Calorimetric study in single crystal of CsFe$_2$As$_2$

A. F. Wang; B. Y. Pan; X. G. Luo; F. Chen; Y. J. Yan; J. J. Ying; G.; J. Ye; P. Cheng; X. C. Hong; S. Y. Li; X. H. Chen

arXiv:1302.5612·cond-mat.supr-con·June 17, 2013

Calorimetric study in single crystal of CsFe$_2$As$_2$

A. F. Wang, B. Y. Pan, X. G. Luo, F. Chen, Y. J. Yan, J. J. Ying, G., J. Ye, P. Cheng, X. C. Hong, S. Y. Li, X. H. Chen

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TL;DR

This study investigates the superconducting properties of high-quality CsFe$_2$As$_2$ single crystals through resistivity and specific heat measurements, revealing unconventional pairing symmetry and high crystal quality.

Contribution

First detailed calorimetric analysis of CsFe$_2$As$_2$ single crystals demonstrating high-quality growth and unconventional superconducting pairing.

Findings

01

Superconducting transition at 1.8 K with a sharp transition width

02

Pronounced specific heat jump indicating high crystal quality

03

Evidence supporting unconventional pairing symmetry

Abstract

We measured resistivity and specific heat of high-quality CsFe $_{2}$ As $_{2}$ single crystals, which were grown by using a self-flux method. The CsFe $_{2}$ As $_{2}$ crystal shows sharp superconducting transition at 1.8 K with the transition width of 0.1 K. The sharp superconducting transition and pronounced jump in specific heat indicate high quality of the crystals. Analysis on the superconducting-state specific heat supports unconventional pairing symmetry in CsFe $_{2}$ As $_{2}$ .

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