مرکز منطقه ای اطلاع رساني علوم و فناوري - Self-Heating Effect in Intrinsic Tunneling Spectroscopy of <formula formulatype="inline"> <img src="/images/tex/651.gif" alt="{\\rm HgBr}_{2}"> </formula> Intercalated <formula formulatype="inline"> <img src="/images/tex/652.gif" alt="{\\rm Bi}

Title :

Self-Heating Effect in Intrinsic Tunneling Spectroscopy of ${\\rm HgBr}_{2}$ Intercalated ${\\rm Bi}_{2.1}{\\rm</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Author : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Kurter, C. ; Ozyuzer, L. ; Zasadzinski, J.F. ; Hinks, D.G. ; Gray, K.E.</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Author_Institution : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Argonne Nat. Lab., Argonne</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Volume : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>17</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Issue : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>2</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>fYear : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>2007</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>fDate : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>6/1/2007 12:00:00 AM</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Firstpage : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>2976</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Lastpage : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>2979</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Abstract : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>We report tunneling results in intrinsic Josephson junction (IJJ) stacks fabricated in the form of square micromesas on HgBr<sub>2</sub> intercalated Bi<sub>2.1</sub>Sr<sub>1.4</sub>Ca<sub>1.5</sub>Cu<sub>2</sub>O<sub>8+delta</sub> (Bi2212) single crystals using photolithography and Ar ion milling techniques. Self-heating is the most common problem encountered in interlayer tunneling and it is likely to reduce the reliability of IJJ data. Although intercalation reduces heating a hundredfold, it still needs to be minimized substantially in order to approach the authentic superconducting energy gap observed by tunneling using more conventional junctions. We report tunneling characteristics of two mesas with the same height but different sizes (5 times 5 mum<sup>2</sup> and 10 times 10 mum<sup>2</sup>) to show that heating effects are strongly related to IJJ stack size. For the smaller mesa, we observed an energy gap close to that seen in single SIN (S: superconductor, I: insulator, N: normal metal) and SIS break junctions as well as the dip and hump structures at high bias. The subgap data of 5 times 5 mum<sup>2</sup> mesa were successfully fit with a momentum averaged d-wave model using convenient parameters. Thus our data is consistent with the predominant pairing symmetry suggested by point contact tunneling, break junction, scanning tunneling microscopy/spectroscopy and angle resolved photoemission measurements in Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8+delta</sub>.</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Keywords : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Cooper pairs; Josephson effect; bismuth compounds; calcium compounds; d-wave superconductivity; high-temperature superconductors; intercalation compounds; mercury compounds; milling; photoelectron spectra; photolithography; point contacts; scanning tunnelling microscopy; scanning tunnelling spectroscopy; strontium compounds; superconducting energy gap; tunnelling spectra; Ar ion milling techniques; HgBr<sub>2</sub>-Bi<sub>2.1</sub>Sr<sub>1.4</sub>Ca<sub>1.5</sub>Cu<sub>2</sub>O<sub>8+delta</sub>; angle resolved photoemission measurements; break junction; d-wave model; high-temperature superconductors; intercalated Bi2212 single crystals; intrinsic Josephson junction stacks; intrinsic tunneling spectroscopy; pairing symmetry; photolithography; point contact tunneling; scanning tunneling microscopy; scanning tunneling spectroscopy; self-heating effect; superconducting energy gap; Argon; Bismuth; Crystals; Heating; Josephson junctions; Lithography; Spectroscopy; Strontium; Superconducting devices; Tunneling; High-<formula formulatype=$ ${rm T}_{c}$ superconductors; intrinsic Josephson junctions; self-heating; tunneling spectroscopy;