CINXE.COM
Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="390"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "journals.aps.org",cType: 'managed',cRay: '8e70bff179acce26',cH: 'fjW.3CmErcOz93Vpl8TU7lDxYFKbQ12IQdVLSEgjf1E-1732360614-1.2.1.1-kvGVvs8ObAH0jCNICe72_xjuTPbdjSngFNl.LcpmqDerN7LirxPsLWNPypXM6gI4',cUPMDTk: "\/prb\/abstract\/10.1103\/PhysRevB.50.17953?__cf_chl_tk=R3.eCNIfdoC4.Dwkq4vxbH_7mCBwDGFMKXAu9qT6SXM-1732360614-1.0.1.1-5Xu5nalic790CgjeRt5UgW0y2wW_66nuKgyQuYGeA6w",cFPWv: 'g',cITimeS: '1732360614',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/prb\/abstract\/10.1103\/PhysRevB.50.17953?__cf_chl_f_tk=R3.eCNIfdoC4.Dwkq4vxbH_7mCBwDGFMKXAu9qT6SXM-1732360614-1.0.1.1-5Xu5nalic790CgjeRt5UgW0y2wW_66nuKgyQuYGeA6w",md: "QFlWHJ4KCVOx4akKJ51o4iKNmdU6XoVRm_JqARKbXbE-1732360614-1.2.1.1-W9EmyrCWWfnpzAFq3t28rrPF3iUvCtXsQ96MJWtXduqqxCbqm_nnFLIH5ylGJfZllwZ8f3VBOtH99n4RsW7cJkEeREikDWayzc5UgP5GFLj.o42ujxGloe4wAxNen7ShPaMKqZRTRtzlB6dty_vBBxO.29WhVLTbUA0Zwda_FS6mhBQm.EWGoEKlxtraKPbVCEeb7khX5RXnsJDZSdBLZ5ETDEZwsWfrSun.hhdLAoChH9WcSM9Rlz6t48bgTYFrHFrGLK3fs3kKnzbuCbjh83..buOKS1A5.us7yCE_1ZwjxMV_fUKHWyDqm6XXbE2QAwl17BaGEt1DmZspvthVLjxGjwZplftn054liseADl55r3fnrfCDKHRh6YxX.QznpqTp68ATY.HaPxqiSYAl66bkDyG_LB_uZlU6d7dckZT3DFdn_aQC2qOc6HcOqe4g9GM9wP11LYCdShksq_FDKFmPu9Ulwle5Pl5emg6k4GPQddJPu3FmbxM1fxZ7JuMwwsbc_GSuvUgZNf..af4XCjo4znmD52WC_6H9fByUnlXaEoi7nKkvv0bYz6Jy6EkOOxc7hOOLbfOTPEodpWHGdWzRPdRTjPsrt79eP1R1LQ3A57f7qaxYZgRYSAurUPs8W4cVEEVkZglLHJct10zvngOyhKOnmeSPhsRDvcMgfXre1dS.Za7eHcEn5XC0Z9rDevfD629TaveJF1W6UT6QFfwkKWxO_lqs0lFRkt0x9U_qsBLGTPrScLO1XBetxVy2H3ntoYr.8g.dXLAqmXKT3uxx_D.wgfQat4xO5dgJLEVwTr.f60JtB0ix9iF0I5UG57GgxwD2uJu8b7ackP93sZhVEALFN3gzFmoB8k.jWtClvhP5LVBTMN87zZaZHDWMLjcAxFgMOHqsUVsAnPC_HtblrhrKsHiFHtrX7bxpCs8Xt0j0kkNm4gWI6zhHPzRuHGly_5ObVzs0RY2.n8nRQa67tSHu.y.6iMdAjVKudZ4Wzu6FMuu8ll5bb3gJbH.NYRbyBfHN_V.DGwGfYqF43M_qzBvSk5Kbl5En4bdTQUd.dMfJg39TIWAY8SDiFiElyqTdB9M1iD_wxy8k_fs62A8DfeBy4EZ1yYZUjnYdEDt5yagLHuNl7aAJ8P_Sm7h36Gh0oI_fIBA7mIO2ecFDbFOOGZrGeN03frqvHxHvnpqm5KmA_Fiwj_NYU7_CdWHjQkjOE_zv3lTha3z5YcZBeSg_kjvrJskaSmDUVddGI18qfn.5dCHzahbK8kUbmyPIbsWr4uqeZdUwMfqTuGG7Vo_sF..Z4n00mUeKnegS00vPD7Z.Rzq.tpdQr4eHvG_fHcgo8ByFmec7bITGJAbSUjyhCQcBKRF1w5ks4rU9BOq1CvJb2L_bB0xOwm2.5d0tfJa5YANw8uX3DsqW38VzoAj2odUjV8bWWIPNlyXFhZLzhYYdJ_ZzOqrBkkudIeDW6U2xyVftwiqZElhcTTMSpiu0eUsIoaa5ttMjl0_ZrCqwhUNpLto53g1bf1jAPhVELv6dVLlR7oAqPXi4z1MyQLWO4Jld11ARChRyyRzpzT2i_ilBsjMhQK6NNve41I5Dz0.i.lL3AajLM_sxuCk_dzZinaqWpkfUIzDcgoaKxqO9spsnSHcwytxGPqznZLzzsndJETh4jeXaHZq7jeJ13twakTeEsZn9dD.YFW8S1vZ7G.XAYFbzsnBdaZCUWkylyg_K2CRju6BzJeo7aldYUzAKaRR9y78N9w2BZa1W0Ln6m8Gb36y4nOfucanhuVH038jLm0N98jSnS0oltaD1m9aWQSwWc4sAH5hLH6K2cfKq6oWe1GzV0lqEy7EOm3T4MHUwWtejSdmPnjkDeV3OyLfsceJfBhuXgyt2KerbvDubzDrgPzVgzDP8kWVcJLIShlE8t95dB5EpMLswlpVYWQmdmIXOPt7GhCObxqxKJw_dp25A74eD4vWmW4ynRjY7ebc18zINf82rZNrcgB2UbHDg1sFyIt_BBCAnJisBVZo5.Ev8ezgg_iORONHAWHlEaIkwpZfWThrccFUxuAGe0K3tLtFx5AdUUnBmuv7hAKJfuzrvDoD5AGAKIGBU970tTy3hUUwmIL0gWB3UYGOpaHVDweZZ.3VONdshv9kBkDh3W.d2PAwGIsrpWI62XFZiPzwrD5JtaaDmb._1N1MDyatb2zF.wd0KihcJ7tcj.dNUJBvrtltO8fQ.IVRqlQVRM0yJ8HRwQLsz14ewi2ewwy__w_lqUv855Eo.XjNYl0C9JJUxrTcRvYkP5ornVgXCVPUbX.CTHfPjuGGbVZbshhH4Wz9UcH82bRMeOh.v.E10w2u8xpueLBufamwQZveaflyzrlOjKQ0hfY7epao5TSeRBm.PnOHo1TDUgGEBAlX0w5kbkEwwwhnlBvEZA.Qd2J27zs.EPugFvP7T2l6sb51GwZ2FZ2j0bQ_ZIXN2aVpqL7GvwPwKxealQIsP.LyVN6MIy4LwimDfYk.wVUQDjlJr71ZukVAl3kwV.x2o1R6ywPC8jXjWqoLsElYP8uH7.iF4xodxfe7fAynxCxjLJg3iC5uxWQRlGOUN5vDOS39aAxnKj7K4AXAGMP7L5QZLwKwLgIw8Vjb9XOk68ZjDBrqqpKvxe1xIUMNiLVDGw39SO3fLNPTW9_wxwJcrZ.PPjqthvFR2e41OkthRQZ8GOMBCJ6XdmhHDcDonI.IEat2NUx78V0wiUbipBlT0eHFIZtcj2cUKjusx.vaQZxHnqmeBfX2uZK.ZU933GiAALO_cmg4hiLkmpI5YgBX9T7cQDrUsR65KUt4uJMyzc8_Eiy0zyQyGIYdIkj0834YGyLcG1BFBpcdUJ6j0gnOaeWqQu4pM1rlBhlMNr0rXpV6oH1IQrCkdpMoTKO9zfVXBbOzaKTXacCnYjJD.UiaaFnRcvmxW1S.cMmVVXbP7eHd_hVCeKNfROQXla6Tc8Iwrxac",mdrd: "CMbkWRshbs2Dk_A1llkNP9oYYekOakzW5isK0PMMILI-1732360614-1.2.1.1-HQUNy.9QcbrXZsbj3oqD0cpW12va6GMHxyyyHY30qfqxhEdHVf1cWcaRFaz4INyafN5KNZV9B38e8mRh8T68u1pOoCcpDEQymcc3eQQCwle21kITLdGI9JGbzgx8BSWDdYB5GPBydYAf0W0kf7K7ToQKf58fN9hgImzqShztn84qPr5BCAsIsWq8UAs4as0lCugWFruvNwfuAnc.dUnYAcCYLQr6r6wXSLm5omfnsSmA1DF2HSXdwiN4gtYJcaGLlcjyOhkvIDgC1qHjs.E2ACM6_NmSZ3JPSqgZzKHQVV04tqtEKSJkWYnQr8Wlh_G1NIlaYqOZmc71PtAspJ3O6WgM9yezlI_0C8sSkFyiIlmjGbNaZmnHOZ1hyhR4DFLuW_pzqrqtsGN7D97UhzSTUdWT4JhaiHb57c.WEa5kn4gxpy6xvmXSzO1FHp9XN8MNoVA1mHp5CW04ey6NdW9LbO2bIgJcfMIQ160vM7kkqOL5niKg0Ywzibnu_hjAwvXxlChsvYxHjWWvUMCw6ddxN8iIoQ5z3zRSj0WmB2wghTxnmyr0RNR2hGY50PtmHVXlXTfC72rMYW_r5UAQATuLodbfKcwiNVlzUoOYH0dahPfxvD1xXZMV4UMip6FdbaEm5RCio2UG_Z5Xxa6mQRdj9h.ADfiQt4O4CDz1IyGKWuG.SohsUB4AppM5MdPdW3zDX_yUPwJX1PGoxspitAZkyCbnNqbB8UXMFKj5Tb1J_oAABUqoTXJV2EHmeRT1hAuV8gOC8IhkY47.9jEEMjn9eulDL6z9uEElOnN643wnZ1mrOy5WFSsY5wXVnt7vab4nssLmxhtdOE1aGe9bOJ4fH10T6VqR22pAMfnyUHKsBgCo7NRIZqKPJGN_pPxq6hmA5zHhPeGG3pH8Q6oomnXY95wwNHM1_Uf2NgZKe.Dufnipox1BVwc7QeCT_jOIs7jiA9CSSgPZdTR7fgHzPOvpiSW8KJ2Hc2lXYz.pUlUWnNhmre1NW8Ht8yEMffxIOGQQY_fKe11iQ.KqW1y.Kue1En0TBHWRm4jSOoRkd9ocC5u8XCA0COVNGkXpeBtt8L.I9BKpmqDcZq2UkYTVsH1varbOj8Wqnkf9sp8tm411TfcWYZH.I.uu0KgyYvbXjXviWJfKX19cXLQNzITzJvZ_Qv0jzJzrqFRqX.WZSTI0xV7dagsZpK8ra5sBW9xws6BlG1MYwkHC5JTn98xWCALbzwyklRI9aIV94GgONtQXyFT.rcY8vZbg4yi6LIsBETZAd7a2HRVHSB1QYnphTBak6SigijRnNaL_8CXDqlHG6EYdYtf0U0Hf1vYo9d_v1C6pV5Kt.RemfPZK4uv3vVQYGNVKGm4usnylGQ2omB36FQgcfMrnQYAKc8QNQL5B.7eFz.aniQUNqQdGm_ff9DGzZYxeatTHD3twA8.fGKGuQkI0reZ.zkKb0aAg0Sg_Jo7KPslNlBwTcWItoZNZCweEGO3cT00x3.0C6GsaTIK0fl.kIk5_flwIi3xNXyi95r9y9Qk4n.3lBf0v2hSDd7F7arjz90bPC4UThinzeNSX2DO1veQtXcpzFHvbY_Y.El6whEDxknyJA1I8e4nGcEysdy0ozdQpcRukXloHlKJpyI5_9c3yQRD64y5IzVyDYWi4whPt1U0CFxkSO7JGEte.Vt8ZgviGRHAaV9z4Mxe_1EYqxXyMPEf_uMaKQ3mxEQCkZ5oNYYsUaDKXsKwhdtXekh_BeUaUwAgTAiS.oaZ64lGo7C9xjoNDJPBuCfgU.Qs.8.h2G64Q6xp7RxgK7JitvWuwtVPVwPsSXA0mM3xazUKlDjUVkIdc1Eq.UYoFQ3s74OI118srgQGE1vercMtAcVcr1N._p9zBmfzBbrYUktFi7A6Nbk2IhECSlOUJmC7xaxbphYIOdAlrbKP0XEx5yzshaJFvGahBfxWrpiLBw0c"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=8e70bff179acce26';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/prb\/abstract\/10.1103\/PhysRevB.50.17953?__cf_chl_rt_tk=R3.eCNIfdoC4.Dwkq4vxbH_7mCBwDGFMKXAu9qT6SXM-1732360614-1.0.1.1-5Xu5nalic790CgjeRt5UgW0y2wW_66nuKgyQuYGeA6w" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>