@article{e5a337c166914aafb4430aea129d5902,
title = "Evidence for a delocalization quantum phase transition without symmetry breaking in CeCoIn5",
abstract = "The study of quantum phase transitions that are not clearly associated with broken symmetry is a major effort in condensed matter physics, particularly in regard to the problem of high-temperature superconductivity, for which such transitions are thought to underlie the mechanism of superconductivity itself. Here we argue that the putative quantum critical point in the prototypical unconventional superconductor CeCoIn5 is characterized by the delocalization of electrons in a transition that connects two Fermi surfaces of different volumes, with no apparent broken symmetry. Drawing on established theory of f-electron metals, we discuss an interpretation for such a transition that involves the fractionalization of spin and charge, a model that effectively describes the anomalous transport behavior we measured for the Hall effect.",
author = "Nikola Maksimovic and Eilbott, {Daniel H.} and Tessa Cookmeyer and Fanghui Wan and Jan Rusz and Vikram Nagarajan and Haley, {Shannon C.} and Eran Maniv and Amanda Gong and Stefano Faubel and Hayes, {Ian M.} and Ali Bangura and John Singleton and Palmstrom, {Johanna C.} and Laurel Winter and Ross McDonald and Sooyoung Jang and Ping Ai and Yi Lin and Samuel Ciocys and Jacob Gobbo and Yochai Werman and Oppeneer, {Peter M.} and Ehud Altman and Alessandra Lanzara and Analytis, {James G.}",
note = "Funding Information: We thank C. Varma, S. Sachdev, S. Chatterjee, M. Vojta, and J. D. Denlinger for helpful discussions and E. Green for support during experiments at the millikelvin facility at the National High Magnetic Field Laboratory. Hall bar devices were fabricated at the Focused Ion Beam at the National Center for Electron Microscopy Sciences at Lawrence Berkeley National Laboratory. This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division under contract DE-AC02-05-CH11231 within the Quantum Materials program (KC2202). V.N., T.C., and D.H.E. are supported by National Science Foundation Graduate Research Fellowship grant DGE-1752814. This work was partially supported by the Gordon and Betty Moore Foundations EPiQS Initiative through grant GBMF9067. P.M.O. and J.R. are supported by the Swedish Research Council (VR) and K. and A. Wallenberg Foundation award 2015.0060. DFT calculations were performed using resources of Swedish National Infrastructure for Computing (SNIC) at the NSC center (cluster Tetralith). Pulsed-field and dilution fridge experiments were conducted at the National High Magnetic Field Laboratory facilities in Tallahassee, Florida, and Los Alamos, New Mexico, respectively, which are supported by National Science Foundation Cooperative Agreement DMR-1644779 and the state of Florida. Publisher Copyright: {\textcopyright} 2022 American Association for the Advancement of Science. All rights reserved.",
year = "2022",
month = jan,
day = "7",
doi = "10.1126/science.aaz4566",
language = "English",
volume = "375",
pages = "76--81",
journal = "Science",
issn = "0036-8075",
publisher = "American Association for the Advancement of Science",
number = "6576",
}