School of Physics and Astronomy

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Dr Satoshi Sasaki

Condensed Matter Group

Contact details

Room: 8.305
Tel: +44 (0)113 3433578
Email: S.Sasaki @ leeds.ac.uk

Keywords

Spintronics
Topological insulator
Topological Superconductor
Dirac fermion
Majorana fermion
Condensed matter physics

Research interests

Topological Insulators: Realization of quantum spin Hall state; Creation, control, and detection of the spin-momentum locked surface state for spintronics with devices fabricated by lithography.

Topological Superconductors and Andreev bound states consisting of Majorana Fermions: Search for candidate materials with soft point-contact spectroscopy technique; Tunneling spectroscopy with tunnel junction devices, Josephson junction devices and SQUID fabricated by lithography; Specific heat measurements and magnetization measurements.

Helium at ultralow temperatures: Superfluid and quantum solid helium 3 with an adiabatic-demagnetization dilution fridge; Supersolidity of quantum solid helium 4 with an optical dilution fridge; NMR measurements and ultrasound measurements at ultralow temperatures.

Useful links

My personal page
Google scholar

Publications

Atherton S, Steele B, Sasaki S Unexpected Au alloying in tailoring in-doped SnTe nanostructures with gold nanoparticles Crystals 7 -, 2017
DOI:10.3390/cryst7030078
View abstract

Nakayama K, Kimizuka H, Tanaka Y, Sato T, Souma S, Takahashi T, Sasaki S, Segawa K, Ando Y Observation of two-dimensional bulk electronic states in the superconducting topological insulator heterostructure Cuₓ(PbSe)₅(Bi₂Se₃)₆: Implications for unconventional superconductivity Physical Review B 92 -, 2015
DOI:10.1103/PhysRevB.92.100508
View abstract

Wang Z, Segawa K, Sasaki S, Taskin AA, Ando Y Ferromagnetism in Cr-doped topological insulator TlSbTe2 APL Materials 3 -, 2015
DOI:10.1063/1.4922002
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Sasaki S, Mizushima T Superconducting doped topological materials Physica C: Superconductivity and its Applications 514 206-217, 2015
DOI:10.1016/j.physc.2015.02.018
View abstract

Sasaki S, Ando Y Superconducting Sn1-xInxTe Nanoplates Crystal Growth and Design 15 2748-2752, 2015
DOI:10.1021/acs.cgd.5b00058
View abstract

Yang F, Taskin AA, Sasaki S, Segawa K, Ohno Y, Matsumoto K, Ando Y Dual-gated topological insulator thin-film device for efficient fermi-level tuning ACS Nano 9 4050-4055, 2015
DOI:10.1021/acsnano.5b00102
View abstract

Novak M, Sasaki S, Segawa K, Ando Y Large linear magnetoresistance in the Dirac semimetal TlBiSSe Physical Review B - Condensed Matter and Materials Physics 91 -, 2015
DOI:10.1103/PhysRevB.91.041203
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Sasaki S, Segawa K, Ando Y Superconductor derived from a topological insulator heterostructure Physical Review B - Condensed Matter and Materials Physics 90 -, 2014
DOI:10.1103/PhysRevB.90.220504
View abstract

Electrical detection of the spin polarization due to charge flow in the surface state of the topological insulator Bi1.5Sb0.5Te1.7Se1.3 Nano Letters 14 6226-6230, 2014
DOI:10.1021/nl502546c
View abstract

Ando Y, Hamasaki T, Kurokawa T, Ichiba K, Yang F, Novak M, Sasaki S, Segawa K, Ando Y, Shiraishi M Electrical Detection of the Spin Polarization Due to Charge Flow in the Surface State of the Topological Insulator Bi1.5Sb0.5Te1.7Se1.3 NANO LETTERS 14 6226-6230, 2014
DOI:10.1021/n1502546c

Sandilands LJ, Reijnders AA, Kriener M, Segawa K, Sasaki S, Ando Y, Burch KS Doping-dependent charge dynamics in Cux Bi2 Se3 Physical Review B - Condensed Matter and Materials Physics 90 -, 2014
DOI:10.1103/PhysRevB.90.094503
View abstract

Yang F, Taskin AA, Sasaki S, Segawa K, Ohno Y, Matsumoto K, Ando Y Top gating of epitaxial (Bi1-xSbx)2Te3topological insulator thin films Applied Physics Letters 104 -, 2014
DOI:10.1063/1.4873397
View abstract

Taskin AA, Yang F, Sasaki S, Segawa K, Ando Y Topological surface transport in epitaxial SnTe thin films grown on Bi 2 Te 3 Physical Review B - Condensed Matter and Materials Physics 89 -, 2014
DOI:10.1103/PhysRevB.89.121302
View abstract

Novak M, Sasaki S, Kriener M, Segawa K, Ando Y Unusual nature of fully gapped superconductivity in In-doped SnTe Physical Review B - Condensed Matter and Materials Physics 88 -, 2013
DOI:10.1103/PhysRevB.88.140502
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Ando Y, Segawa K, Sasaki S, Kriener M Experimental studies of the topological superconductor CuxBi2Se3, 2013
DOI:10.1088/1742-6596/449/1/012033
View abstract

Kondo T, Nakashima Y, Ota Y, Ishida Y, Malaeb W, Okazaki K, Shin S, Kriener M, Sasaki S, Segawa K, Ando Y Anomalous dressing of dirac fermions in the topological surface state of Bi2Se3, Bi2Te3, and cu-doped Bi2Se3 Physical Review Letters 110 -, 2013
DOI:10.1103/PhysRevLett.110.217601
View abstract

Sato T, Tanaka Y, Nakayama K, Souma S, Takahashi T, Sasaki S, Ren Z, Taskin AA, Segawa K, Ando Y Fermiology of the strongly spin-orbit coupled superconductor Sn1-xInxTe: Implications for topological superconductivity Physical Review Letters 110 -, 2013
DOI:10.1103/PhysRevLett.110.206804
View abstract

Ren Z, Kriener M, Taskin AA, Sasaki S, Segawa K, Ando Y Anomalous metallic state above the upper critical field of the conventional three-dimensional superconductor AgSnSe2with strong intrinsic disorder Physical Review B - Condensed Matter and Materials Physics 87 -, 2013
DOI:10.1103/PhysRevB.87.064512
View abstract

Sasaki S, Ren Z, Taskin AA, Segawa K, Fu L, Ando Y Odd-parity pairing and topological superconductivity in a strongly spin-orbit coupled semiconductor Physical Review Letters 109 -, 2012
DOI:10.1103/PhysRevLett.109.217004
View abstract

Kriener M, Segawa K, Sasaki S, Ando Y Anomalous suppression of the superfluid density in the CuxBi2Se3superconductor upon progressive Cu intercalation Physical Review B - Condensed Matter and Materials Physics 86 -, 2012
DOI:10.1103/PhysRevB.86.180505
View abstract

Taskin AA, Sasaki S, Segawa K, Ando Y Achieving surface quantum oscillations in topological insulator thin films of Bi2Se3 Advanced Materials 24 5581-5585, 2012
DOI:10.1002/adma.201201827
View abstract

Segawa K, Ren Z, Sasaki S, Tsuda T, Kuwabata S, Ando Y Ambipolar transport in bulk crystals of a topological insulator by gating with ionic liquid Physical Review B - Condensed Matter and Materials Physics 86 -, 2012
DOI:10.1103/PhysRevB.86.075306
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Taskin AA, Sasaki S, Segawa K, Ando Y Manifestation of topological protection in transport properties of epitaxial Bi2Se3thin films Physical Review Letters 109 -, 2012
DOI:10.1103/PhysRevLett.109.066803
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Ren Z, Taskin AA, Sasaki S, Segawa K, Ando Y Fermi level tuning and a large activation gap achieved in the topological insulator Bi2Te2Se by Sn doping Physical Review B - Condensed Matter and Materials Physics 85 -, 2012
DOI:10.1103/PhysRevB.85.155301
View abstract

Sasaki S, Kriener M, Segawa K, Yada K, Tanaka Y, Sato M, Ando Y Topological superconductivity in CuxBi2Se3 Physical Review Letters 107 -, 2011
DOI:10.1103/PhysRevLett.107.217001
View abstract

Ren Z, Taskin AA, Sasaki S, Segawa K, Ando Y Optimizing Bi2-xSbxTe3-ySeysolid solutions to approach the intrinsic topological insulator regime Physical Review B - Condensed Matter and Materials Physics 84 -, 2011
DOI:10.1103/PhysRevB.84.165311
View abstract

Ren Z, Taskin AA, Sasaki S, Segawa K, Ando Y Observations of two-dimensional quantum oscillations and ambipolar transport in the topological insulator Bi2Se3achieved by Cd doping Physical Review B - Condensed Matter and Materials Physics 84 -, 2011
DOI:10.1103/PhysRevB.84.075316
View abstract

Kriener M, Segawa K, Ren Z, Sasaki S, Wada S, Kuwabata S, Ando Y Electrochemical synthesis and superconducting phase diagram of CuxBi2Se3 Physical Review B - Condensed Matter and Materials Physics 84 -, 2011
DOI:10.1103/PhysRevB.84.054513
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Taskin AA, Ren Z, Sasaki S, Segawa K, Ando Y Observation of dirac holes and electrons in a topological insulator Physical Review Letters 107 -, 2011
DOI:10.1103/PhysRevLett.107.016801
View abstract

Kriener M, Segawa K, Ren Z, Sasaki S, Ando Y Bulk superconducting phase with a full energy gap in the doped topological insulator CuxBi2Se3 Physical Review Letters 106 -, 2011
DOI:10.1103/PhysRevLett.106.127004
View abstract

Ren Z, Taskin AA, Sasaki S, Segawa K, Ando Y Large bulk resistivity and surface quantum oscillations in the topological insulator Bi2Te2Se Physical Review B - Condensed Matter and Materials Physics 82 -, 2010
DOI:10.1103/PhysRevB.82.241306
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Caupin F, Sasaki S, Balibar S Absence of grain boundary melting in solid helium Journal of Physics Condensed Matter 20 -, 2008
DOI:10.1088/0953-8984/20/49/494228
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Sasaki S, Caupin F, Balibar S Erratum: Optical observations of disorder in solid helium 4 (Journal of Low Temperature Physics (2008) vol. 153(3/4) 10.1007/s10909-008-9824-4) Journal of Low Temperature Physics 153 43-76, 2008
DOI:10.1007/s10909-008-9848-9
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Sasaki S, Caupin F, Balibar S Optical Observations of Disorder in Solid Helium 4 Journal of Low Temperature Physics 1-33, 2008
DOI:10.1007/s10909-008-9824-4
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Sasaki S, Nakayama A, Sasaki Y, Mizusaki T Sound velocity measurements in the low and the high field phases of the nuclear-ordered bcc solid 3He in magnetic fields Journal of Low Temperature Physics 151 1113-1148, 2008
DOI:10.1007/s10909-008-9799-1
View abstract

Caupin F, Sasaki S, Balibar S Supersolidity and disorder in solid helium 4, 2008
DOI:10.1007/s10909-007-9545-0
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Kii T, Ohgaki H, Masuda K, Sasaki S, Shiiyama T, Zen H Beam properties from s-band energy compensated thermionic RF gun and linac for KU-FEL, 2007
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Sasaki S, Caupin F, Balibar S Wetting properties of grain boundaries in solid He4 Physical Review Letters 99 -, 2007
DOI:10.1103/PhysRevLett.99.205302
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Sasaki S, Ishiguro R, Caupin F, Maris HJ, Balibar S Supersolidity and superfluidity of grain boundaries Journal of Low Temperature Physics 148 665-670, 2007
DOI:10.1007/s10909-007-9445-3
View abstract

Sasaki S, Nakayama A, Sasaki Y, Mizusaki T Sound velocity measurements of nuclear-spin ordered BCC solid 3He Journal of Magnetism and Magnetic Materials 310 1587-1589, 2007
DOI:10.1016/j.jmmm.2006.10.603
View abstract

Sasaki S, Takagi D, Nakayama A, Sasaki Y, Mizusaki T Sound velocity measurements of nuclear-ordered solid 3He in the low field phase, 2006
DOI:10.1063/1.2354709
View abstract

Sasaki S, Ishiguro R, Caupin F, Maris HJ, Balibar S Superfluidity of grain boundaries and supersolid behavior Science 313 1098-1100, 2006
DOI:10.1126/science.1130879
View abstract

Sasaki S, Takagi D, Sasaki Y, Mizusaki T The sound velocity measurements of nuclear-ordered bcc solid 3He under magnetic fields, 2005
DOI:10.1016/j.jpcs.2005.05.034
View abstract

Yamaguchi M, Sasaki S, Lee SG, Sasaki Y, Mizusaki T Elastic Stiffness of the Nuclear-Spin System in Tetragonal U2D2 Nuclear-Ordered Solid3He Physical Review Letters 91 1153011-1153014, 2003
View abstract

Yamaguchi M, Sasaki S, Lee SG, Sasaki Y, Mizusaki T Sound velocity and attenuation in nuclear-ordered U2D2 solid3He, 2003
DOI:10.1016/S0921-4526(02)02122-1
View abstract