys. Rev. B 84, 064501 (2011)
arXiv:1105.4914

Impurity-Related Local Density-of-States Modulation in Bi2Sr2Ca(Cu1-xZnx)2O8+δ Probed by Scanning Tunneling Spectroscopy

T. Machida, T. Kato, H. Nakamura, M. Fujimoto, T. Mochiku, S. Ooi, H. Sakata, K. Hirata
J. Supercond. Nov. Magn. 24, 481-484 (2011)

Effect of Zn, Ni, and Fe Impurities on Bi2Sr1.6La0.4CuO6+δ

H. Nakamura, H. Funahashi, M. Fujimoto, M. Iguchi, T. Yamasaki, T. Machida, T. Kato, H. Sakata
J. Supercond. Nov. Magn. 24, 271-273 (2011)

2010

Disappearance of zinc impurity resonance in large-gap region of Bi2Sr2CaCu2O8+δ probed by scanning tunneling spectroscopy

T. Machida, T. Kato, H. Nakamura, M. Fujimoto, T. Mochiku, S. Ooi, A. D. Thakur, H. Sakata, K. Hirata
Phys. Rev. B 82, 180507(R) (2010)
arXiv:1010.5839

Development of near-field microwave microscope with the functionality of scanning tunneling spectroscopy

T. Machida, M. B. Gaifullin, S. Ooi, T. Kato, H. Sakata, K. Hirata
Jpn. J. Appl. Phys. 49, 116701 (2010)

Microwave Responses on Locally Modified Bi2Sr2CaCu2O8+δ by Near-Field Microwave Microscope

T. Machida, S. Ooi, M. Tachiki, T. Mochiku, T. Kato, H. Sakata, K. Hirata
Physica C 470, S1021-S1022 (2010)

Quasiparticle Density of States in Cuprate Superconductor Bi2Sr2-xLaxCuO6+δ in a Magnetic Field Studied by Scanning Tunneling Spectroscopy

T. Kato, N. Nakamura, M. Fujimoto, H. Funahashi, T. Machida, H. Sakata, S. Nakao, T. Hasegawa
Physica C 470, S207-S208 (2010)

Scanning Tunneling Spectroscopy on Overdoped Bi2Sr2-xLaxCuO6+δ

T. Kato, H. Funahashi, H. Nakamura, M. Fujimoto, T. Machida, H. Sakata, S. Nakao, T. Hasegawa
J. Supercond. Nov. Magn. 23, 771-773 (2010)

2009

Local density-of-states and superconducting gap in iron chalcogenide superconductor Fe1+dSe1-xTex observed by scanning tunneling spectroscopy

T. Kato, Y. Mizuguchi, H. Nakamura, T. Machida, H. Sakata, Y. Takano
Phys. Rev. B 80, 180507(R) (2009)
arXiv:0910.1485

Local Measurement of Microwave Response with Tunneling Spectra Using Near-Field Microwave Microscope

T. Machida, M. B. Gaiffulin, S. Ooi, T. Kato, H. Sakata, K. Hirata
Appl. Phys. Exp. 2, 025006 (2009)
arXiv:1003.5714

Spatial Correlation between Gap Distribution and Impurity State in Bi2Sr2Ca(Cu1-xZnx)2O8+δ(x=0.02)

T. Machida, M. B. Gaiffulin, T. Mochiku, T. Kato, H. Sakata, K. Hirata
Journal of Physics: Conference series 150, 052145 (2009)

Spatial Correlation between the LDOS Modulation and Electronic Inhomogeneity in Bi2Sr2-xLaxCuO6+δ

T. Kato, T. Machida, Y. Kamijo, R. Miyashita, and H. Sakata
Journal of Physics: Conference series 150, 052101 (2009)

2008

Observation of the Local Density-of-States Modulation in Bi2Sr1.6Gd0.4CuO6+δby Scanning Tunneling Microscopy

R.Saito, N. Tsuji, T. Noguchi, T. Machida, T. Kato, H. Sakata
Physica C 468, 876-882 (2008)

2007

Doping Dependence of Superconducting Gap in Bi2Sr2-xLaxCuO6+δ(x=0.2,0.4,0.6)

T. Machida, Y. Kamijo, T. Kato, K. Harada, R. Saito, T. Noguchi, H. Sakata
International Journal of Modern Physics B 21, 3227-3229 (2007)

Spatial Evolution of The Back Ground Conductance in The Tunneling Spectra in Bi2Sr2-xLaxCuO6+δ

T. Kato, T. Machida, Y. Kamijo, K. Harada, R. Saito, T. Noguchi, H. Sakata
International Journal of Modern Physics B 21, 3190-3193 (2007)

Anomalous Energy Gap Evolution in Bi2Sr1.6La0.4CuO6+δ

T. Machida, Y. Kamijo, K. Harada, T. Kato, R. Saito, T. Noguchi, H. Sakata
Physica C 463-465, 146-148 (2007)

Measurement of c-axis Resistivity in Lanthanide Substituted Bi2Sr2CuO6+δ

K. Harada, T. Machida, Y. Kamijo, T. Kato, R. Saito, T. Noguchi, H. Sakata
Physica C 463-465, 187-189 (2007)

Observation of Fine Structure in Local Density-of-States in La2-x-yNdySrxCuO4

R. Saito, T. Noguchi, T. Machida, T. Kato, H. Sakata
Physica C 463-465, 131-133 (2007)

STM Observation of Local Density-of-States Modulation in Lanthanide Substituted Bi2Sr1.6Ln0.4CuO6+δ

T. Noguchi, R. Saito, T. Machida, T. Kato, H. Sakata
Physica C 463-465, 138-140 (2007)

Modulation of the local density of states in Bi2Sr1.6La0.4CuO6+δ observed by scanning tunneling spectroscopy

T. Machida, Y. Kamijo, N. Tsuji, K. Harada, T. Kato, R. Saito, H. Sakata
Physica C 460-462, 866-867 (2007)

Gap distribution in overdoped La2-xSrxCuO4 observed by scanning tunneling spectroscopy

T. Kato, T. Noguchi, R. Saito, T. Machida, H. Sakata
Physica C 460-462, 880-881 (2007)

Pseudogap state in La1.48Nd0.4Sr0.12CuO4 and Bi2Sr1.6Gd0.4CuO6+δ studied by scanning tunneling spectroscopy

R. Saito, N. Tsuji, T. Kato, T. Machida, T. Noguchi, H. Sakata
Physica C 460-462, 878-879 (2007)

Tunneling spectroscopic measurement in lanthanide substituted Bi2Sr2CuO6+δ

Y. Kamijo, T. Machida, N. Tsuji, K. Harada, R. Saito, T. Kato, H. Sakataa
Physica C 460-462, 870-871 (2007)

2006

Appearance of new energy gap and periodic local density-of-states modulation in Bi2Sr1.6La0.4CuO6+δ

T. Machida, Y. Kamijo, K. Harada, T. Noguchi, R. Saito, T. Kato, H. Sakata
J. Phys. Soc. Jpn. 75, 083708 (2006)
arXiv:06.07099v3

Local enhancement of zero bias conductance in Bi2Sr1.6Nd0.4CuOy

T. Machida, N. Tsuji, Y. Kamijo, K. Harada, T. Kato, R. Saito, H. Sakata
AIP Conference Proceedings 850, 515 (2006)

2005

Scanning Tunneling Microscopy and Spectroscopy in Lanthanide Substituted Bi2Sr2CuOy

T. Machida, N.Tsuji, H.Sakata
Physica C 426-431, 407-410 (2005)