On the remarkable superconductivity of FeSe and its close cousins

A Kreisel, PJ Hirschfeld, BM Andersen - Symmetry, 2020 - mdpi.com
Emergent electronic phenomena in iron-based superconductors have been at the forefront
of condensed matter physics for more than a decade. Much has been learned about the …

Interplay between magnetism and superconductivity in iron-chalcogenide superconductors: crystal growth and characterizations

J Wen, G Xu, G Gu, JM Tranquada… - Reports on progress in …, 2011 - iopscience.iop.org
In this review, we present a summary of results on single crystal growth of two types of iron-
chalcogenide superconductors, Fe 1+ y Te 1− x Se x (11), and A x Fe 2− y Se 2 (A= K, Rb …

Observation of a robust zero-energy bound state in iron-based superconductor Fe (Te, Se)

JX Yin, Z Wu, JH Wang, ZY Ye, J Gong, XY Hou… - Nature Physics, 2015 - nature.com
In superconductors, electrons are paired and condensed into the ground state. An impurity
can break the electron pairs into quasiparticles with energy states inside the …

Dynamics and mechanism of oxygen annealing in Fe1+yTe0.6Se0.4 single crystal

Y Sun, Y Tsuchiya, T Taen, T Yamada, S Pyon… - Scientific Reports, 2014 - nature.com
Abstract Iron chalcogenide Fe (Te, Se) attracted much attention due to its simple structure,
which is favorable for probing the superconducting mechanism. Its less toxic nature …

Low-temperature phase diagram of FeTe studied using x-ray diffraction

C Koz, S Rößler, AA Tsirlin, S Wirth, U Schwarz - Physical Review B …, 2013 - APS
We used low-temperature synchrotron x-ray diffraction to investigate the structural phase
transitions of Fe 1+ y Te in the vicinity of a tricitical point in the phase diagram. A detailed …

Pinning energy and anisotropy properties of a Fe (Se, Te) iron based superconductor

A Galluzzi, K Buchkov, E Nazarova, V Tomov… - …, 2019 - iopscience.iop.org
The measurements of DC magnetization M as a function of magnetic field (H) and time (t)
have been performed in order to study the superconducting and pinning properties of a Fe …

Large, homogeneous, and isotropic critical current density in oxygen-annealed Fe1+ yTe0. 6Se0. 4 single crystal

Y Sun, T Taen, Y Tsuchiya, Q Ding, S Pyon… - Applied Physics …, 2013 - iopscience.iop.org
We reported a controllable way of removing excess Fe in Fe 1+ y Te 0.6 Se 0.4 by annealing
in a fixed amount of O 2. Compared with the weak superconductivity induced by dilute acids …

First-order structural transition in the magnetically ordered phase of FeTe

S Rößler, D Cherian, W Lorenz, M Doerr, C Koz… - Physical Review B …, 2011 - APS
Specific heat, resistivity, magnetic susceptibility, linear thermal expansion (LTE), and high-
resolution synchrotron x-ray powder diffraction investigations of single crystals Fe 1+ y Te …

Study of TAFF and vortex phase of FexTe0. 60Se0. 40 (0.970≤ x≤ 1.030) single crystals

R Kumar, GD Varma - Physica Scripta, 2020 - iopscience.iop.org
Single crystalline samples with starting compositions Fe x Te 0.60 Se 0.40 (x= 0.970, 0.985,
1, 1.015 and 1.030) have been grown using the self-flux method to study the effect of Fe …

Mixed state properties of iron based Fe (Se, Te) superconductor fabricated by Bridgman and by self-flux methods

A Galluzzi, K Buchkov, V Tomov, E Nazarova… - Journal of Applied …, 2018 - pubs.aip.org
The superconducting and transport properties of iron based Fe (Se, Te) superconductors
fabricated by means of Bridgman (B) and Self-flux (S) methods have been compared using …