High-pressure studies of Charge-Density-Wave Superconductors
Lead Research Organisation:
University of Bristol
Department Name: Physics
Abstract
Superconductivity and Charge-Density-Wave order are intriguing states of matter. In particular superconductivity has an enormous technological potential. The lossless transmission of electrical power in superconductors can be used to make huge energy savings. Indeed, first prototypes of superconducting power lines are being established in the USA and Korea. Superconductors also facilitate high stable magnetic fields used for magnetic resonance scanning in healthcare and are one of the most promising routes towards quantum computing.
Currently the potential of superconductivity for applications is held back by limitations to the understanding of the microscopic origin. Further understanding of superconductivity and related phenomena is likely to allow much wider applications. This grant will study the interplay of Superconductivity and charge-density-wave order.
Traditionally, the superconductivity and charge-density-wave order are thought to be in competition with superconductivity often weakened by the presence of charge-density-wave order. Yet, the recent discovery of charge-density-wave order in high-temperature copper-oxide superconductors raises the possibility of superconductivity being driven by charge-density-wave order. Unfortunately, copper-oxide superconductors are very complex materials where it is difficult to disentangle the effects of the charge-density-wave order from other phenomena. This is why we will study less complicated model systems.
We explore the limits of various theoretical scenarios in selected model materials and relate those results to the high-temperature copper-oxide superconductors. We study materials that show a promotion of superconductivity, as well as coexisting and competing superconductivity. We measure the key determinants for the superconductivity and the charge-density-wave order. For the first time we will measure the evolution of the Fermi surface and electron-phonon coupling using high-pressure quantum oscillation studies. Our novel approach will shed light on the mechanism of both the charge-density-wave order and superconductivity in these materials and will guide theory on both superconductivity and charge-density-wave order and intriguing material properties caused by these.
Currently the potential of superconductivity for applications is held back by limitations to the understanding of the microscopic origin. Further understanding of superconductivity and related phenomena is likely to allow much wider applications. This grant will study the interplay of Superconductivity and charge-density-wave order.
Traditionally, the superconductivity and charge-density-wave order are thought to be in competition with superconductivity often weakened by the presence of charge-density-wave order. Yet, the recent discovery of charge-density-wave order in high-temperature copper-oxide superconductors raises the possibility of superconductivity being driven by charge-density-wave order. Unfortunately, copper-oxide superconductors are very complex materials where it is difficult to disentangle the effects of the charge-density-wave order from other phenomena. This is why we will study less complicated model systems.
We explore the limits of various theoretical scenarios in selected model materials and relate those results to the high-temperature copper-oxide superconductors. We study materials that show a promotion of superconductivity, as well as coexisting and competing superconductivity. We measure the key determinants for the superconductivity and the charge-density-wave order. For the first time we will measure the evolution of the Fermi surface and electron-phonon coupling using high-pressure quantum oscillation studies. Our novel approach will shed light on the mechanism of both the charge-density-wave order and superconductivity in these materials and will guide theory on both superconductivity and charge-density-wave order and intriguing material properties caused by these.
Planned Impact
The project will investigate charge-density-wave superconductors. This research will be of relevance to both the understanding and future application of superconductors and electronic materials.
Superconductors are used in wide-ranging applications. Most importantly for magnetic resonance imaging in health care and increasingly in power transmission. Improving the properties of superconductors can lead to much wider applications. Global research aims to improve the two key parameters, the transition temperature and the amount of current superconductors can carry. If these efforts are successful and can be combined with favourable mechanical properties of superconducting materials further applications and new devices will result. This could for instance be a grid of superconductors for lossless power distribution, levitating trains for energy efficient transport like the Shanghai Maglev Train in China.
Our research will contribute to the crucial step of understanding the fundamental mechanisms of superconductivity in high-temperature superconductors. It will contribute to clarifying the interplay of charge-density-wave order and superconductivity and contribute to identifying to what extend these two phenomena are antagonistic or supportive. We will use electronic structure measurements to reveal the interplay of superconductivity and charge-density-wave order in model materials with less complexity then cuprate high-temperature superconductivity. These results will guide researchers in identifying the nature of this interplay in cuprate superconductors. This will contribute towards enhancing the transition temperature and boost the potential for applications.
Superconductors are used in wide-ranging applications. Most importantly for magnetic resonance imaging in health care and increasingly in power transmission. Improving the properties of superconductors can lead to much wider applications. Global research aims to improve the two key parameters, the transition temperature and the amount of current superconductors can carry. If these efforts are successful and can be combined with favourable mechanical properties of superconducting materials further applications and new devices will result. This could for instance be a grid of superconductors for lossless power distribution, levitating trains for energy efficient transport like the Shanghai Maglev Train in China.
Our research will contribute to the crucial step of understanding the fundamental mechanisms of superconductivity in high-temperature superconductors. It will contribute to clarifying the interplay of charge-density-wave order and superconductivity and contribute to identifying to what extend these two phenomena are antagonistic or supportive. We will use electronic structure measurements to reveal the interplay of superconductivity and charge-density-wave order in model materials with less complexity then cuprate high-temperature superconductivity. These results will guide researchers in identifying the nature of this interplay in cuprate superconductors. This will contribute towards enhancing the transition temperature and boost the potential for applications.
People |
ORCID iD |
Sven Friedemann (Principal Investigator) |
Publications
Chen X
(2016)
Experimental determination of the Fermi surface of Sr 3 Ir 4 Sn 13
in Physical Review B
Putzke C
(2018)
Charge Order and Superconductivity in Underdoped YBa_{2}Cu_{3}O_{7-d} under Pressure.
in Physical review letters
Hedayat H
(2019)
Excitonic and lattice contributions to the charge density wave in 1 T - TiS e 2 revealed by a phonon bottleneck
in Physical Review Research
Reiss P
(2020)
Strong in-plane anisotropy in the electronic structure of fixed-valence ß - LuAlB 4
in Physical Review B
Knowles P
(2020)
Fermi Surface Reconstruction and Electron Dynamics at the Charge-Density-Wave Transition in TiSe_{2}.
in Physical review letters
Moulding O
(2020)
Absence of superconducting dome at the charge-density-wave quantum phase transition in 2 H - NbSe 2
in Physical Review Research
Ayres J
(2021)
Incoherent transport across the strange-metal regime of overdoped cuprates.
in Nature
Gamza M
(2021)
Pressure-induced reconstructive phase transition in Cd 3 As 2
in Physical Review Materials
Reiss P
(2022)
Ab initio electronic structure of metallized NiS 2 in the noncollinear magnetic phase
in Physical Review B
Ayres J
(2022)
Transport evidence for decoupled nematic and magnetic criticality in iron chalcogenides
in Communications Physics
Description | This research project studies the interaction of superconductivity and charge-density wave order. Whilst these two phenomena are generally expected to be in competition with each other, we found evidence that they are independent of each other in cuprate high-temperature superconductors. We used high-pressure to show that the enhancement of the superconductivity is accompanied only by a very weak suppression of the charge-density wave order. Thus, our results will help to understand the physics of cuprate high-temperature superconductors. |
Exploitation Route | High-temperature superconductors have a huge potential for applications. At the moment they are used in power transmission, and tested for magnetic imaging in medicine. Further applications are hindered by the need to cool and difficult mechanical materials properties. This research is contributing to the understanding of superconductivity and thus expected to help find new superconductors with improved characteristics. This impact is mainly achieved through publications in scientific journals and presentations at conferences which are received well in the academic community. |
Sectors | Electronics Energy Healthcare Manufacturing including Industrial Biotechology Other |
Title | Pressure Cell for Measurements at High-Magnetic-Field Facilities |
Description | Both Pressure and high magnetic fields are important probes for research in solid state physics. High Magnetic fields can be used to study the characteristics of superconductors and the electronic structure of metals. High pressures allow to tune materials properties without introducing disorder or symmetry breaking. Combining the two opens new avenues to address immanent questions on superconductivity, correlated metals, topological materials, and many more. As part of this research programme, we have developed and successfully used anvil type high-pressure cells that fit into the small samples space for low-temperature measurements in the magnets at the High Field Magnet Laboratory in Nijmegen, Netherlands. |
Type Of Material | Improvements to research infrastructure |
Year Produced | 2017 |
Provided To Others? | No |
Impact | Publications as listed for this grant. Further publications will follow soon. |
Title | Data accompanying Publication on TiSe2 magnetotransport study |
Description | Raw data for magnetotransport and quantum oscillation measurements to be made publically available. This data is underlying the forthcoming publication on TiSe2. |
Type Of Material | Database/Collection of data |
Year Produced | 2019 |
Provided To Others? | Yes |
URL | https://data.bris.ac.uk/data/dataset/1ga60qdfpvsil2ogxvaq14d6ht/ |
Title | Data for publication "Absence of superconducting dome at the charge-density-wave 1 quantum phase transition in 2H-NbSe2" |
Description | This data accompagnies the publication "Absence of superconducting dome at the charge-density-wave quantum phase transition in 2H-NbSe 2 " accepted in Physical Review Research. |
Type Of Material | Database/Collection of data |
Year Produced | 2020 |
Provided To Others? | Yes |
Impact | research data openly available to public |
URL | https://data.bris.ac.uk/data/dataset/3i7a3mzyfbrrp2j871ykh846v0/ |
Title | Data for publication "Pressure-induced reconstructive phase transition in Cd3As2" |
Description | All data relevant for publication "Pressure-induced reconstructive phase transition in Cd 3 As 2" accepted in Physical Review Materials 2021 |
Type Of Material | Database/Collection of data |
Year Produced | 2021 |
Provided To Others? | Yes |
Impact | research data openly available to public |
URL | https://data.bris.ac.uk/data/dataset/1boq1ta44ocxf2sdv5w11hagg2/ |
Title | Dataset for publication Raman Spectroscopy Sulphur |
Description | Dataset for publication titled: "Mutual stabilisation of charge-density-wave and monoclinic distortion in sulfur at high pressures" |
Type Of Material | Database/Collection of data |
Year Produced | 2023 |
Provided To Others? | Yes |
URL | https://data.bris.ac.uk/data/dataset/2ramvba12cngh2mujzqsjz2vik/ |
Title | Dataset for publication TiSe2 phase diagram |
Description | Dataset for publication entitled "Reduced critical pressure of the charge density wave in TiSe2 under non-hydrostatic conditions" |
Type Of Material | Database/Collection of data |
Year Produced | 2022 |
Provided To Others? | Yes |
URL | https://data.bris.ac.uk/data/dataset/3msx2960uay8v225eh6s1tg4ka/ |