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Title: Superconductivity emerging from a stripe charge order in IrTe2 nanoflakes
Authors: Park, S.
Kim, S. Y.
Kim, H. K.
Kim, M. J.
Kim, T.
Kim, H.
Choi, G. S.
Won, C. J.
Kim, S.
Kim, K.
Talantsev, E. F.
Watanabe, K.
Taniguchi, T.
Cheong, S. -W.
Kim, B. J.
Yeom, H. W.
Kim, J.
Kim, T. -H.
Kim, J. S.
Issue Date: 2021
Publisher: Nature Research
Citation: Superconductivity emerging from a stripe charge order in IrTe2 nanoflakes / S. Park, S. Y. Kim, H. K. Kim, et al. — DOI 10.1038/s41467-021-23310-w // Nature Communications. — 2021. — Vol. 12. — Iss. 1. — 3157.
Abstract: Superconductivity in the vicinity of a competing electronic order often manifests itself with a superconducting dome, centered at a presumed quantum critical point in the phase diagram. This common feature, found in many unconventional superconductors, has supported a prevalent scenario in which fluctuations or partial melting of a parent order are essential for inducing or enhancing superconductivity. Here we present a contrary example, found in IrTe2 nanoflakes of which the superconducting dome is identified well inside the parent stripe charge ordering phase in the thickness-dependent phase diagram. The coexisting stripe charge order in IrTe2 nanoflakes significantly increases the out-of-plane coherence length and the coupling strength of superconductivity, in contrast to the doped bulk IrTe2. These findings clarify that the inherent instabilities of the parent stripe phase are sufficient to induce superconductivity in IrTe2 without its complete or partial melting. Our study highlights the thickness control as an effective means to unveil intrinsic phase diagrams of correlated van der Waals materials. © 2021, The Author(s).
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85106954591
PURE ID: 22095970
ISSN: 20411723
DOI: 10.1038/s41467-021-23310-w
metadata.dc.description.sponsorship: The authors thank K.T. Ko, G.Y. Jo, Y.K. Bang for fruitful discussion. We also thank H. G. Kim in Pohang Accelerator Laboratory (PAL) for the technical support. This work was supported by the Institute for Basic Science (IBS) through the Center for Artificial Low Dimensional Electronic Systems (no. IBS-R014-D1), the National Research Foundation of Korea (NRF) through SRC (Grant No. NRF-2018R1A5A6075964), and the Max Planck-POSTECH Center for Complex Phase Materials (Grant No. NRF-2016K1A4A4A01922028). J.K., M.J.K. acknowledge the support from the NRF of Korea grant (Grant No. NRF-2017R1C1B2012729 and NRF-2020R1A4A1018935). K.W. and T.T. acknowledge support from the Elemental Strategy Initiative conducted by the MEXT, Japan, Grant Number JPMXP0112101001, JSPS KAKENHI Grant Numbers JP20H00354 and the CREST (JPMJCR15F3), JST. E. F. T. thanks financial support provided by the state assignment of Minobrnauki of Russia (theme Pressure No. AAAA-A18-118020190104-3) and by Act 211 Government of the Russian Federation, contract no. 02.A03.21.0006. S.K. acknowledges the support from the NRF of Korea grant (Grant No. NRF-2019R1F1A1052026) and KISTI supercomputing center (Grant No. KSC-2019-CRE-0172). K.K. acknowledges the support from the NRF of Korea grant (Grant No. 2016R1D1A1B02008461) and Internal R&D programme at KAERI (Grant No. 5244460-21). SWC was partially supported by the NSF under Grant No. DMR-1629059.
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