{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T17:12:45Z","timestamp":1789146765685,"version":"build-2803163510"},"reference-count":48,"publisher":"National Academy of Sciences","issue":"37","license":[{"start":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T00:00:00Z","timestamp":1789084800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100012166","name":"MOST | National Key Research and Development Program of China","doi-asserted-by":"publisher","award":["2023YFA1608900 2021YFA1400300 2024YFA1611300"],"award-info":[{"award-number":["2023YFA1608900 2021YFA1400300 2024YFA1611300"]}],"id":[{"id":"10.13039\/501100012166","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"MOST | National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["12022509 T2121001 12074422 12374468 12375304 12404163)"],"award-info":[{"award-number":["12022509 T2121001 12074422 12374468 12375304 12404163)"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100017670","name":"CAS | Bureau of Frontier Sciences and Education, Chinese Academy of Sciences","doi-asserted-by":"publisher","award":["XDB33000000 YSBR- 100"],"award-info":[{"award-number":["XDB33000000 YSBR- 100"]}],"id":[{"id":"10.13039\/501100017670","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Quantum Science and Technology-National Science and Technology Major Project","award":["2023ZD0300600"],"award-info":[{"award-number":["2023ZD0300600"]}]}],"content-domain":{"domain":["www.pnas.org"],"crossmark-restriction":true},"short-container-title":["Proc. Natl. Acad. Sci. U.S.A."],"published-print":{"date-parts":[[2026,9,15]]},"abstract":"<jats:p>\n                    Lanthanum hydride has attracted significant attention in recent years due to its signatures of superconductivity at around 250 K. However, the required megabar pressures present extraordinary challenges in verifying its Meissner effect. Although nitrogen-vacancy (NV) centers in diamond offer a solution, their application has been limited by insufficient working pressures. In this work, using a gaseous pressure-transmitting medium, the working pressure of NV centers is extended to nearly 180 GPa. With this quantum probe, magnetic field screening and the Meissner effect of lanthanum hydride are observed at around 240 K and 155 GPa, consistent with the record high transition temperature (\n                    <jats:inline-formula>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" display=\"inline\" overflow=\"scroll\">\n                        <mml:msub>\n                          <mml:mi>T<\/mml:mi>\n                          <mml:mrow>\n                            <mml:mtext>c<\/mml:mtext>\n                          <\/mml:mrow>\n                        <\/mml:msub>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    ) of LaH\n                    <jats:sub>10<\/jats:sub>\n                    . Additionally, spatially resolved measurements reveal significant inhomogeneities within an insufficiently annealed sample, which has a lower\n                    <jats:inline-formula>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" display=\"inline\" overflow=\"scroll\">\n                        <mml:msub>\n                          <mml:mi>T<\/mml:mi>\n                          <mml:mrow>\n                            <mml:mtext>c<\/mml:mtext>\n                          <\/mml:mrow>\n                        <\/mml:msub>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    of approximately 220 K. Independent X-ray diffraction measurements indicate that this\n                    <jats:inline-formula>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" display=\"inline\" overflow=\"scroll\">\n                        <mml:msub>\n                          <mml:mi>T<\/mml:mi>\n                          <mml:mrow>\n                            <mml:mtext>c<\/mml:mtext>\n                          <\/mml:mrow>\n                        <\/mml:msub>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    could originate from the LaH\n                    <jats:sub>\n                      9.5\u00b1\n                      <jats:italic toggle=\"yes\">\u03b4<\/jats:italic>\n                    <\/jats:sub>\n                    <jats:inline-formula>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" display=\"inline\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:mi>F<\/mml:mi>\n                          <mml:mi>m<\/mml:mi>\n                          <mml:mover>\n                            <mml:mn>3<\/mml:mn>\n                            <mml:mo>\u00af<\/mml:mo>\n                          <\/mml:mover>\n                          <mml:mi>m<\/mml:mi>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    phase. Our work provides experimental evidence for superconductivity in lanthanum hydride and highlights the importance of spatially resolved techniques in characterizing and optimizing samples under ultrahigh pressure conditions.\n                  <\/jats:p>","DOI":"10.1073\/pnas.2536915123","type":"journal-article","created":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T16:43:57Z","timestamp":1789145037000},"update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":0,"title":["Imaging the Meissner effect in lanthanum hydride using diamond quantum sensors"],"prefix":"10.1073","volume":"123","author":[{"given":"Yang","family":"Chen","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/034t30j35","id-type":"ROR","asserted-by":"publisher"}],"name":"Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences","place":["Beijing, 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